Import

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8.3.2 Import

Data can be loaded into ASAP by using the scantable function which will read a variety of recognized formats (RPFITS, varieties of SDFITS, the CASA Measurement Set, and NRO data format). For example:

CASA <1>: scans = sd.scantable(’OrionS_rawACSmod’, average=False)
Importing OrionS_rawACSmod...

Use the summary function to examine the data and get basic information:

CASA <8>: print scans.summary()
--------------------------------------------------------------------------------
Scan Table Summary
--------------------------------------------------------------------------------
Project:       AGBT06A_018_01
Obs Date:      2006/01/19/01:45:58
Observer:      Joseph McMullin
Antenna Name:  GBT@GREENBANK
Data Records:  512 rows
Obs. Type:     OffOn:PSWITCHOFF:TPWCAL
Beams:         1
IFs:           8
Polarisations: 2   (circular)
Channels:      8192
Flux Unit:     K
Abscissa:      Channel
Selection:     none

Scan Source         Time range                           Int[s] Record SrcType FreqIDs MolIDs
       Beam  Position (J2000)
--------------------------------------------------------------------------------
  20 OrionS         2006/01/19/01:45:58.0 - 01:47:58.2   30.03     64  [PSOFF, PSOFF:CALON] [0, 1, 2, 3] [0]
       0      05:15:13.5 -05.24.08.6
  21 OrionS         2006/01/19/01:48:38.0 - 01:50:38.2   30.03     64  [PSON, PSON:CALON] [0, 1, 2, 3] [0]
       0      05:35:13.4 -05.24.07.8
  22 OrionS         2006/01/19/01:51:21.0 - 01:53:21.2   30.03     64  [PSOFF, PSOFF:CALON] [0, 1, 2, 3] [0]
       0      05:15:13.6 -05.24.08.5
  23 OrionS         2006/01/19/01:54:01.0 - 01:56:01.2   30.03     64  [PSON, PSON:CALON] [0, 1, 2, 3] [0]
       0      05:35:13.4 -05.24.08.1
  24 OrionS         2006/01/19/02:01:47.0 - 02:03:47.2   30.03     64  [PSOFF, PSOFF:CALON] [4, 5, 6, 7] [1]
       0      05:15:13.5 -05.24.08.5
  25 OrionS         2006/01/19/02:04:27.0 - 02:06:27.2   30.03     64  [PSON, PSON:CALON] [4, 5, 6, 7] [1]
       0      05:35:13.4 -05.24.08.1
  26 OrionS         2006/01/19/02:07:10.0 - 02:09:10.2   30.03     64  [PSOFF, PSOFF:CALON] [4, 5, 6, 7] [1]
       0      05:15:13.5 -05.24.08.4
  27 OrionS         2006/01/19/02:09:51.0 - 02:11:51.2   30.03     64  [PSON, PSON:CALON] [4, 5, 6, 7] [1]
       0      05:35:13.3 -05.24.08.1
--------------------------------------------------------------------------------
FREQUENCIES: 4
   ID  IFNO   Frame   RefVal          RefPix Increment      Channels POLNOs
    0    0     LSRK   4.5489351e+10 4095.5       6104.233      8192  [0, 1]
    1    1     LSRK   4.5300782e+10 4095.5       6104.233      8192  [0, 1]
    2    2     LSRK   4.4074926e+10 4095.5       6104.233      8192  [0, 1]
    3    3     LSRK   4.4166212e+10 4095.5       6104.233      8192  [0, 1]
    4   12     LSRK   4.3962123e+10 4095.5      6104.2336      8192  [0, 1]
    5   13     LSRK   4.2645417e+10 4095.5      6104.2336      8192  [0, 1]
    6   14     LSRK   4.1594977e+10 4095.5      6104.2336      8192  [0, 1]
    7   15     LSRK    4.342282e+10 4095.5      6104.2336      8192  [0, 1]
--------------------------------------------------------------------------------
MOLECULES:
   ID   RestFreq          Name
    0   [4.54903e+10] []
    1   [4.3963e+10] []
--------------------------------------------------------------------------------

8.3.2.1 General descriptions
8.3.2.2 Handling ALMA data

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