Multi frequency measurements . Rotary floor room temp vs hour of day.
System gain stability vs rotary floor room temperature.
Tsys variation during azimuth swings with dome at 19 degrees. The system runs 24 hours a day under computer control. There are 19 frequency bands that it steps through covering 10 Mhz to 10 Ghz. At each band a 1 minute peak hold is taken, read back by the computer, and then the setup is switched to the next band. Each frequency band is sampled once every 19 minutes.