...
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
...
5%:
BMAJ = 3.401172359470E-05
...
BPA = -4.208995788542E+01
NAXIS1
...
=
...
1728
NAXIS2
...
=
...
1728
NAXIS3 = 1
NAXIS4 = 1
CRVAL1
...
=
...
8.228496247106E+01
CDELT1
...
=
...
-7.222222217153E-06
CRPIX1
...
=
...
8.650000000000E+02
CRVAL2
...
=
...
1.187020728400E+01
CDELT2
...
=
...
7.222222217153E-06
CRPIX2
...
=
...
8.650000000000E+02
CRVAL3
...
=
...
2.248650462272E+11
CDELT3
...
=
...
1.810101696316E+10
CRPIX3
...
=
...
1.000000000000E+00
May or may not be the same:
PIPEVER
...
=
...
'43130
...
(Pipeline-CASA56-P2-B)'
CASAVER
...
=
...
'5.6.2-3
...
'
Step-by-step guide
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