Create a WCS FrameSet from a SPECX file ATL_WCSPX
"
JFREST(1)"
- _INTEGER "
RA_DEC(1)"
- _DOUBLE "
RA_DEC(2)"
- _DOUBLE "
DPOS(1)"
-
_DOUBLE "
DPOS(2)"
- _DOUBLE "
IDATE"
- _CHAR "
ITIME"
- _CHAR "
LSRFLG"
- _INTEGER "
V_SETL(4)"
- _DOUBLE "
JFCEN(1)"
- _INTEGER "
JFINC(1)"
- _INTEGER "
IFFREQ(1)"
-
_DOUBLE
In addition, the KeyMap may contain an item "
CENTRECODE"
(_INTEGER) that specifies the
co-ordinate system to which the RA_DEC and DPOS values refer. It may take any of the following
values:
1 : AZEL 4 : RD (geocentric apparent RA and Dec) 6 : RB (FK4 1950 RA and Dec) 7 : RJ (FK5 2000 RA and Dec) 8 : GA (galactic longitude and latitude)
An error is reported if any other value is supplied for CENTRECODE. If CENTRECODE is missing a value of 6 (FK4 B1950) is assumed.
"
CELLSIZE(1)"
- _DOUBLE "
CELLSIZE(2)"
- _DOUBLE "
POSANGLE"
- _DOUBLE
In addition, the KeyMap may contain an item "
CELLCODE"
(_INTEGER) that specifies
the co-ordinate system to which the CELLSIZE and POSANGLE values refer. It may take
any of the values listed for CENTRECODE in the "
KM1"
argument description above. If
CELLCODE is missing a value of 6 (FK4 B1950) is assumed.
Various assumptions are made about the meaning of several items in the SPECX extensions. These are described in the code comments.
Double Sideband is always assumed