ISS SSTV Event - July 14th - 20th
- Thread starter dragon48
- Start date
eorange
♦RF Enabled Member♦
Glad to see not everyone has a perfect image. The static lines make it more real 😃
Elevation is only as good as when they key up ...lol
Watching passes on iss detector is like being at the horse races "come on! Come on! NO!!!" when transmissions start to far away
I have had a few passes up to 86 degrees and 10 minute but for reason unknown, just no signals at all, no nothing.
Other events I have picked up signals on my Baofeng.
2 SDR setups, nothing. not tracking software, both SDRs check OK. got me stumped.
Other events I have picked up signals on my Baofeng.
2 SDR setups, nothing. not tracking software, both SDRs check OK. got me stumped.
Token
Member
I have observed / recorded / decoded every pass except the first 2 in this series, I missed those. But of the 34 passes since then all have been active with SSTV. So I would suspect an issue on your end. So far it has all looked good here, with no really apparent technical issues on the ISS transmissions.
As normal, my biggest complaint (and it is pretty small) is the timing. This happens, to some extent, every SSTV event.
From my location, I have 7 more passes until the end of the event, and I have captured (made IQ recordings and have all the images from) 34 of the 36 passes since the start of the event. I believe I have captured every image sent, partial and complete, with the ISS over my horizon except for those first 2 passes. Meaning, as far as I can tell, I have not missed any opportunities or images in those passes.
So, having all of the images they have sent in 34 visibility events (74 images, partials and completes), I have multiple copies of every image from 01 to 08 (for example, I have 13 copies of image 06, partials and completes), but I only have 2 (one partial, one complete) copies of image 12, and one partial copy of image 09.
It is not that I have missed the decodes or anything, it is that in 34 passes and 74 decoded images (partial and complete) I have seen image 06 thirteen times, image 05 and 07 each twelve times, and there has been only one partial transmission of image 09 and no transmissions of image 08, 10, or 11.
Every ISS SSTV event goes like this for me, right down to the wire trying to get a copy of one image that I have not seen the entire event. I typically, eventually, get at least one copy of every image. But there have been past ISS SSTV events were the timing and orbits have made it a partial, or poor quality copy.
I understand why they time things the way they do, and there may be little that can be done to improve it, but it is a fact. I suspect it is the same for pretty much everyone.
T!
Token
Member
OK, now that the July 2025 ISS SSTV event is over (it actually ends ~6 hours from now, but there will be no more passes over my location until after the event is complete) I can share what I saw / found.
Note that none of the below is a complaint (even though it can sound a little whiny), just documenting what happened.
Over my location in the Mojave Desert of California there were 43 usable passes between 0945 z, July 14, and 0900z, July 20, I captured / recorded / decoded 41 of them, missing the first 2. I decoded 88 images total, counting both partials and complete.
Image # - # of receptions
01/12 - 3
02/12 - 7
03/12 - 7
04/12 - 12
05/12 - 13
06/12 - 17
07/12 - 17
08/12 - 8
09/12 - 2
10/12 - 0
11/12 - 0
12/12 - 2
Based on timing of the first pass I did receive, I believe the two passes I missed probably contained images 5, 6, and 7, although 4 may have been sent also.
So to the best of my knowledge, although I received 17 copies of each 06 and 07, images 10 and 11 were never sent while the ISS was above my horizon. Image 1 was sent 3 times, and image 09 and image 12 were both sent 2 times each. The two copies of 09 I received were both partials, both at the end of passes with the ISS dropping below the horizon before the image completed.
My results:
Image 01
image 02
image 03
image 04
image 05
Image 06
Image 07
Image 08
Image 09 (partial, but the best of the 2 copies I received)
Image 12
T!
Note that none of the below is a complaint (even though it can sound a little whiny), just documenting what happened.
Over my location in the Mojave Desert of California there were 43 usable passes between 0945 z, July 14, and 0900z, July 20, I captured / recorded / decoded 41 of them, missing the first 2. I decoded 88 images total, counting both partials and complete.
Image # - # of receptions
01/12 - 3
02/12 - 7
03/12 - 7
04/12 - 12
05/12 - 13
06/12 - 17
07/12 - 17
08/12 - 8
09/12 - 2
10/12 - 0
11/12 - 0
12/12 - 2
Based on timing of the first pass I did receive, I believe the two passes I missed probably contained images 5, 6, and 7, although 4 may have been sent also.
So to the best of my knowledge, although I received 17 copies of each 06 and 07, images 10 and 11 were never sent while the ISS was above my horizon. Image 1 was sent 3 times, and image 09 and image 12 were both sent 2 times each. The two copies of 09 I received were both partials, both at the end of passes with the ISS dropping below the horizon before the image completed.
My results:
Image 01
image 02
image 03
image 04
image 05
Image 06
Image 07
Image 08
Image 09 (partial, but the best of the 2 copies I received)
Image 12
T!
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I have no clue whats wrong with my setups, a lot of good passes, 2 SDRs on their own antenna plus my UV-K5 set up for this and I have received no signal at all, not even a point in the noise.
I get NOAA, OSCAR, and a few others. Makes no sense.
I get NOAA, OSCAR, and a few others. Makes no sense.
- Joined
- Jul 26, 2019
- Messages
- 122
Something is not right; I get partial images on an indoor discone. I only have a clear view to the southwest, so very few completes.
(tools: some Icom radio plugged directly into computer via USB, Black Cat SSTV)
Token
Member
I see you also did not receive images 10 and 11. And at a guess, you only got a couple receptions of image 09, forcing you to use a less good image. Your SDR and V Dipole seem to be working very well for you.
T!
For sure something wrong in your setup. They are very easily heard and seen on WF. I have pulled them in on SDR,FT-736R,FT-847,IC-7000, XTS 5K,KW TH-D72 & 74.
Seen 09 twice, on the 14th only, first time was the one I used, the second was further E/NE at a °4 elevation, only received 1/3 of the transmission
The v-dipole (built for weather sats) does quite well wikk ISS sstv, better then the qfh I use for weather sats
just a stupid question, but were you on the right frequency? 145.800
eorange
♦RF Enabled Member♦
Tune to 144.390. Can you hear a nonstop stream of APRS? This assumes you confirm there's active APRS in your area.
