Trying to receive UHF SSTV with CP22E VHF antenna

So far I have tried only SSTV reception on VHF at 145.800 MHz and I had received a few images earlier. This time the SSTV transmission from the International Space Station SSTV Expedition 74 Series 32 features “Cooperation in Space” was on UHF, at 437.550 MHz. The SSTV event concludes Tuesday May 12, 2026, 16:40 UTC. As my Moxon Yagi had ‘concrete’ block in the direction of maximum elevation, I tried to see if my CP22E VHF antenna working on third harmonic on UHF will work. CP22E antenna is in a suboptimal location beside my sloping roof and just 3m above my first floor balcony like terrace. It was a relatively low elevation pass with only about 24 degree maximum elevation. This attempt can be considered as a ‘successful failure’! Success is that I could get the signals a couple of times, while the failure was that the signals were not strong enough to give a good decode of the SSTV picture.

I was using Robot 36 app in my mobile phone in PD120 format. PD120 is for SSTV images transmitted over a period of 120 seconds or two minutes. The mic of the mobile phone was kept close to the loud speaker of my IC 2730A tuned to 437.555 MHz initially and later to 437.550 to track Doppler shift. You can hear the sound of the SSTV signals and simultaneously the Robot 36 app decoding a little bit of the picture. There is a better pass early morning tomorrow which might give me an opportunity to use my Moxon Yagi as it is in a different direction. Here is the video clip of my attempt.