IO-86 SSDV Experiment

1

For the past month, PRTeksat and AMSAT-ID have been running SSDV (Slow-Scan Digital Video) experiments via the IO-86 FM repeater. I’m creating this topic to document the event and preserve all the image transmissions and receptions so nothing gets lost. The main software used was ssdv2sat by @bali:

However, some participants also used other Android-based apps. To keep things organized, this thread will focus specifically on the IO-86 SSDV experiments. Feel free to share your received images, decode results, setups, or any tips :slightly_smiling_face:

image
image1080×1350 317 KB

1 Like
2

7th February 2026

Sender: YB0OSU

YB0OSU
YB0OSU240×320 6.49 KB

Sender: YC0AVJ
YC0AVJ
YC0AVJ320×176 4.04 KB

Sender: YB0OSU
YB0OSU 2
YB0OSU 2320×208 9.79 KB

8th February 2026

Sender:
YD0NXX

YD0NXX
YD0NXX240×144 7.67 KB

2 Likes
3

16 February 2026

Sender: YG4SLJ

YG4SLJ1:YG4SLJ:0:160:88:1:3_160x88_256bs
YG4SLJ1:YG4SLJ:0:160:88:1:3_160x88_256bs320×176 6.37 KB

3 Likes
4

from satno 7-8 february observations

1AMSAT0:AMSAT:2:208:256:4:0_208x256_256bs
1AMSAT0:AMSAT:2:208:256:4:0_208x256_256bs208×256 4.37 KB

1AMSAT0:AMSAT:0:320:256:4:0_320x256_256bs
1AMSAT0:AMSAT:0:320:256:4:0_320x256_256bs320×256 7.25 KB

1YG4SLJ1:YG4SLJ:0:160:88:1:3_160x88_256bs
1YG4SLJ1:YG4SLJ:0:160:88:1:3_160x88_256bs320×176 2.01 KB

YD0NXX-besar
YD0NXX-besar304×224 3.06 KB

YC0AVJ0:YC0AVJ:0:320:176:4:0_320x176_256bs
YC0AVJ0:YC0AVJ:0:320:176:4:0_320x176_256bs320×176 5.09 KB

from 16 february:

YG4SLJ1:YG4SLJ:0:160:88:1:3_160x88_256bs
YG4SLJ1:YG4SLJ:0:160:88:1:3_160x88_256bs320×176 6.37 KB

waterfall pattern:

image
image832×1603 591 KB

2 Likes
5

17 February 2026

Sender YD0BSK:

YD0BSK_JLB_img0_320x208_128bs
YD0BSK_JLB_img0_320x208_128bs320×208 1.78 KB

Sender YD0NXX:

YD0NXX_X14_img0_240x144_128bs
YD0NXX_X14_img0_240x144_128bs240×144 4.63 KB

*nb: both sent the image multiple times, YD0BSK has some QRM issues, YD0NXX’s image is complemented from each transmission with 93% decode.

1 Like
6

Waited for a long time did not receive anything :frowning:

7

Hi, where are you located at? Currently the FM transponder only turned on at near midnight once a day for SSDV experiment in South East Asia region.

Anyone on the footprint activation area are welcome to join :slight_smile:

Schedule can be seen here:

8

1-YC8UMD-0-320x176-1-3_256bs
1-YC8UMD-0-320x176-1-3_256bs320×176 5.43 KB

1-YD0BSK-0-320x208-1-3_128bs
1-YD0BSK-0-320x208-1-3_128bs320×208 1.6 KB

1-YD3ADN-0-320x208-1-3_256bs
1-YD3ADN-0-320x208-1-3_256bs320×208 5.5 KB

0-YB0OSU-0-256x192-2-0_256bs
0-YB0OSU-0-256x192-2-0_256bs256×192 4.65 KB

0-YG4SLJ-107-272x272-1-3_256bs
0-YG4SLJ-107-272x272-1-3_256bs272×272 5.7 KB

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Live decoding using SDR:

or replay from satnogs obs :slight_smile:
LAPAN-A2/IO86 observation on 2026-02-19 15:10 - 15:25 UTC

decode with this tool

73!

Lapan-A2 SSTV images
10

Not able to play. Kindly upload on someother server.

11

download here and here

some video can’t play on firefox browser, but can play on another browser like chrome.

12

Got it thanks. Need to get direwolf running on Arch linux. Any help?

1 Like
13

image
image862×274 14.8 KB

source

1 Like
14

Installed direwolf. What are the configuration settings?

15

just use direwolf.conf and follow the instruction in ssdv2sat github page

1 Like
16

this obs, ssdv send by amateur in indonesia reach india. good time

1 Like
17

2026-02-24 - 13:17 - 13:38 UTC

from: YG4SLJ

0-YG4SLJ-0-256x144-4-0_256bs
0-YG4SLJ-0-256x144-4-0_256bs256×144 6.69 KB

from YD3ADN:

1-YD3ADN-0-272x208-1-3_256bs
1-YD3ADN-0-272x208-1-3_256bs272×208 1.1 KB

some logs:

Summary 
 → YG4SLJ  | IMG 0              | Pkt       33 |      28 frags 
 → YG4SLJ  | IMG 0              | Pkt       34 |      29 frags 
 → YG4SLJ  | IMG 0              | Pkt        2 |      29 frags (Recovered FEC 3)
 → YG4SLJ  | IMG 0              | Pkt        4 |      29 frags 
 → YG4SLJ  | IMG 0              | Pkt        5 |      29 frags 
 → YG4SLJ  | IMG 0              | Pkt        6 |      29 frags 
 → D_2     | M7UovL             | OTHER #  311 | |6cX2Dxl&!Bm:u
 → YG4SLJ  | IMG 0              | Pkt        8 |      29 frags (Recovered FEC 3)
 → YG4SLJ  | IMG 0              | Pkt        9 |      29 frags (Recovered FEC 3)
 ✱ New from: YD3ADN, image: 0 (256 bytes/frag) (NON FEC) 
 → YD3ADN  | IMG 0              | Pkt        0 |    1/ 8 frags 
 → YD3ADN  | IMG 0              | Pkt        1 |    2/ 8 frags 
 → YD3ADN  | IMG 0              | Pkt        3 |    3/ 8 frags 
 → YD3ADN  | IMG 0              | Pkt        4 |    4/ 8 frags 
 → YD3ADN  | IMG 0              | Pkt        5 |    5/ 8 frags 
 → YD3ADN  | IMG 0              | Pkt        6 |    6/ 8 frags 
 → YD3ADN  | IMG 0              | Pkt        7 |    7/ 8 frags 
 → YD3ADN  | IMG 0              | Pkt        1 |    7/ 8 frags 
 → YD3ADN  | IMG 0              | Pkt        2 |    8/ 8 frags
2 Likes
18

Nitin (SatNOGS Network - Observation 13469123) is at a higher elevation.His satnogs station will pick IO 86. I am sorrounded by buildings.

1 Like
19

maybe if your elevation is possible, and you’re luck enough, you can try yourself send ssdv over io86. just use tx.py script that include in ssdv2sat.

image

btw tommorow until weekend, maybe you can try ssdv event. check time here

20

Is this from the observation that you shared??

No image file is created. Only .bin and .txt