Atacama Pathfinder EXperiment APEX
LABOCA Calibration
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Home > Instrumentation > LABOCA > LABOCA Calibration > Array parameters

Array parameters March 2012 (14/03-11/06)

LABOCA was cooled down mid-March to be ready for some technical observations and later for science time.

Main parameter file: laboca-2012-03.rcp

Individual scans

Scan #Date Parameter fileArray plotIndividual channel maps
9620 2012-03-16T03:52 Mars_9620_Laboca.rcp array_9620.pdf beams_9620.pdf
9665 2012-03-16T05:58 Mars_9665_Laboca.rcp array_9665.pdf beams_9665.pdf
11431 2012-03-21T05:59 Mars_11431_Laboca.rcp array_11431.pdf beams_11431.pdf
11824 2012-03-22T04:42 Mars_11824_Laboca.rcp array_11824.pdf beams_11824.pdf
11826 2012-03-22T05:09 Mars_11826_Laboca.rcp array_11826.pdf beams_11826.pdf
12756 2012-03-24T04:05 Mars_12756_Laboca.rcp array_12756.pdf beams_12756.pdf
12759 2012-03-24T04:33 Mars_12759_Laboca.rcp array_12759.pdf beams_12759.pdf
16291 2012-04-03T04:40 Mars_16291_Laboca.rcp array_16291.pdf beams_16291.pdf
35569 2012-05-24T10:07 Uranus_35569_Laboca.rcp array_35569.pdf beams_35569.pdf
38607 2012-06-03T04:48 Saturn_38607_Laboca.rcp array_38607.pdf beams_38607.pdf

Notes on individual channels

Note: Channels which are terminated with a resistor are not listed in the following table anymore.

Channel #Description
101, 103, 106, 110 Strong cross-talk: 101↔106 and 103↔110. 101 and 103 may be usable for point sources only.
81, 82, 83, 84, 85, 86, 89, 90, 91, 92, 93, 94, 96, 136, 159, 160 Channels located in group 4 / cable M. These channels usually don't show any astronomical signal. Channel 93 is variable and may be usable.
177, 179, 180, 182, 183, 184, 185, 191, 192, 201, 202, 203, 205, 207, 217, 218, 220 Channels located in group 7 / cable A. These channels mostly don't show astronomical signal and are considered bad.
6, 45, 114, 133, 199, 204, 206, 208, 211, 213, 219, 228, 309 Bad channels, not showing any astronomical signal or very low signal levels, unconnected to groups 4 or 7 above.
241 No proper signal. Picks up signal from channels 248 (strong) and 296 (weak).

channel_flags-2012-03.boa:

# 25 channels not connected to any bolometer
not_connected = [ 29,  33,  35,  40,  64,  66, 124, 135, 142, 144, 146, 151,
                 158, 189, 193, 195, 200, 224, 226, 284, 295, 302, 304, 306,
                 311 ]
# 20 channels with 1MOhm resistor
resistor = [  15,  16,  87,  88,  95, 139, 143, 145, 149, 150, 157, 178,
             181, 186, 187, 188, 190, 255, 310, 317 ]
# 2 channels sealed with an absorber
blind = [ 4, 163 ]
sealed = blind
# channels showing strong cross-talk
cross = [ 101, 103, 106, 110, 241 ]
# Bad channels (no/low signal)
bad = [ 6,  45,  81,  82,  83,  84,  85,  86,  89,  90,  91,  92,  93,  94,
       96, 114, 133, 136, 159, 160, 177, 179, 180, 182, 183, 184, 185, 191,
      192, 199, 201, 202, 203, 204, 205, 206, 207, 208, 211, 213, 217, 218,
      219, 220, 228, 309 ]