=== How to proceed ===

Ideally the measurements should be done with the moving telescope to be as cloas as possible in the observation condition.

{{{
   > Pick-up a source  at the requested  elevation (see XEphem)
   pako> source G34.3 /grep /cat ihet
   >>> G34.3           EQ 2000  18:53:18.56  +01:14:58.2  LSR 0.0  FLUX 19.90 0.0 PROJECT CALIB
   pako> source ABSORBER EQ 2000  18:53:18.56  +01:14:58.2  LSR 0.0  FLUX 19.90 0.0 PROJECT CALIB
   pako> onf 8 80

for acceleration tests:
pako> accTest
}}}