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Robot36 - SSTV Image Decoder?
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You might also be able to use the free Android app Robot36 and hold your phone mic close to the speaker output on your PC.
I haven't tested this method but it may be simpler than trying to receive/decode the SSTV signal all on the PC (especially since KSP 64-bit can be sort of a resource hog).
https://play.google.com/store/apps/details?id=xdsopl.robot36&hl=en
You could make them yourself.. Find a WebSDR where the ISS will pass overhead and tune into it's VHF frequency. You can use Android apps like Robot36 to decode it holding up to speakers with sound from WebSDR.
So I made an image to send out on 2 meters sstv, and I thought I had done everything right. I encoded the image using this encoder on the VR2W0A blog to robot 36 and did a test decode using the Robot36 app for Android. While the image is perfectly readable, the colors are way off. I did a test of the app on a test PD240 image and it came out fine, so I do not think it is the app. I was wondering if this was simply a limitation to the color bit depth of the Robot36 codec, or if there was something wrong with the encoder I used. If so, what are some better options?
How important is it to compensate doppler shift ?
Can i just stay on 145.8MHz all the time ?
I have heard that there are many sstv decoders which compensate it automatically internally. Is the Robot36 App one of them ?
If you've got a phone then you can use any app which supports decoding in Scottie2 mode.
Doesn't look like there's a free app for iOS, but for Android there's the Robot36 app.
Monitor 145.800mhz
Wait for the ISS to pass over your location
Decode using something like this https://play.google.com/store/apps/details?id=xdsopl.robot36&hl=en_US
Although I think they were only transmitting for 3 days, so you might not be able to receive SSTV from them.
This one for Android auto detects, too.
Use this one to encode and you can send different modes and listen to them.
Tune to 145.8MHz while the ISS is overhead and you should see a constant signal. If there's nothing there, wait about 2 minutes for the next image to start. Once you have the signal, it can be decoded using something like MMSSTV, MultiScan 3B or even Robot36 for Android. Edit: They're using SSTV mode PD120.
You'll generally get better results with a directional antenna like the one I used but it is possible to receive signals from the ISS with an omnidirectional antenna. The one that comes with the dongles from China isn't all that good, but the telescopic one bundled with the rtl-sdr.com v3 dongle is much better.
https://play.google.com/store/apps/details?id=xdsopl.robot36
I hope this Wil will be useful for you. Best 73
Because we're not transmitting, no license is needed to receive SSTV transmissions from the ISS!
Any FM radio capable of receiving 145.800 MHz should work fine. You do not need some super special antenna to receive the ISS - it's plenty "loud" enough to be heard with a modest rubber duck (though better antennas will provide clearer reception).
Turn off squelch to be sure you can hear the signal as the ISS is first coming up off the horizon.
Use a site like N2YO.com to determine when the next ISS pass is going overhead - the higher the max altitude the better. Higher passes mean a longer amount of time to copy the image being transmitted.
Use an app on your smart phone (I use BlackCat SSTV for iOS) (Robot36 for Android).
Open the app and set to PD-120. Hold the phone up to the speaker on your radio and adjust the volume of the radio as needed. (An audio cable from the phone to radio would provide less noise in the decoded image, but isn't absolutely necessary.)
If you don't hear anything at first, check the frequency and be patient, it may be between transmissions. Also check your squelch, antenna connection, time of the scheduled pass (are you too early/too late?), etc.
If relying on a rubber duck antenna, remember the signal comes into the antenna on the long side of the antenna - not the tip. If you know the path the ISS will be flying over, position your radio so it is perpendicular to the path going overhead. You may need to adjust the angle/direction of the antenna slightly during the pass.
If you successfully receive and decode an image, upload it on this site:
https://www.spaceflightsoftware.com/ARISS_SSTV/index.php
It's also handy to go there to see what sort of image you might be receiving during your pass.
If you have an android phone, install this and just hold it up next to the speaker: https://play.google.com/store/apps/details?id=xdsopl.robot36&hl=en
Can even use Android apps to decode the webSDR SSTV transmissions, captured my first ISS SSTV using that app and a 5R held up to phone.
I used Robot36 Android App. Just hold the mobile next to the radio and let it listen to the whistles.
There are apps that'll do the decode right on the phone, too. I use Robot36 on my Android phone
Robot36 SSTV encoder/decoder https://play.google.com/store/apps/details?id=xdsopl.robot36
Android; https://play.google.com/store/apps/details?id=xdsopl.robot36
Windows; https://www.qsl.net/on6mu/rxsstv.htm
Linux/BSD etc; https://github.com/xdsopl/qsstv
It's not working for me at the moment but might work for you. Despite it's name it decided many different formats. https://play.google.com/store/apps/details?id=xdsopl.robot36
Download and install this app on your phone: Robot 36 SSTV Image Decoder. Open the app and play the video.
https://play.google.com/store/apps/details?id=xdsopl.robot36
The Robot36 app allows you to choose PD120.
I Encoded this using my phone.
An app used for ham radio SSTV receiving and decoding. You can learn more about it here
Robot36 on the android play store.
The song used as audio sample is: Antonio Vivaldi- The Four Seasons- Summer- Presto
That's some dirty tubing...
Use https://play.google.com/store/apps/details?id=xdsopl.robot36 To check it out on your phone.
The app is not mine! It's Robot36
There should be 5 tapes, You can use this android program called Robot36 https://play.google.com/store/apps/details?id=xdsopl.robot36&hl=en to decode the tapes.
Here's a free Android sstv app https://play.google.com/store/apps/details?id=xdsopl.robot36 there are a few others just search the play store.