Array parameters May 2008 (10/05-17/05)

Main parameter file: saboca-2008-05.rcp

Individual scans

Scan #	Date	Parameter file	Array plot	Individual channel maps
15426	2008-05-13T22:55	Mars_15426_Saboca.rcp	array_15426.pdf	beams_15426.pdf
15427	2008-05-13T23:03	Mars_15427_Saboca.rcp	array_15427.pdf	beams_15427.pdf
15437	2008-05-13T23:29	Mars_15437_Saboca.rcp	array_15437.pdf	beams_15437.pdf
15438	2008-05-13T23:37	Mars_15438_Saboca.rcp	array_15438.pdf	beams_15438.pdf
15442	2008-05-13T23:52	Mars_15442_Saboca.rcp	array_15442.pdf	beams_15442.pdf

Notes on individual channels

In SABOCAs first commissioning run during May 2008, most of the 37 channels were working properly. Also note that the output signal is negative (for technical reasons), thus the signal has to be inverted. Channel 21 and 25 show positive signal sometimes or always, respectively.

Channel #	Description
2	Cross-talk. Doesn't show corresponding signal, but picks up (low) signal from channel 9. Unusable.
13, 30	No astronomical signal. They are considered bad.
10, 24	Just noise. Channel 24 also picks up signal from channel 23. Unusable.
21	Variable (bad for scan 15427). Also positive signature part of the time. Check your data.
25	Variable. Positive signature, also cross-talk with channel 23. Unusable (at least for extended sources).
4, 6, 12, 14, 22, 23, 26, 28	Variable channels. They sometimes show high noise or spikes. Check your data, can be easily identified if bad.

channel_flags-2008-05.boa:

# Inverted channels:
def invertSomeChannels():
    for i in range(len(inverted)):
        num=inverted[i]-1
        data.Data[:,num] *= array(-1,'f')
inverted = range(1,25) + range(26,38)
invertSomeChannels()

# Bad channels (no signal or noisy)
bad = [  2, 10, 13, 24, 30 ]
# Variable channels - Check your data and add to bad if appropriate:
bad_maybe = [14, 21, 23, 25, 28 ]
# Channels which sometimes show spikes - despike and/or add to bad if appropriate:
spiky_maybe = [  4,  6, 12, 22, 26 ]
flagC(bad)

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