Calibration checklist
                                                   DSN       GBT
System temperature:

Measure system temperatures                   


Pointing:

Do boresights on radio sources near Mercury 

Do boresights on Mercury 

Check smooth tracking on non-sidereal source

Read encoder positions on a whole minute.  
Verify that positions are within 3 millidegrees
of ephemeris prediction.

Mercury:

Do on-off on Mercury, measure Tsys increase


Receiver chain:

Inject a pure tone leakage signal at the 
front-end, record with data-taking system, 
and take power spectrum at high resolution.