KG-STV experimental Slow Scan from ISS - Feb 2022

On the 20th of February 2022 the ISS cross-band repeater rig - Kenwood D710GA - was 're-assigned' to run a digital Slow Scan TV experiment.

ARISS Europe - using the callsign ON4ISS - was uplinking the images from the amateur radio telebridge groundstation in Belgium.

A 1 minute and 40 second transmission was followed by a 1 minute and 20 second break.

KG-STV - a Minimum Shift Keying application designed by JJ0OBZ - was used to transmit a number of images over 5 passes  between 05:10 and 12:00 UTC whilst the ISS was over Europe.

KG-STV sends a 320 x 240 compressed JPEG in 15 lines of 20-off 16 x 16 pixel blocks. 2 frequencies are used ... 1800Hz for the ones and 1200Hz for the zeros. The signal only occupies 600Hz and so is very efficent.

It is possible for the receiving station to send a block repeat request to the transmitting station in order to have it resend missing, or corruped, blocks to produce a 100% image but unfortunately this would not be possible with this test.

My images were from the 08:31Z and 10:08Z - the two highest altitude passes. The 87 degree pass produced the better of the 2 images, but both are marred by missing and corrupted data.

 

  

 

 Passion SSTV - an amateur radio group in France - kindly created a certificate for the occasion!

 

 

 Click on the image to see it full size! 😉

 

Hopefully there will be more tests in the future!

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• NOAA Satellite Images - February 2024
  
• Brief catch-up - October 2022
• All round good HF opening
• Magic Band - 6m/50 MHz - 2 years of working and 1st USA multihop!
  
• Excellent conditions into Japan
  
• Contesting Results
  
• My 'local' 70cm FM repeater - GB3TD
• KG-STV experimental Slow Scan from the ISS - Feb 2022 - *NEW*
  
• Zachtek 80To10 200mW WSPR transmitter - *NEW*
• WSPR - Weak Signal Propagation Reporter - *NEW*
• Decoding RDS (Radio Data System) data from FM broadcast stations
• BARTG RTTY Sprint Contest - Jan 22/23 2022
  
• Little piece about QRP HF working in RadCom
  
• ADS-B - Decoding and displaying aircraft tracking data
• Decoding telemetry data from satellites
• ARISS ISS SSTV - 'Lunar Exploration' - Awards 
• ARISS Slow Scan TV Event - Dec 26/31 2021
• Weather balloons and radio sondes
  
• Receiving & decoding satellite telemetry data - Article
• FT modes - Operating Hints and Tips - Article
• PSAT - APRS and telemetry
• Scheduled AX.25 APRS contact
• SSTV awards - ISS
• First PSAT APRS contact
• SatGate update - from Nov 2020
• Setting up a satellite I-gate or SatGate
• Dr. Tony England - Challenger space shuttle SSTV 
• EQSL awards
• QSL cards including 1st DXCC and Satellite QSOs 

 

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Robin.

G8VVY/G4MRV/G2B

😆 🌈

6th May 2022 - 1st good 'Magic Band' Es lift of the season ....