...
We can also attempt to define criteria where a product would be a new version of the same product. This would attempt to keep products where some metadata change by very small values due to heuristic adjustments within the imaging pipelines, but are not fundamentally different.
Fields that should be identical:
NAXIS
...
=
...
4
SPECMODE= 'cube '
TELESCOP=
...
'ALMA
...
'
DATE-OBS=
...
'2017-12-10T04:53:09.359999'
BTYPE
...
=
...
'Intensity'
OBJECT
...
=
...
'GW_Ori
...
'
BUNIT
...
=
...
'Jy/beam
...
'
...
/Brightness
...
(pixel)
...
unit
SPECSYS
...
=
...
'LSRK'
...
CTYPE1 = 'RA---SIN'
CUNIT1 = 'deg '
...
CTYPE3 = 'FREQ '
CTYPE4 = 'STOKES '
CUNIT4
...
=
...
'
...
'
RESTFRQ
...
=
...
2.305380000000E+11
Fields same within 0.25 arcsec:
CRVAL1 = 8.228496247106E+01
CRVAL2 = 1.187020728400E+01
Fields same within 0.5%:
CRVAL3 = 2.248650462272E+11
CDELT3 = 1.810101696316E+10
CRPIX3 = 1.000000000000E+00
NAXIS3 = 1
Fields
...
same
...
within
...
5%:
BMAJ = 3.401172359470E-05
...
BPA = -4.208995788542E+01
NAXIS1
...
=
...
1728
NAXIS2
...
=
...
1728
...
NAXIS3 = 1
NAXIS4 = 1
CRVAL1 = 8.228496247106E+01CDELT1
...
=
...
-7.222222217153E-06
CRPIX1
...
=
...
8.650000000000E+02
...
CDELT2
...
=
...
7.222222217153E-06
CRPIX2
...
=
...
8.650000000000E+02
...
CRVAL3 = 2.248650462272E+11...
CRPIX3 = 1.000000000000E+00May or may not be the same:
PIPEVER
...
=
...
'43130
...
(Pipeline-CASA56-P2-B)'
CASAVER
...
Step-by-step guide
...
Related articles
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ORIGIN = 'CASA 5.6.2-3 '