Usage of angularSeparationOfScans

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Reads an ms and computes the angular separation of each transition between scans, both in terms of great circle angle, and broken down by antenna axis. It computes the az, el using the casa measures frame with a default observatory of ALMA. See also angularSeparationOfFields.

Usage:

au.angularSeparationOfScans(vis='', scans=[], skipConsecutive=True, observatory='ALMA', verbose=False, forceVM=False)
  • scans: if not specified, compute for all scan boundaries; otherwise, only between the specified scans
  • skipConsecutive: if True, do not show scan boundaries where the field does not change (i.e. 0 separation)
  • observatory: the location on the Earth to use in the measures tool to convert from RA Dec to Az El
  • forceVM: the msmd tool will be used if available, setting forceVM will always use ValueMapping instead.

Example:

CASA <3>: au.angularSeparationOfScans('uid___A002_X609bf6_Xafe.ms')
                                      Angular separations
Scan slew         Field Names      on-the-sky (deg)  (arcsec)  dAz(deg) dEl(deg)
04-05 =     J1337-1257 to Titan            12.9223 =  46520.2  +16.094  +10.781
06-07 =          Titan to 3c273            33.2503 =   119701   -7.444  -33.213
08-09 =          3c273 to 3c279            10.3531 =    37271   -4.832   +9.628
09-10 =          3c279 to 3c273            10.3531 =    37271   +4.733   -9.768
10-11 =          3c273 to 3c279-2          10.3531 =    37271   -4.896   +9.539
11-12 =        3c279-2 to 3c273            10.3531 =    37271   +4.743   -9.757
13-14 =          3c273 to 3c279            10.3531 =    37271   -4.881   +9.560
14-15 =          3c279 to 3c273            10.3531 =    37271   +4.760   -9.735
17-18 =          3c273 to 3c279            10.3531 =    37271   -4.892   +9.539
18-19 =          3c279 to 3c273            10.3531 =    37271   +4.778   -9.707
21-22 =          3c273 to 3c279            10.3531 =    37271   -4.911   +9.502
22-23 =          3c279 to 3c273            10.3531 =    37271   +4.785   -9.692
25-26 =          3c273 to 3c279            10.3531 =    37271   -4.910   +9.492
26-27 =          3c279 to 3c273            10.3531 =    37271   +4.794   -9.670
29-30 =          3c273 to 3c279            10.3531 =    37271   -4.918   +9.465
30-31 =          3c279 to 3c273            10.3531 =    37271   +4.804   -9.644
33-34 =          3c273 to 3c279            10.3531 =    37271   -4.921   +9.444
34-35 =          3c279 to 3c273            10.3531 =    37271   +4.808   -9.624
37-38 =          3c273 to 3c279            10.3531 =    37271   -4.939   +9.392
38-39 =          3c279 to 3c273            10.3531 =    37271   +4.800   -9.620

-- ToddHunter - 2013-05-10
Topic revision: r1 - 2013-05-10, ToddHunter
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