Next: 18.26.3 BEAM_GAP Up: 18.26 UV_CHECK Previous: 18.26.1 /FILE Contents Index
Identify channel ranges that share a common beam. The raw ranges are returned in variable BEAM_RANGES. Ranges narrower than BEAM_GAP are ignored in determining how UV_MAP derives the weight channels.
When BEAM_STEP = 0, UV_MAP will attempt to use a single common beam for all channels. For this purpose, edge channels will be dropped if they have weights differing from the majority. They will not be imaged.
Narrow contiguous ranges of channels with differing weights will not be considered in the beam derivation process when the range has less than BEAM_GAP channels. These later ignored ranges will be processed with the same weighting (and thus beam) than all other ones. They may thus have sub-optimal noise.
Default BEAM_GAP = 3
See HELP UV_CHECK BEAM_GAP and HELP UV_CHECK BEAM_RANGES for details.