Topics

ARISS SSTV Transmissions #iss #sstv

Andy G7KNA
 

Southgate News says that there may be SSTV being broadcast from the
ISS on 6 and 7 June 2018.

I have run approximate pass predictions which you can find here:

https://www.dropbox.com/sh/i8jdu3xmmcagcir/AAAUHj3GC4qtxYfb693ui2G5a?dl=0

These passes are based on the Club QTH Lat/Long at an assumed
elevation of 150m AOD, although unless you are very much lower or
higher than that or significantly distant from the Club QTH then you
probably won't see very much difference to these times.

Details on how to receive the ISS are provided here:

https://amsat-uk.org/beginners/iss-sstv/

If you want to run your own pass predictions use this link:

http://www.amsat.org/track/

I note that the last couple of passes on Thursday 7 June 2018 occur at
20:53 and 22:30 Summer time which means that they occur during the
Clubs meeting time and therefore it might be interesting to have a go
at the Club at receiving something.

73

Andy G7KNA
--
Andy Jenner
Q: What goes; "Pieces of seven, pieces of seven"?
A: A parroty error

mark sherrey
 

Hi Folks

I will have a go and set things up today in readiness for Thursday,. but if anybody else wishes to have a go at the club with their own equipment please feel free. And indeed have ago today and bring in your results...exciting!!

Mark.

Andy G7KNA
 

I just tried to receive the 20:08:58 - 20:19:38 BST pass.

I was situated in the Works QTH car park down in Bristol Harbour near the SS Great britain with a Baofeng UV-5R tuned to 145.800 and squelch fully open with a quarter wave vertical on a roof rack mount on top of the car.

I wasn't intending to make a live decode just to test for signal presence.

Unfortunately no signal received. This might mean that the planned SSTV activity has not been instigated or has stopped for some technical reason. Alternatively my location and/or equipment might have been less than ideal.

I have heard SSTV from the ISS on the Baofeng before with just a set top quarter wave whip outdoors at home so I would argue that it isn't equipment related so perhaps my location was compromised or the transmissions have ceased.

The pass was from 282 degrees to 112 degrees with a maximum elevation angle of 67 degrees at a bearing of 191 degrees, not the highest target in the sky admittedly especially from a city centre location but I would have hoped high enough to not be obscured by buildings or the hills out Dundry way which is pretty much 191 degrees from this location.

The good passes to try for are 17:40 BST and 19:16 BST when the maximum elevation is almost overhead at 87 degrees and 84 degrees respectively. The next two passes which are during Club time at 20:53 BST and 22:30 BST have a maximum elevation of 28 degrees and 6 degrees respectively, neither of which is great but the Club does have an elevational advantage over the docks!

73

Andy G7KNA

 

As you may have seen in todays (28/06/2018) Southgate Newsfeed posts there is once again the possibility of SSTV broadcasts from the ISS.

These transmissions are automated and scheduled to run from around 09:00 GMT on Friday 29 June 2018 continuing until 18:30 GMT on Sunday 1 July 2018.

The transmissions supporting this event are stored in a computer on the ISS Russian Segment, and are transmitted to Earth using amateur radio, specifically the onboard Kenwood TM-D710E transceiver.
 
These images will commemorate the various satellites that were hand-deployed from the ISS. These will include the first satellite deployment from ISS: Suitsat-1/Radioskaf-1 which was developed by ARISS and deployed in February 2006.
 
The transmissions will be made on 145.800 MHz FM using the PD-120 SSTV mode.
 
The ISS puts out a strong signal on 145.800 MHz FM and a 2m handheld with a 1/4 wave antenna will be enough to receive it. The FM transmission uses 5 kHz deviation which is standard in much of the world. In IARU Region 1 (British Isles, Europe, Africa) FM equipment is usually set by default to the narrower 2.5 kHz deviation.
 
Many FM rigs can be switched been wide and narrow deviation FM filters. For best results you should select the filter for wider deviation FM. Handhelds all seem to have a single wide filter fitted as standard.
 
During most of a pass the ISS may be more than 15 degrees above the horizon so an antenna with a high radiation angle will give better results. Simple antennas such as an outdoor ¼ wave ground plane or dipole should give good results. Large 2m colinear antennas don’t work quite as well because their radiation pattern is concentrated at the horizon.

You can either record the signals heard on the pass using a digital recorder or a suitable app on a mobile phone or you can attempt to decode the images on the fly by feeding the received audio directly into a suitable SSTV program such as QSSTV or MMSSTV.

There is the facility to upload your images back to ARISS so they can monitor the performance of the system:

http://www.spaceflightsoftware.com/ARISS_SSTV/submit.php

I have run passes for the Club HQ and these can be downloaded from:

https://www.dropbox.com/sh/i8jdu3xmmcagcir/AAAUHj3GC4qtxYfb693ui2G5a?dl=0

Although these passes are location and elevation specific there will be little variation unless you are substantially distant or lower than the Club QTH is.  You are, however, recommended to check the actual pass times and durations at your QTH to ensure you have accurate bearings.

Don't forget that the pas prediction times are UTC and we are currently BST (UTC+1)

Pass predictions can be made through a variety of programs and apps but are also available online at:

http://www.amsat.org/track/

Have a go and have fun!
--
73

Hon Sec SBARC
for and on behalf of SBARC
https://www.sbarc.co.uk

Andy G7KNA
 

I managed to hear both the 10:23 UTC and the 11:59 UTC passes from the office car park in Bristol Docks near the SS Great Britain.

Equipment used Baifeng UV5R with squelch fully open and  quarter wave antenna on the roof rack.

Recorded both passes for later decoding


 

Yes, there are rumoured to be a few more chances to receive SSTV from the ISS.
 
