NG-23 / SilverSat

congratz. wondering what numbers behind the .jpg name:
190 34162 12 13 11 24 26.30

First time decoding SSDV from SilverSat, thanks @bali for the script! Kind of familiar with the script from encoding and decoding SSDV from IO-86 experiment a while ago :slight_smile:

A bit sad no transmission over here but I get it from this observation

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Finally i can handle it with a replay of my recording from SDR#

So great. Thanks to the whole team who makes this possible.

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SilverSat’s SSDV will be active for the following UTC times:

20-Jan-2026 5:38:00
1/20/2026 9:58:00
1/20/2026 21:00:38
21-Jan-2026 5:07
21-Jan-2026 6:18:00
1/21/2026 23:57:00
22-Jan-2026 4:11
22-Jan-2026 5:22:00
22-Jan-2026 19:36
23-Jan-2026 4:26:00
1/23/2026 8:47:00
1/23/2026 19:52:00
1/23/2026 21:27:00
24-Jan-2026 3:30:00
1/24/2026 18:57:00
1/24/2026 20:33:00
1/24/2026 22:46:00
1/25/2026 21:50:00
1/26/2026 18:39:00
1/26/2026 22:27:00
1/27/2026 1:05:00

Note: Date format is month/day/year by United States convention or day-month-year.

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Good question! The numbers should be upload time (190 seconds, i think for the photo only), file size (34k), current photo# (12), number of photos on disk (13), number sent (11), total photos (24), and disk_free (which probably means something to our payload team). These totals may reflect photos taken during integration testing, which I don’t believe were ever cleared out.

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20-Jan-2026 5:40-(#13242498), Thanks!

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Lesson(s) learned?

“Root Cause: Failure to use metric units in the coding of a ground software file, “Small Forces,” used in trajectory models”

Greetings from lost Mars Climate Orbiter

For UTC (which includes the date) the common notation is YYYY-MM-DDTHH:mm:ssZ according to ISO 8601, an international standard covering the worldwide exchange and communication of date and time-related data.

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Well, this time no any visible passes for my location, sorry.

hi @conrad26 @isaacschofe @davecopela , i try to generate wav audio file for same picture, modulated with IL2P and same baudrate 9K6, but with no delay. it take only 10 second to receive the full image. here the experiment:

everyone can test and play the audio
WP2XGW_24_195bs_audio_7VH_WP2XGW_195bs_0s.wav.zip (487.9 KB)

btw this this new script rx.py can auto detect the length of ssdv packets. so if your satellite send 195, 256, 77, even 64 byte / packet, it can auto decode flawless.. and the tx.py script can auto convert your large jpg/png/etc photo into optimize ssdv format .bin and modulated in wav without thinking :rofl:

im curious if there are satelitte operator with fm v/u transponder here want to test openly for amateur to send ssdv over sat using common handheld or fm transceiver

check here GitHub - hobisatelit/ssdv2sat: send and receive image (support jpg, png, etc) from satellite using handheld radio FM. (take advantage of IL2P + Reed Solomon + SSDV)

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Appreciate the teams efforts. Unfortunately, Silversat was not active over north Texas at 1/20/2026 21:00:38 UTC. Will continue to keep an eye out.

Good Hunting all,

Bob

N6RFM/5

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Apologies, Bob. The team was unable to send the schedule to SilverSat in time. I should have sent the next time you requested.

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No worries Isaac. Is there a schedule in place now?
Cheers,

Bob

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SSDV transmission was confirmed at 2026-01-21 06:21:13, but it was not decoded.

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“Here is our SSDV transmit schedule for the next 6 days. All times are UTC
1/22/26 4:11
1/22/26 5:22
1/22/26 19:36
1/23/26 4:26
1/23/26 8:47
1/23/26 19:52
1/23/26 21:27
1/24/26 3:30
1/24/26 18:57
1/24/26 20:33
1/24/26 22:46
1/25/26 21:50
1/26/26 18:39
1/26/26 22:27
1/27/26 1:05”

Official post made on Twitter/X (See HERE). Nitter HERE

Transmissions only available over the USA, Japan, Europe and South Africa.

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img 25 - black (note: 25 in dec = 19 in hex)

total 8 fragments

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As @Bali just found out - the image being broadcast on Jan 22 is black. We scheduled another image to be taken later today.

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2025-01-22 19:36 UTC rx in :greece: - CW beacon: SHAS

Callsign: WP2XGW
Image ID: 19
Resolution: 320x240
MCU blocks: 300
Sampling factor: 2x2
Quality level: 4
Read 8 packets

brightness increased

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wow. that is SUPERB

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the first contact silversat with UFO. :star_struck:

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