next up previous contents
Next: The INSTFOS2 packet Up: Contents of the packets Previous: AUTOGUID packet   Contents

The INSTISIS packet

The INSTISIS packet lists the header information required for any observation with either of the arms of ISIS or with FOS. The header records required should be as follows:

CENWAVE = REAL               / Approx central wavelength (A)      *
LINESMM = REAL               / Number of lines/mm of the grating  *
DISPERSI= REAL               / Nominal dispersion (A/mm)          *
ISIANAMO= CHAR               / Position of anamorphotic lens
ISIHWAVE= CHAR               / Position of half-wave polarizer
ISIQWAVE= CHAR               / Position of quarter-wave polarizer
ISIDEKKE= CHAR               / Position of dekker
ISISLITU= CHAR               / Slit unit (long, multi or fibre)
ISISLITW= INTEGER            / Slit width (microns)
PAOFFSET= REAL               / Slit p.a. - tel. p.a. (degs)
ISIFCP  = CHAR               / Field-lens, calcite, polaroid or clear
ISIBFOLD= CHAR               / Position of blue fold
ISIRFOLD= CHAR               / Position of red fold
ISISARM = CHAR               / Data from red arm, blue arm or FOS ?
ISIFILTA= CHAR               / Name of filter A in ISIS arm      *
ISIFILTB= CHAR               / Name of filter B in ISIS arm      *
ISIHART = CHAR               / Configuration of Hartmann shutter *
ISICOLL = INTEGER            / Position of collimator (microns)  *
ISIGRAT = CHAR               / Name of grating                   *
ISITHETA= INTEGER            / Angle of grating (mdegs)          *
ISIBXDIS= CHAR               / Position of blue x disperser
ISITIGHT= CHAR               / Light tight ?
ISISDOOR= CHAR               / Status of slit door
ISICELL = CHAR               / State of grating-cell clamps      *
ISIGDOOR= CHAR               / Status of grating door
ISILID  = CHAR               / Status of ISIS lid
PAOFFSET= REAL               / Slit p.a. - telescope p.a. (degrees)


Craige Bevil