According to SouthGate News:
 
ISS SSTV to be active Monday/Tuesday
The Russian cosmonauts on the International Space Station are expected to activate amateur radio Slow Scan Television (SSTV) transmissions on 145.800 MHz FM during July 30 and 31 
 
The Inter-MAI-75 SSTV experiment should be active on:
• Monday, July 30 from 16:00-19:30 UT
• Tuesday, July 31 from 13:25-19:15 UT
 
The SSTV images will be transmitted on 145.800 MHz FM using the Kenwood TM-D710 transceiver located in the Russian ISS Service module. It is expected they will use the PD-120 SSTV format.
 
Note the ISS transmissions use the 5 kHz deviation FM standard rather than the narrow 2.5 kHz used in Europe. If your transceiver has selectable FM filters try using the wider filter. Handheld transceivers generally have a single wide filter fitted as standard and you should get good results outdoors using just a 1/4 wave whip antenna.
 
ISS SSTV links for tracking and decoding software
 
I have as usual run a series of pass predictions for the Clubhouse using the AMSAT Online Pass Predictor, this can be downloaded from:
 
 
Give it a try and see what you hear, or as this is SSTV hear what you see!
 
-- 
73
 
Hon Sec SBARC
for and on behalf of SBARC
https://www.sbarc.co.uk

 
Edited

Source AMSAT News Service via Southgate Amateur Radio News Feed

ARISS joins NASA On-The-Air for a special SSTV event

Amateur Radio On The International Space Station (ARISS) is planning a very special Slow Scan Televison (SSTV) event during October 27-29 on 145.800 MHz FM using PD-120

SSTV transmissions are currently scheduled to start October 27 about 1000 UTC. Helping to support the event will be NASA's Space, Communication and Navigation (SCaN) Department.

The Space Communications and Navigation (SCaN) program manages NASA's three most important communications networks: The Space Network (SN), Near Earth Network (NEN), and the Deep Space Network (DSN).

Just as in past ARISS SSTV commemorations, twelve images will be downlinked, but this time with six featuring the SCaN educational activities while the other six images will commemorate  major NASA anniversaries, ie., when NASA was established, astronauts first landing on the moon, etc.

In addition to the fun of receiving these images, participants can qualify for a special endorsement for the NASA On The Air (NOTA) celebration event. To learn more about NOTA visit https://nasaontheair.wordpress.com/

Once received, images can be posted and viewed at http://www.spaceflightsoftware.com/ARISS_SSTV/index.php

The transmissions are expected to be broadcast at the usual frequency of 145.800 MHz using the PD-120 SSTV mode.

Please note that the event is dependent on other activities, schedules and crew responsibilities on the ISS and are subject to change at any time.

Slow Scan Television (SSTV) is transmitted from the amateur radio station in the Russian Service Module of the International Space Station. The equipment used is a Kenwood D710 transceiver running about 25 watts output which provides a very strong signal enabling reception using simple equipment.

All you need to do to receive SSTV pictures direct from the space station is to connect the audio output of a scanner or amateur radio transceiver via a simple interface to the soundcard on a PC, iOS or Android device, and tune in to 145.800 MHz FM. You can even receive pictures by holding a mobile 'phone next to the radio loudspeaker.

Recommended decoding software (links not tested)

For iOS use "SSTV Slow Scan TV" by Black Cat Systems
https://itunes.apple.com/app/sstv/id387910013

For Android use "Robot36"
https://play.google.com/store/apps/details?id=xdsopl.robot36&hl=en

For Windows use "MMSSTV" (see AMSAT UK link below for setup)
http://hamsoft.ca/pages/mmsstv.php

RX-SSTV is another Windows option. If you disable BPF (band pass filter I believe) on RX-SSTV it will decode them as sharp as MMSSTV. If the reception is noisy enable BPF and things will be smoothed out a bit. In that case the decode might look better than MMSSTV's decodes. They are easy to compare if you record your passes and decode them later.

For Mac OS X use "Multiscan 3B SSTV"
http://www.qsl.net/kd6cji/

For Linux use "QSSTV"
http://users.telenet.be/on4qz/qsstv/index.html

The ISS puts out a strong signal on 145.800 MHz FM and a 2m handheld with a 1/4 wave antenna will be enough to receive it. The FM transmission uses 5 kHz deviation which is standard in much of the world. In IARU Region 1 (British Isles, Europe, Africa) FM equipment is usually set by default to the narrower 2.5 kHz deviation.

Many FM rigs can be switched been wide and narrow deviation FM filters. For best results you should select the filter for wider deviation FM. Handhelds all seem to have a single wide filter fitted as standard.

During most of a pass the ISS may be more than 15 degrees above the horizon so an antenna with a high radiation angle will give better results. Simple antennas such as an outdoor 1/4 wave ground plane or dipole should give good results. Large 2m colinear antennas don't work quite as well because their radiation pattern is concentrated at the horizon.

What to expect during a pass: With PD120 it takes about 2 minutes to send an image. Since atypical pass can be 7 - 10 minutes a number of images can potentially be received during a single ISS pass. You'll also have a better chance of receiving images with less noise, or more complete image transmissions, as you're more likely to receive at least one image closer to the middle of the pass when the signal is strongest.

An ISS pass that goes right overhead (90 degrees elevation), lasts about 10 minutes. ISS SSTV transmit time and off time are usually setup to provide the radio with a 50% duty cycle (only transmit half the time so the radio doesn't overheat). With image transmission taking two minutes, off time will probably be two minutes as well. It should be relatively easy to receive at least two complete images in one pass, with the possibility to receive up to three images if timing, conditions, and setup are ideal.

When the ISS comes into view/has line of sight with you, this is known as Acquisition of Signal, or AOS. The ideal situation for a high elevation 10 minute pass would be if the first image started transmitting exactly at your AOS, and you had a directional antenna so you could receive the signal even while the ISS was very low in the beginning and end of the pass.

