Array parameters July 2009 (03/07-07/07)
SABOCA was cold and in use between 3rd and 7th of July.
Because of the mounting of SABOCA in the Cassegrain cabin of APEX
and the very exposed position of its mirrors, the optical path was
seriously affected by some imperfections in the mirror mounting.
This leads to a very elliptical beam shape, with a beam size
much larger than expected.
A proper data handling would probably try to reduce the channels
individually and smooth to a common beam before combining the
individual channels, in order to obtain a proper flux calibration.
The mirror mounting problems were later identified and fixed before
the September 2009 SABOCA observing run started.
Main parameter file: saboca-2009-07.rcp
Individual scans
| Scan # | Date | Parameter file | Array plot | Individual channel maps |
|---|---|---|---|---|
| 38436 | 2009-07-03T11:51 | Mars_38436_Saboca.rcp | array_38436.pdf | beams_38436.pdf |
| 38437 | 2009-07-03T11:59 | Mars_38437_Saboca.rcp | array_38437.pdf | beams_38437.pdf |
| 38785 | 2009-07-04T13:01 | Mars_38785_Saboca.rcp | array_38785.pdf | beams_38785.pdf |
Notes on individual channels
All 37 channels of SABOCA are working fine. Between March 2009 and March 2010, all backend signals are inverted, which has to be taken care of during data reduction:
# Handle inverted channels (all): data.Data *= array(-1,'f')
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