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Beam Offset Binary Table Format

The header will contain a table if data indicating the offsets of each beam relative to the selected beam. The format of the table is listed below.
NAME
This is an string name for the named beam. The convention used is that beam names which correspond to physical feeds are numeric, and 'virtual' beams begin with a letter. The letter 'C' is usually used to indicate the center of the receiver package.
BEAMXELOFFSET
Specifies the beam offset in cross-elevation relative to the tracking beam. Units are degrees.
BEAMELOFFSET
Specifies the beam offset in elevation relative to the tracking beam. Units are degrees.
SRFEED1, SRFEED2
When performing beam switching, the SRFEED1/SRFEED2 specify the sig and reference beam pair. Note: The accurracy of this statement is in question. It is unclear at this point how the data processing scripts use this information or whether it is in use at all.


Name Type Units
NAME 32A None
BEAMXELOFFSET 1D Degrees
BEAMELOFFSET 1D Degrees
SRFEED1 32A none
SRFEED2 32A none

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next up previous
Next: Primary Binary Table Column Up: gbtAntFits Previous: Primary Header Keyword Definitions
Joe Brandt 2014-01-07