In this case you would be able to receive three images like this:

<table>
<thead>
<tr><th>minute</th><th>image TX/off</th></tr>
</thead>
<tbody>
<tr><td>0 - 2</td><td>complete image 1</td></tr>
<tr><td>2 - 4</td><td>off</td></tr>
<tr><td>4 - 6</td><td>complete image 2</td></tr>
<tr><td>6 - 8</td><td>off</td></tr>
<tr><td>8 - 9</td><td>complete image 3</td></tr>
</tbody>
</table>

The more common situation will be that the first image transmission will start either before or after AOS. In this case you will only have the opportunity to receive two complete images, but this is still twice the amount of images that were possible with PD180. The downside is the image quality is not as high as with PD180.

Even though you'll have the opportunity to receive two complete images, don't expect to. It may take practice and it will certainly take the right setup and conditions, to get just one complete image. With that said, here are some tips that may help you get more images and/or better images.

Check Twitter for #ISS #SSTV status and images: For several hours after the April and July 2015 SSTV events were scheduled to start, only a "blank signal" was transmitted. There was no audio so no images could be decoded. During these events Twitter users all over the world posted what they heard using hashtags #ISS #SSTV. As soon as people started hearing the SSTV audio, they reported it on Twitter.

By searching for these hashtags you can stay up to date on the current status of the transmissions, which sometimes go longer than scheduled. Maybe more importantly, you can also see all the images people are getting!

SSTV Status reports can also be found on ISS Fan Club on the right side of the page. For details on all reports on that website go to https://www.issfanclub.com/sstv-reports

Lastly, if you go to the AMSAT satellite status page you can see “ISS-SSTV” reports at the very bottom of the table. Yellow coloured cells mean it was heard. Red means it wasn't heard. Cells closer to the left are most recent. If you mouse over a cell you can see all the reports for that hour, who it was by, and in what 15 minute block of the cell hour it was relevant to.

Open the squelch: For weak signal work you always want to leave the squelch wide open to avoid missing any signals. Even though the radio used for ISS SSTV puts out 25 watts, which is a lot for an amateur radio satellite, the signal is still relatively weak when it's hundreds of miles away and hundreds of miles high. Don't miss any of the signal. Keep the squelch open.

This will also make it easier to identify the signal when it first comes in, or when the transmission first starts because the change between the high volume of the noise/static and the relative low volume of the transmitted signal will be more noticeable than if you had the squelch closed.

Record audio and decode later: During previous SSTV events some listeners didn't configure their SSTV apps/software for the right mode. Even though they received the signal/audio from the ISS, since the software wasn't configured properly, they decoded no images.

A wise choice would be to just record the audio from the radio and play it back later when you have time to experiment with different settings. This also makes it easier to fix slanted images/correct for bad sync, which are common issues.

If you decide to just record the audio and worry with decoding later, record the audio at a high quality to preserve as much of the original fidelity of the audio as possible, otherwise the quality of the image will suffer.

Test Decoding Software: It's really exciting to watch images decode live while receiving the SSTV transmission from the ISS. If you don't want to record the pass and decode later, or you want to decode live and record, make sure to test your decoding software so you know it will work at the moment of truth. To do this you'll need to play back an audio recording of an SSTV transmission created using the same mode as the ISS will be using.

https://youtu.be/fGBmUTESnC8

https://soundcloud.com/spacecomms/pd180-sstv-test-recording

https://www.dropbox.com/s/cgp5gtkzjdvm0m3/Space_Comms_PD180_SSTV_Test_Recording.mp3?dl=0

Try low elevation passes if you have a directional antenna: If you're using a directional antenna like an Arrow II antenna or a tape measure antenna, don't limit yourself to high elevation/altitude passes. With the 25 watt ISS SSTV transmissions, you can receive the signal from horizon to horizon. Even a pass with only a max elevation of five degrees can produce good images.

As usual I have run predictions for the Clubhouse at Novers Park Community Association. These will be more or less accurate for most people in the surrounding area but local Acquisition of Signal (AoS) and Loss of Signal (LoS) times will be affected by your local topography and your elevation. I usually find that AoS predictions at my QTH are 90 seconds or so early due to a local hill that artificially raises my horizon.

<table>
<thead>
<tr><th>Date (UTC)</th><th>AOS (UTC)</th><th>Duration</th><th>AOS Azimuth</th><th>Maximum Elevation</th><th>Max Elevation Azimuth</th><th>LOS Azimuth</th><th>LOS (UTC)</th></tr>
</thead>
<tbody>
<tr><td>27/10/18</td><td>12:11:32</td><td>00:09:35</td><td>281</td><td>17</td><td>222</td><td>154</td><td>12:21:07</td></tr>
<tr><td>27/10/18</td><td>13:50:27</td><td>00:02:20</td><td>248</td><td>1</td><td>235</td><td>222</td><td>13:52:47</td></tr>
<tr><td>28/10/18</td><td>04:55:29</td><td>00:08:19</td><td>187</td><td>9</td><td>147</td><td>84</td><td>05:03:48</td></tr>
<tr><td>28/10/18</td><td>06:30:12</td><td>00:10:29</td><td>232</td><td>38</td><td>137</td><td>76</td><td>06:40:41</td></tr>
<tr><td>28/10/18</td><td>08:06:25</td><td>00:10:46</td><td>262</td><td>88</td><td>316</td><td>84</td><td>08:17:11</td></tr>
<tr><td>28/10/18</td><td>09:42:57</td><td>00:10:44</td><td>280</td><td>78</td><td>194</td><td>106</td><td>09:53:41</td></tr>
<tr><td>28/10/18</td><td>11:19:27</td><td>00:10:12</td><td>283</td><td>25</td><td>227</td><td>141</td><td>11:29:39</td></tr>
<tr><td>28/10/18</td><td>12:56:54</td><td>00:06:24</td><td>267</td><td>4</td><td>241</td><td>192</td><td>13:03:18</td></tr>
<tr><td>29/10/18</td><td>04:04:40</td><td>00:06:38</td><td>169</td><td>5</td><td>128</td><td>92</td><td>04:11:18</td></tr>
<tr><td>29/10/18</td><td>05:38:29</td><td>00:10:09</td><td>220</td><td>26</td><td>164</td><td>77</td><td>05:48:38</td></tr>
<tr><td>29/10/18</td><td>07:14:25</td><td>00:10:45</td><td>255</td><td>79</td><td>168</td><td>80</td><td>07:25:10</td></tr>
<tr><td>29/10/18</td><td>08:50:56</td><td>00:10:38</td><td>276</td><td>89</td><td>289</td><td>98</td><td>09:01:34</td></tr>
<tr><td>29/10/18</td><td>10:27:25</td><td>00:10:28</td><td>284</td><td>36</td><td>191</td><td>130</td><td>10:37:53</td></tr>
<tr><td>29/10/18</td><td>12:04:20</td><td>00:08:08</td><td>275</td><td>9</td><td>235</td><td>175</td><td>12:12:28</td></tr>
</tbody>
</table>

