#filename:	HETGperiod.rdb
#memo:	http://space.mit.edu/HETG/period/period.html
#
# This file is used to store/transfer HETG Calibration data.
#
#--------------------------------
# History information:
# created 8/4/97 dd
# modified 8/20/97 dd New XRCF spacing information
# modified 9/11/97 dd include as-installed clocking of
#                     HETG for flight (+46. arc seconds, from TRW).
# modified 9/17/97 dd HETG distance at XRCF set to 8782.8 (old value)
#                     for agreement with sub-assembly period data.
#--------------------------------
#
#.........Column definitions.....
# This rdb file lists several one-number
# products.  The rdb columns are therefore
# generic and self explanatory.
#
#.........Name definitions.......
# HEGp        Average period of the HEG gratings
# MEGp        Average period of the MEG gratings
# HETGrsX     HETG Rowland Spacing at XRCF
# HETGrsF     HETG Rowland Spacing in Flight
# HETGopenX   HETG opening angle at XRCF (HXDS coord.s)
# HETGopenF   HETG opening angle in Flight (ACIS coord.s)
# HETGclockX  HETG mean dispersion angle at XRCF
# HETGclockF  HETG mean dispersion angle in Flight
# HEGangleX   HEG dispersion angle w.r.t. y-axis, XRCF
# HEGangleF   HEG dispersion angle w.r.t. y-axis, Flight
# MEGangleX   MEG dispersion angle w.r.t. y-axis, XRCF
# MEGangleF   MEG dispersion angle w.r.t. y-axis, Flight
#................................
#
name	value	error	unit
S	N	N	S
HEGp	2000.81	0.05	Angstrom
MEGp	4001.41	0.10	Angstrom
HETGrsX	8782.8	0.50	mm
HETGrsF	8633.92	0.50	mm
HETGopenX	9.934	0.008	degrees
HETGopenF	9.934	0.008	degrees
HETGclockX	-0.225	0.05	degrees
HETGclockF	-0.225	0.05	degrees
HEGangleX	-5.19	0.05	degrees
MEGangleX	4.74	0.05	degrees
HEGangleF	-5.18	0.05	degrees
MEGangleF	4.75	0.05	degrees