#filename:	LETGperiod.rdb
#memos: http://space.mit.edu/HETG/period/period.html
#       http://space.mit.edu/HETG/HETG_loc_at_xrcf.html
#       http://space.mit.edu/HETG/HETG_loc_in_flight.html
#
# This file is used to store/transfer LETG 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.
# modified 10/13/97 dd LETG version created.  LETG as-installed
#                     clocking is +57 arc seconds = +0.016 degrees
# modified 6/24/98 dd XRCF clocking angle changed to 0.006.
#                      (was -0.225 = HETG ave angle - oops!)
# updated 7/17/99 dd Changed Flight and XRCF Rowland spacings
#                      based on HRMA focal spacing.
#--------------------------------
#
#.........Column definitions.....
# This rdb file lists several one-number
# products.  The rdb columns are therefore
# generic and self explanatory.
#
#.........Name definitions.......
# LEGp        LEG average period
# LETGrsX     LETG Rowland Spacing at XRCF
# LETGrsF     LETG Rowland Spacing in Flight
# LETGclockX  LETG mean dispersion angle at XRCF
# LETGclockF  LETG mean dispersion angle in Flight
#................................
#
name	value	error	unit
S	N	N	S
LEGp	9912.16	0.99	Angstrom
LETGrsX	8788.76	0.50	mm
LETGclockX	0.006	0.05	degrees
LETGrsF	8632.31	0.50	mm
LETGclockF	+0.016	0.01	degrees