If the above HTML Code does not present a clear table for you, please see the file ISSPasses.HTML which can be found in the PUBLIC DOWNLOADS folder at:

https://www.dropbox.com/sh/i8jdu3xmmcagcir/AAAUHj3GC4qtxYfb693ui2G5a?dl=0

--
73

Hon Sec SBARC
for and on behalf of SBARC
https://www.sbarc.co.uk

 

ARISS is planning another of their popular Slow Scan Television (SSTV) experiment events. Transmissions are scheduled to begin Friday 08/02/2019 at 18:25 UTC and run through until Sunday 10/02/2019 at 18:30 UTC.

SSTV operations is a process by which images are sent from the International Space Station (ISS) via ham radio and received by ham operators, shortwave listeners and other radio enthusiasts on Earth; similar to pictures shared on cell phones using TWITTER or INSTAGRAM.

When this event becomes active, SSTV images will be transmitted from the ISS at the frequency of 145.800 MHz using the SSTV mode of PD120 and can be received using ham radio equipment as simple as a 2 meter FM handheld radio or a common shortwave or scanner receiver the covers the 2 meter ham band (144.000MHz - 146.000MHz) in FM.

Transmissions will consist of eight NASA On The Air (NOTA) images see:
https://nasaontheair.wordpress.com/
 
In addition, four ARISS commemorative images will also be included.

Once received, Images can be posted and viewed by the public at:
http://www.spaceflightsoftware.com/ARISS_SSTV/index.php

In addition, you can receive a special SSTV ARISS Award for posting your image. Once the event begins, see details at:
https://ariss.pzk.org.pl/sstv/

Please note that the event is dependent on other activities, schedules and crew responsibilities on the ISS and are subject to change at any time.

Please check for news and the most current information on the AMSAT.org and ARISS.org websites, the AMSAT-BB@..., the ARISS Facebook at Amateur Radio On The International Space Station (ARISS) and ARISS twitter @ARISS_status.

Slow Scan Television (SSTV) is transmitted from the amateur radio station in the Russian Service Module of the International Space Station. The equipment used is a Kenwood D710 transceiver running about 25 watts output which provides a very strong signal enabling reception using simple equipment.

All you need to do to receive SSTV pictures direct from the space station is to connect the audio output of a scanner or amateur radio transceiver via a simple interface to the soundcard on a PC, iOS or Android device, and tune in to 145.800 MHz FM. You can even receive pictures by holding a mobile 'phone next to the radio loudspeaker.

Recommended decoding software (links not tested)

For iOS use "SSTV Slow Scan TV" by Black Cat Systems
https://itunes.apple.com/app/sstv/id387910013

For Android use "Robot36"
https://play.google.com/store/apps/details?id=xdsopl.robot36&hl=en

For Windows use "MMSSTV" (see AMSAT UK link below for setup)
http://hamsoft.ca/pages/mmsstv.php

RX-SSTV is another Windows option. If you disable BPF (band pass filter I believe) on RX-SSTV it will decode them as sharp as MMSSTV. If the reception is noisy enable BPF and things will be smoothed out a bit. In that case the decode might look better than MMSSTV's decodes. They are easy to compare if you record your passes and decode them later.

For Mac OS X use "Multiscan 3B SSTV"
http://www.qsl.net/kd6cji/

For Linux use "QSSTV"
http://users.telenet.be/on4qz/qsstv/index.html

The ISS puts out a strong signal on 145.800 MHz FM and a 2m handheld with a 1/4 wave antenna will be enough to receive it. The FM transmission uses 5 kHz deviation which is standard in much of the world. In IARU Region 1 (British Isles, Europe, Africa) FM equipment is usually set by default to the narrower 2.5 kHz deviation.

Many FM rigs can be switched been wide and narrow deviation FM filters. For best results you should select the filter for wider deviation FM. Handhelds all seem to have a single wide filter fitted as standard.

During most of a pass the ISS may be more than 15 degrees above the horizon so an antenna with a high radiation angle will give better results. Simple antennas such as an outdoor 1/4 wave ground plane or dipole should give good results. Large 2m co-linear antennas don't work quite as well because their radiation pattern is concentrated at the horizon.

With PD120 it takes about 2 minutes to send an image. Since a typical pass can be 7 - 10 minutes a number of images can potentially be received during a single ISS pass. You'll also have a better chance of receiving images with less noise, or more complete image transmissions, as you're more likely to receive at least one image closer to the middle of the pass when the signal is strongest.

