FMFITS

Summary

FMFITS

from astropy.io import fits
f = fits.open('sample_fmfits.fits')
f.info()

Filename: sample_fmfits.fits
No.    Name         Type      Cards   Dimensions   Format
0    PRIMARY     PrimaryHDU       4   ()
1    OBSINFO     BinTableHDU     38   4R x 9C      [3A, 3A, D, D, D, D, D, D, J]
2    FMLOLOG     BinTableHDU     27   1606R x 6C   [26A, 4A, L, D, D, D]
3    BACKEND     BinTableHDU     46   6420R x 17C   [J, 5D, D, D, D, D, D, J, J, J, D, D, D, 26A, 4A, 8A, 1024E]

PRIMARY HDU

PRIMARY HDU is a primary HDU which is essential to add at least a binary table HDU to a FITS. In FMFITS, PRIMARY HDU has no meaning and developer should not store any data in it.

Keyword	Type	Value	Description
SIMPLE	-	T	conforms to FITS standard
BITPIX	-	8	array data type
NAXIS	-	0	number of array dimensions
EXTEND	-	T	-

OBSINFO HDU

OBSINFO HDU is a binary table HDU which stores information of an observation in header part and information of each array of a spectrometer in data part. It also declares that the FITS is a FMFITS by FITSTYPE in header part. In FMFlow, its information is used to create an fmarray.

essential keywords

Keyword	Type	Value (example)	Description
EXTNAME	-	OBSINFO	-
FITSTYPE	-	(FMFITSv0.2)	-
TELESCOP	-	(NRO45m)	-
DATE-OBS	-	(YYYY-mm-ddTHH:MM:SS.sss)	-
OBSERVER	-	(Snoopy)	-
OBJECT	-	(Ori-KL)	-
RA	-	()	-
DEC	-	()	-
EQUINOX	-	(2000.0)	-

functions/classes using keywords

Keyword	Functions	Classes	Description

FMLOLOG HDU

Keyword	Type	Value	Description

functions/classes using keywords

Keyword	Functions	Classes	Description

BACKEND HDU

Keyword	Type	Value	Description

functions/classes using keywords

Keyword	Functions	Classes	Description

ANTENNA HDU

Keyword	Type	Value	Description

functions/classes using keywords

Keyword	Functions	Classes	Description