posalias
NAME
posalias - Change one round alias for positions in the scn header
SYNOPSIS
posalias [ -mode {0,360 | -180,+180} ]
DESCRIPTION
Change one round alias for positions in the scn header.
For longitudal values, such as Az, l, RA, the command modifies
them between 0 and 360deg or between -180 and +180 deg.
For latitudal values, such as El, b, Dec, the command always modifies
them between -180 and +180 deg (actually between -90 and +90 deg).
You cannot modify some longitudal values are one mode and the others
in the other.
FILTER TYPE
.scn | posalias | .scn
OPTIONS
- -mode mode_value
- If mode_value is "principal" or "0,360",
all longitudal values are modifies to have values between
0 deg and 360 deg using a 360 deg ambiguity. The 360 deg is fixed to 0 deg.
- If mode_value is "zero_center" or "-180,+180",
all longitudal values are modifies to have values between
-180 deg and +180 deg using a 360 deg ambiguity. The -180 deg is fixed to +180 deg.
DEFAULTS
- -mode 0,360
SEE ALSO
headlist,
load,
save
BUGS
- Actually the command uses only the first character for the argument of -mode.
HISTORY
- ver.3.00
- 2003/1/31 T.Handa
MANUAL VERSION
2003/1/31 T.Handa
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