An ISS pass that goes right overhead (90 degrees elevation), lasts about 10 minutes. ISS SSTV transmit time and off time are usually setup to provide the radio with a 50% duty cycle (only transmit half the time so the radio doesn't overheat). With image transmission taking two minutes, off time will probably be two minutes as well. It should be relatively easy to receive at least two complete images in one pass, with the possibility to receive up to three images if timing, conditions, and setup are ideal.

When the ISS comes into view/has line of sight with you, this is known as Acquisition of Signal, or AoS. The ideal situation for a high elevation 10 minute pass would be if the first image started transmitting exactly at your AoS, and you had a directional antenna so you could receive the signal even while the ISS was very low in the beginning and end of the pass.

In this case you would be able to receive three images like this:

<table>
<thead>
<tr><th>Minute</th><th>Image TX/Off</th></tr>
</thead>
<tbody>
<tr><td>0 - 2</td><td>Complete image 1</td></tr>
<tr><td>2 - 4</td><td>TX off</td></tr>
<tr><td>4 - 6</td><td>Complete image 2</td></tr>
<tr><td>6 - 8</td><td>TX off</td></tr>
<tr><td>8 - 9</td><td>Complete image 3</td></tr>
</tbody>
</table>

The more common situation will be that the first image transmission will start either before or after AoS. In this case you will only have the opportunity to receive two complete images, but this is still twice the amount of images that were possible with PD180 which was the previous encoding employed by the ISS. The downside is the image quality is not as high as with PD180.

Even though you'll have the opportunity to receive two complete images, don't expect to. It may take practice and it will certainly take the right setup and conditions, to get just one complete image. With that said, here are some tips that may help you get more images and/or better images.

Check Twitter for #ISS #SSTV status and images: For several hours after the April and July 2015 SSTV events were scheduled to start, only a "blank signal" was transmitted. There was no audio so no images could be decoded. During these events Twitter users all over the world posted what they heard using hashtags #ISS #SSTV. As soon as people started hearing the SSTV audio, they reported it on Twitter.

By searching for these hashtags you can stay up to date on the current status of the transmissions, which sometimes go longer than scheduled. Maybe more importantly, you can also see all the images people are getting!

SSTV Status reports can also be found on ISS Fan Club on the right side of the page. For details on all reports on that website go to https://www.issfanclub.com/sstv-reports

Lastly, if you go to the AMSAT satellite status page you can see "ISS-SSTV" reports at the very bottom of the table. Yellow coloured cells mean it was heard. Red means it wasn't heard. Cells closer to the left are most recent. If you mouse over a cell you can see all the reports for that hour, who it was by, and in what 15 minute block of the cell hour it was relevant to.

Open the squelch; for weak signal work you always want to leave the squelch wide open to avoid missing any signals. Even though the radio used for ISS SSTV puts out 25 watts, which is a lot for an amateur radio satellite, the signal is still relatively weak when it's hundreds of miles away and hundreds of miles high. Don't miss any of the signal. Keep the squelch open.

This will also make it easier to identify the signal when it first comes in, or when the transmission first starts because the change between the high volume of the noise/static and the relative low volume of the transmitted signal will be more noticeable than if you had the squelch closed.

Record audio and decode later; during previous SSTV events some listeners didn't configure their SSTV apps/software for the right mode. Even though they received the signal/audio from the ISS, since the software wasn't configured properly, they decoded no images.

A wise choice would be to just record the audio from the radio and play it back later when you have time to experiment with different settings. This also makes it easier to fix slanted images/correct for bad sync, which are common issues.

If you decide to just record the audio and worry with decoding later, record the audio at a high quality to preserve as much of the original fidelity of the audio as possible, otherwise the quality of the image will suffer.

Test Decoding Software; it's really exciting to watch images decode live while receiving the SSTV transmission from the ISS. If you don't want to record the pass and decode later, or you want to decode live and record, make sure to test your decoding software so you know it will work at the moment of truth. To do this you'll need to play back an audio recording of an SSTV transmission created using the same mode as the ISS will be using.

https://youtu.be/fGBmUTESnC8

https://soundcloud.com/spacecomms/pd180-sstv-test-recording

https://www.dropbox.com/s/cgp5gtkzjdvm0m3/Space_Comms_PD180_SSTV_Test_Recording.mp3?dl=0

Try low elevation passes if you have a directional antenna; if you're using a directional antenna like an Arrow II antenna or a tape measure antenna, don't limit yourself to high elevation/altitude passes. With the 25 watt ISS SSTV transmissions, you can receive the signal from horizon to horizon. Even a pass with only a max elevation of five degrees can produce good images.

As usual I have run predictions for the Clubhouse at Novers Park Community Association. These will be more or less accurate for most people in the surrounding area but local Acquisition of Signal (AoS) and Loss of Signal (LoS) times will be affected by your local topography and your elevation. I usually find that AoS predictions at my QTH are 90 seconds or so early due to a local hill that artificially raises my horizon.

