[amsat-bb] Re: CP4 telemetry May 13, 2007

Keith McCabe kmccabe at calpoly.edu
Sun May 13 18:47:46 PDT 2007

> I observe that the frequency is higher on the day (sat in sunlight)  
> than in the night. The difference is abt. 500 Hz from the nominal  
> 437.322 MHz (USB).
> Can someone share this experience?

Hi Mike,

We've observed a similar difference here at Cal Poly.  The  
satellite's frequency has always been pretty sensitive to  
temperature.  It was calibrated at room temperature (~23 C), which  
probably accounts for the .322 vs .325.

Keith McCabe, KI6CWF

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