Tonight I tested the turnstile antenna and Airspy on the Meteor-M N2 LRPT downlink signal. It was a good, high elevation pass and it looks like the signal is strong enough to decode the transmitted images.
Shortly after the Meteor-M pass there was a very low elevation NOAA-15 pass. To my surprise, I could follow the signal through the whole pass and it might even have been decodable. I did not record it so I do not know for sure.
It looks like the antenna is performing very well 🙂