<table>
<thead>
<tr><th>Date (UTC)</th><th>AoS<br/>Acquisition of Signal<br/>(Time UTC)</th><th>Duration<br/>(Hr:Min:Sec)</th><th>AoS<br/>Acquisition of Signal<br/>Azimuth or Bearing (Degrees)</th><th>Maximum Elevation<br/>(Degrees)</th><th>Maximum Elevation<br/>Azimuth or Bearing (Degrees)</th><th>LoS<br/>Loss of Signal<br/>Azimuth or Bearing (Degrees)</th><th>LoS<br/>Loss of Signal<br/>(Time UTC)</th></tr>
</thead>
<tbody>
<tr><td>08/02/19</td><td>18:20:13</td><td>00:10:04</td><td>283</td><td>23</td><td>226</td><td>144</td><td>18:30:17</td></tr>
<tr><td>08/02/19</td><td>19:57:52</td><td>00:05:51</td><td>264</td><td>3</td><td>239</td><td>198</td><td>20:03:43</td></tr>
<tr><td>09/02/19</td><td>11:05:31</td><td>00:06:58</td><td>174</td><td>6</td><td>133</td><td>91</td><td>11:12:29</td></tr>
<tr><td>09/02/19</td><td>12:39:38</td><td>00:10:16</td><td>223</td><td>28</td><td>169</td><td>76</td><td>12:49:54</td></tr>
<tr><td>09/02/19</td><td>14:15:41</td><td>00:10:45</td><td>257</td><td>83</td><td>174</td><td>81</td><td>14:26:26</td></tr>
<tr><td>09/02/19</td><td>15:52:14</td><td>00:10:46</td><td>277</td><td>88</td><td>216</td><td>100</td><td>16:03:00</td></tr>
<tr><td>09/02/19</td><td>17:28:45</td><td>00:10:26</td><td>284</td><td>33</td><td>191</td><td>132</td><td>17:39:11</td></tr>
<tr><td>09/02/19</td><td>19:05:48</td><td>00:07:52</td><td>273</td><td>8</td><td>233</td><td>178</td><td>19:13:40</td></tr>
<tr><td>10/02/19</td><td>10:15:46</td><td>00:04:39</td><td>152</td><td>2</td><td>126</td><td>100</td><td>10:20:25</td></tr>
<tr><td>10/02/19</td><td>11:48:35</td><td>00:09:48</td><td>211</td><td>20</td><td>152</td><td>78</td><td>11:58:23</td></tr>
<tr><td>10/02/19</td><td>13:24:16</td><td>00:10:43</td><td>248</td><td>67</td><td>156</td><td>78</td><td>13:34:59</td></tr>
<tr><td>10/02/19</td><td>15:00:46</td><td>00:10:46</td><td>273</td><td>85</td><td>352</td><td>93</td><td>15:11:32</td></tr>
<tr><td>10/02/19</td><td>16:37:18</td><td>00:10:41</td><td>284</td><td>48</td><td>190</td><td>122</td><td>16:47:59</td></tr>
<tr><td>10/02/19</td><td>18:14:02</td><td>00:09:04</td><td>279</td><td>13</td><td>219</td><td>163</td><td>18:23:06</td></tr>
</tbody>
</table>

If the above HTML Code does not present a clear table for you, please download the file ISSPasses.html which can be found in the PUBLIC DOWNLOADS folder at:

https://www.dropbox.com/sh/i8jdu3xmmcagcir/AAAUHj3GC4qtxYfb693ui2G5a?dl=0

Once downloaded to your local device you can open this information in any modern web browser such as Firefox, Chrome, Chromium, Safari, Silk, MS Internet Explorer and the like.

About ARISS

Amateur Radio on the International Space Station (ARISS) is a cooperative venture of international amateur radio societies and the space agencies that support the International Space Station (ISS). In the United States, sponsors are the Radio Amateur Satellite Corporation (AMSAT), the American Radio Relay League (ARRL), the Center for the Advancement of Science in space (CASIS) and National Aeronautics and Space Administration (NASA).

The primary goal of ARISS is to promote exploration of science, technology, engineering, and mathematics (STEM) topics by organising scheduled contacts via amateur radio between crew members aboard the ISS and students in classrooms or public forms. Before and during these radio contacts, students, educators, parents, and communities learn about space, space technologies, and amateur radio. For more information, see www.ariss.org.

--
73

Hon Sec SBARC
for and on behalf of SBARC
https://www.sbarc.co.uk

Andy G7KNA
 

Southgate News reports a timing change for the planned SSTV broadcasts this weekend.

It is now anticipated that transmissions will commence at 14:00 UTC on Friday February 8 2019 (earlier than the originally announced 18:25 UTC) and continue until 18:30 UTC on Sunday February 10 2019 as originally planned.

I expect our erstwhile secretary will update the pass prediction table as a result of the earlier availability of the ISS
--
Andy Jenner G7KNA
www.g7kna.co.uk ( http://www.g7kna.co.uk )
https://twitter.com/g7kna
www.linkedin.com/in/andywjenner ( http://www.linkedin.com/in/andywjenner )

 

Updated pass predictions:

