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

Array parameters August 2010 (01/08-30/08)

LABOCA was not used during the MPIfR time block in July. It was cooled down during the last days of July and ready to use on 1st of August.

Main parameter file: laboca-2010-08.rcp

Individual scans

Scan #Date Parameter fileArray plotIndividual channel maps
52569 2010-08-01T18:13 Mars_52569_Laboca.rcp array_52569.pdf beams_52569.pdf
57965 2010-08-18T06:33 Uranus_57965_Laboca.rcp array_57965.pdf beams_57965.pdf
60044 2010-08-23T06:20 Uranus_60044_Laboca.rcp array_60044.pdf beams_60044.pdf
60656 2010-08-25T04:18 Uranus_60656_Laboca.rcp array_60656.pdf beams_60656.pdf
62653 2010-08-30T16:50 Mars_62653_Laboca.rcp array_62653.pdf beams_62653.pdf
62663 2010-08-30T17:55 Mars_62663_Laboca.rcp array_62663.pdf beams_62663.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 show either cross-talk (varying level) with channel 136, or don't show anything. We consider them as bad. Channels 82, 83, 85, 86, and 136 are bad in any case. Note that some variability is observed for these channels. Check your data to verify if they are 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, 114, 204, 208, 213, 228, 246, 257, 309 Bad channels, not showing any astronomical signal or very low signal levels, unconnected to groups 4 or 7 above. The channels 204, 246, and 257 are variable and may be usable.
241 No proper signal. Picks up signal from channels 248 (strong) and 296 (weak).

channel_flags-2010-08.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,  81,  82,  83,  84,  85,  86,  89,  90,  91,  92,  93,  94,  96,
       114, 136, 159, 160, 177, 179, 180, 182, 183, 184, 185, 191, 192, 201,
       202, 203, 204, 205, 207, 208, 213, 217, 218, 220, 228, 246, 257, 309 ]