There are two ways of doing absortion measurements:
- Not moving the telescope;
paKo> source ABSORBER EQ2000 05:55:10.28 +07:24:25.4 LSR 0.0 FLUX 0.34 0.0 PROJECT CALIB
paKo> onf 20 32 -->Repeat this 4 times
- Moving the telescope;
Find at what elevations you want to do the measurements, then find a real source in the sky at such elevations, for example let take W3OH.
>grep W3OH pool.sou
W3OH EQ 2000 02:27:03.88 +61:52:25.5 LSR 0.0 FLUX 8.13 0.0 PROJECT CALIB
paKo> sou ABSORBER EQ 2000 02:27:03.88 +61:52:25.5 LSR 0.0 FLUX 8.13 0.0 PROJECT CALIB
paKo> bmap 240 240 4 4
paKo> start
Repeat this at the different elevations changing the coordinates!