<table>
<thead>
<tr><th>Date (UTC)</th><th>AoS<br/>Acquisition of Signal<br/>(Time UTC)</th><th>Duration<br/>(Hr:Min:Sec)</th><th>AoS<br/>Acquisition of Signal<br/>Azimuth or Bearing (Degrees)</th><th>Maximum Elevation<br/>(Degrees)</th><th>Maximum Elevation<br/>Azimuth or Bearing (Degrees)</th><th>LoS<br/>Loss of Signal<br/>Azimuth or Bearing (Degrees)</th><th>LoS<br/>Loss of Signal<br/>(Time UTC)</th></tr>
</thead>
<tbody>
<tr><td>08/02/19</td><td>15:07:06</td><td>00:10:40</td><td>264</td><td>87</td><td>336</td><td>85</td><td>15:17:46</td></tr>
<tr><td>08/02/19</td><td>16:43:39</td><td>00:10:46</td><td>281</td><td>74</td><td>193</td><td>108</td><td>16:54:25</td></tr>
<tr><td>08/02/19</td><td>18:20:13</td><td>00:10:04</td><td>283</td><td>23</td><td>226</td><td>144</td><td>18:30:17</td></tr>
<tr><td>08/02/19</td><td>19:57:52</td><td>00:05:51</td><td>264</td><td>3</td><td>239</td><td>198</td><td>20:03:43</td></tr>
<tr><td>09/02/19</td><td>11:05:31</td><td>00:06:58</td><td>174</td><td>6</td><td>133</td><td>91</td><td>11:12:29</td></tr>
<tr><td>09/02/19</td><td>12:39:38</td><td>00:10:16</td><td>223</td><td>28</td><td>169</td><td>76</td><td>12:49:54</td></tr>
<tr><td>09/02/19</td><td>14:15:41</td><td>00:10:45</td><td>257</td><td>83</td><td>174</td><td>81</td><td>14:26:26</td></tr>
<tr><td>09/02/19</td><td>15:52:14</td><td>00:10:46</td><td>277</td><td>88</td><td>216</td><td>100</td><td>16:03:00</td></tr>
<tr><td>09/02/19</td><td>17:28:45</td><td>00:10:26</td><td>284</td><td>33</td><td>191</td><td>132</td><td>17:39:11</td></tr>
<tr><td>09/02/19</td><td>19:05:48</td><td>00:07:52</td><td>273</td><td>8</td><td>233</td><td>178</td><td>19:13:40</td></tr>
<tr><td>10/02/19</td><td>10:15:46</td><td>00:04:39</td><td>152</td><td>2</td><td>126</td><td>100</td><td>10:20:25</td></tr>
<tr><td>10/02/19</td><td>11:48:35</td><td>00:09:48</td><td>211</td><td>20</td><td>152</td><td>78</td><td>11:58:23</td></tr>
<tr><td>10/02/19</td><td>13:24:16</td><td>00:10:43</td><td>248</td><td>67</td><td>156</td><td>78</td><td>13:34:59</td></tr>
<tr><td>10/02/19</td><td>15:00:46</td><td>00:10:46</td><td>273</td><td>85</td><td>352</td><td>93</td><td>15:11:32</td></tr>
<tr><td>10/02/19</td><td>16:37:18</td><td>00:10:41</td><td>284</td><td>48</td><td>190</td><td>122</td><td>16:47:59</td></tr>
<tr><td>10/02/19</td><td>18:14:02</td><td>00:09:04</td><td>279</td><td>13</td><td>219</td><td>163</td><td>18:23:06</td></tr>
</tbody>
</table>

ISSPasses.html in the Public Dropbox Downloads folder has been updated too

--
73

Hon Sec SBARC
for and on behalf of SBARC
https://www.sbarc.co.uk

Andy G7KNA
 

Good job, if I do say so myself!

--
Andy Jenner G7KNA
www.g7kna.co.uk ( http://www.g7kna.co.uk )
https://twitter.com/g7kna
www.linkedin.com/in/andywjenner ( http://www.linkedin.com/in/andywjenner )

 

Ladies and gentlemen,

ARISS Russia is planning Slow Scan Television (SSTV) image transmissions on 145.800 MHz FM from the International Space Station between Thursday April 11 2019 and Sunday April 14 2019.

As usual I have prepared a pass prediction list based on the Clubhouse which you can download from the following public folder:


The transmissions begin Thursday, April 11, 2019 around 18:00 UTC and run continuously until approximately 18:00 UTC on Sunday, April 14, 2019.

This event uses a computer in the ISS Russian Segment, which stores images that are then transmitted to Earth using the ARISS amateur radio station located in the Service Module which employs the Kenwood TM D710E transceiver.

Once the event begins the transmissions will be broadcast at 145.800 MHz using the PD-120 SSTV mode.

Ham radio operators and other radio enthusiasts are invited to post the images they receive at
http://www.spaceflightsoftware.com/ARISS_SSTV/index.php

Moreover, on request, ARISS SSTV Award Manager Slawek SQ3OOK will provide an SSTV Award, details at
https://ariss.pzk.org.pl/sstv/

To submit a request, please follow this procedure:
1. Load your decoded images on the page:
https://www.spaceflightsoftware.com/ARISS_SSTV/submit.php

2. Fill in the application form on the website:
https://ariss.pzk.org.pl/sstv/

Please note that the event is dependent on other activities, schedules and crew responsibilities on the ISS and is subject to change at any time.

Please check the following for news and the most current information:
AMSAT-BB
https://www.amsat.org/mailman/listinfo/amsat-bb



You can use online radios to receive signals from the International Space Station: 
SUWS WebSDR located Farnham near London
http://farnham-sdr.com/
R4UAB WebSDR located European Russia
http://websdr.r4uab.ru/

I have previously provided details of how to receive these images and these instructions can be found in earlier posts in this Groups.io thread on the public discussion board run by the Club.

I won't repeat the instructions here, if you haven't already read them you're unlikely to do it this time and if you do need to refresh yourself then the earlier posts are still readable and perfectly adequate for this operation too.


73

Andy
--
Andy Jenner G7KNA BEng CEng MICE
Hon. Sec.
for and on behalf of South Bristol Amateur Radio Club
Novers Park Community Centre
Rear of 122 - 124 Novers Park Road
Bristol BS4 1RN
http://www.sbarc.co.uk
Follow us on Twitter http://twitter.com/G4WAW


 

ARISS - RS0ISS - SSTV activity

ARISS Russia is planning SSTV test transmissions.
 
A Russian MAI-SSTV event is planned from the International Space Station for 

Monday, July 29 2019 from 13:15 - 21:25 UTC 
Tuesday July 30 2019 from 13:50 - 19:50 UTC.
 
Transmissions are expected to be at 145.800 MHz FM in SSTV mode PD120.
 
This session is the routine MAI-75 activity that is only active for a few orbits. It appears that the most of the world (except N. America) will get a shot during the two day run.

I've completed the usual orbital predictions based on the Clubhouse which will be reasonably close for most members although the further you are from the Clubhouse then the greater the error will be.

There are plenty of links and explanations from earlier in this thread that can be used as "How To" resources so I won't repeat them here this time.

