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

Array parameters May 2016
(Mar 21 - May 17)

Main parameter file: laboca-2016-06.rcp

laboca-2016-06.rcp is the RCP file of the first cooling down cycle of LABOCA 2016. Four beam maps were selected as the most representative and reliable maps of the period (7575,13044,14839,22827). Beam map #14839 was observed at high elevation (73 deg) but is still good enough to be considered to combine.

Individual scans

Scan #Date Parameter fileArray plotIndividual channel maps
7575 2016-03-28T04:41 Mars_7575_Laboca.rcp array_7575.pdf beams_7575.pdf
13044 2016-04-13T04:38 Mars_13044_Laboca.rcp array_13044.pdf beams_13044.pdf
14839 2016-04-22T03:36 Mars_14839_Laboca.rcp array_14839.pdf beams_14839.pdf
22827 2016-05-13T04:05 Mars_22827_Laboca.rcp array_22827.pdf beams_22827.pdf

Notes on individual channels

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

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 and are considered bad.
114, 116, 117, 118, 119, 120, 126, 128, 129, 130, 131, 132, 133, 134, 141, 147, 148, 152, 153, 154, 155, 156 Channels located in group 5 / cable L. These channels don't show astronomical signal (factor 20 below normal) and are considered bad.
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 don't show astronomical signal and/or cross-talk and are considered bad.
6, 45, 170, 199, 204, 206, 208, 211, 213, 219, 228, 241, 309 Bad channels, not showing any astronomical signal or very low signal levels, unconnected to groups 4, 5, or 7 above.

Channels flag file

Current file name: channel_flags-2016-04.boa,

"Not working channels list" updated 2016-04-13.


# 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 ]
# Bad channels (no/low signal or very high noise)
bad = [ 6,  45,  81,  82,  83,  84,  85,  86,  89,  90,  91,  92,  93,  94,
       96, 114, 116, 117, 118, 119, 120, 126, 128, 129, 130, 131, 132, 133,
      134, 136, 141, 147, 148, 152, 153, 154, 155, 156, 159, 160, 170, 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, 241, 309]