SSTV images from International Space Station

ISS SSTV image on 2018-06-30 at 09:42 UTC
During the current weekend (June 29 - July 1) the ISS transmits SSTV signals on 145.800 kHz almost continuously. The operation was announced recently on most ham radio information sources, including AMSAT-UK blog

ISS SSTV image on 2018-06-30 at 09:46 UTC

The SSTV mode used is PD120, developed by Paul Turner, G4IJE and Don Rotier, K0HEO (SK) and is described in Classic SSTV.The mode is supported by MMSSTV version 1.13A, but it does not appear in the main mode menu; however if MMSSTV is set in Auto, it recognizes PD120 signals right away, even without an FSKID.

ISS SSTV image on 2018-06-30 at 11:16 UTC

Today I received three images, using my Icom IC-7100 tranceiver and a simple vertical antenna. I use standard FM in the widest bandwidth (FIL1, approximately 15 kHz) without any compensation for Doppler effect. Some image degradation is apparent in the first two image, which is caused by local intermodulation effects.

For ISS tracking I use Gpredict (GNU predict) v2.2.1 on a Linux Mint computer.

Further info:

1. AMSAT-UK: Receive SSTV from Space June 29-July 1 
2. ISS SSTV Reception Hints 

1 comment:

  1. The SSTV transmissions from RS0ISS resumed for the weekend July 6-8, 2018 on the usual frequency and mode (145.800, AFSK/FM, PD120). I noticed some improvement in picture framing (the entire callsign now is shown, etc.)