The various .PDF, .HTML and .ODF spreadsheet can be found in the Public DropBox folder here:

https://www.dropbox.com/sh/i8jdu3xmmcagcir/AAAUHj3GC4qtxYfb693ui2G5a?dl=0

--
73

Hon Sec SBARC
for and on behalf of SBARC
https://www.sbarc.co.uk

 

Two ISS SSTV events during July 29 - August 4

ISS Pass predictions are calculated for the South Bristol Clubhouse which should be more or less applicable to most members.  the further away you are from the Clubhouse the greater the error

https://www.dropbox.com/sh/i8jdu3xmmcagcir/AAAUHj3GC4qtxYfb693ui2G5a?dl=0

ARISS Russia is planning Slow Scan Television (SSTV) image transmissions on 145.800 MHz FM from the International Space Station 
 
Below is the scheduled for the planned activation of SSTV from the ISS. The first session is the routine MAI-75 activity that is only active for a few orbits. It appears that the most of the world (except N. America) will get a shot during the two day run. Some lucky operators along the east coast of North America should get a pass on July 29.
 
Inter-MAI-75 activity
(July 29) GMT 210/13:15 – SSTV activate
(July 29) GMT 210/21:25 – SSTV power down
 
(July 30) GMT 211/13:50 – SSTV power up
(July 30) GMT 211/19:30 – SSTV shutdown
 
The second event will be a world wide event running from August 1 through August 4 and the schedule is: 
 
ARISS SSTV activity
(Aug 01) GMT 213/09:40 – SSTV activate
(Aug 02) GMT 214/14:00 – SSTV check
(Aug 04) GMT 216/18:15 – SSTV shutdown
 
This event uses a computer in the ISS Russian Segment, which stores images that are then transmitted to Earth using the ARISS amateur radio station located in the Service Module which employs the Kenwood TM D710E transceiver.
 
It is anticipated that the SSTV mode used will be PD-120.
 
Please note that SSTV events are dependent on other activities, schedules and crew responsibilities on the ISS and subject to change at any time. You can check for updates regarding planned operation at:
ISS Ham https://twitter.com/RF2Space
 
Read the MagPi article Pictures from space via ham radio 
 
ISS SSTV info and links 

--
73

Hon Sec SBARC
for and on behalf of SBARC
https://www.sbarc.co.uk

 

ISS SSTV Oct 9 and 10
 
Russian cosmonauts are expected to activate Slow Scan Television (SSTV) image transmissions on 145.800 MHz FM from the International Space Station on Wednesday/Thursday, October 9/10.
 
This is the schedule for the planned activation of the MAI-75 SSTV activity from the ISS.
Oct 09 09:50-14:00 GMT
Oct 10 08:55-15:15 GMT

The usual table of passes is available at the Clubs Dropbox Folder which can be found here:
https://www.dropbox.com/sh/i8jdu3xmmcagcir/AAAUHj3GC4qtxYfb693ui2G5a?dl=0

Transmissions will be sent on 145.800 MHz FM in the SSTV mode PD-120. Once received, images can be posted and viewed by the public at http://www.spaceflightsoftware.com/ARISS_SSTV/index.php
 
ISS SSTV uses a Kenwood TM D710E transceiver which is part of the amateur radio station located in the Russian ISS Service Module.
 
Please note that SSTV events are dependent on other activities, schedules and crew responsibilities on the ISS and subject to change at any time. You can check for updates regarding planned operation at:
ISS Ham https://twitter.com/RF2Space
ARISS Status https://twitter.com/ARISS_status
ARISS SSTV Blog https://ariss-sstv.blogspot.com/
AMSAT Bulletin Board http://www.amsat.org/mailman/listinfo/amsat-bb
 
Read the MagPi article Pictures from space via ham radio
https://www.raspberrypi.org/magpi/pictures-from-space-via-ham-radio/
 
ISS SSTV info and links https://amsat-uk.org/beginners/iss-sstv/
--
73

Hon Sec SBARC
for and on behalf of SBARC
https://www.sbarc.co.uk

Andy G7KNA
 

Tried to get the 13:39 UTC pass from the works QTH car park yesterday (09/10/2019).

Not successful I'm afraid. I heard a very weak signal for possibly 3 or 4 minutes of the pass but was unable to decode anything this time.

Works QTH location is less than ideal being at low altitude and surrounded by manmade and natural topographic obstructions. 63 degrees above the horizon ought to have been viable at the peak of the pass so a bit disappointed especially as the same setup at a different location back in August did get a good partial image.

Debating whether or not to have a go at the 12:50 UTC and 14:27 UTC passes today. The first at 49 degrees maximum elevation isn't likely to be any better than yesterday but the second at 85 degrees is about as high as it can practically be.

I'll run a proper prediction for the Works QTH and see if I think either is viable. the 14:27 UTC pass is much closer to west - east than either yesterday or the 12:50 UTC pass which might be better for the works QTH location.

I'll report later with luck.

73
--
Andy Jenner G7KNA
www.g7kna.co.uk ( http://www.g7kna.co.uk )
https://twitter.com/g7kna
www.linkedin.com/in/andywjenner ( http://www.linkedin.com/in/andywjenner )

Andy G7KNA
 

Wasn't able to be operational during the 12:50 UTC pass due to attending a CPD event in house.

Still have the 14:27 UTC pass assuming transmissions are still occurring

73
--
Andy Jenner G7KNA
www.g7kna.co.uk ( http://www.g7kna.co.uk )
https://twitter.com/g7kna
www.linkedin.com/in/andywjenner ( http://www.linkedin.com/in/andywjenner )

Andy G7KNA
 

Wasn't able to be operational for the 14:27 UTC pass either, working for a living sure restricts your free time!

--
Andy Jenner G7KNA
www.g7kna.co.uk ( http://www.g7kna.co.uk )
https://twitter.com/g7kna
www.linkedin.com/in/andywjenner ( http://www.linkedin.com/in/andywjenner )