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!
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!
! SDDL Name: WGUIDE_STARS.SDDL
!
! Purpose: This SDDL file defines the wguide_stars relation.
!
! Modification History:
!
! Date OPR Who Reason
! -------- ------- --- -------------------------------------------------
! 11/14/94 27329 RSL Original implementation
! 01/30/98 35442 sss Removed several unused fields.
! 02/07/98 35442 bao New GS_REQUEST command required to perform Guide
! Star Processing
! 11/02/98 37306 bao Delete remnants of GSSS interface from SPSS
! 02/02/99 37931 sfs Deleted est_acq_prob.
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!
LANGUAGE FORTRAN, SQL, C
INCLUDE ZSPSS_USER_TYPES.SDDL
RECORD GSTARS_TYPE
!------------------------------------------------------------------------------
!
! RECORD INFORMATION
!
!------------------------------------------------------------------------------
DESCRIPTION "The wguide_stars relation stores positional,
magnitude, and acquisition related data pertaining to
the guide stars of a potentially usable guide star
pair. Usage of the relation in SPSS programs is
described below.
The GS_REQUEST program populates the wguide_stars table.
When PMDB/UPDATE/TYPE=SU is run, it deletes observation
set specific data for observation sets other than the
first in a previous acquisition sequence. When this
occurs, it deletes records from wguide_stars.
The GS_REQUEST command uses the positional data for
centerlining. It uses many of the fields to identify
guide stars which may be used to create acquisition
datasets.
An Operations tool sets the filter position.
SMSG/SCHEDULE selects pair ids from the relation."
!------------------------------------------------------------------------------
!
! FIELD INFORMATION
!
!------------------------------------------------------------------------------
FIELD proposal_id
TYPE PROPOSAL_ID_TYPE
FORM
NAME "GSP"
LABEL "PROPOSAL ID"
END_FORM
END_FIELD
FIELD obset_id
TYPE OBSET_ID_TYPE
FORM
NAME "GSP"
LABEL "OBSET ID"
END_FORM
END_FIELD
FIELD version_num
TYPE VERSION_NUM_TYPE
FORM
NAME "GSP"
LABEL "VERSION NUM"
END_FORM
END_FIELD
FIELD gs_pair_id
TYPE GS_PAIR_ID_TYPE
RELATED_FIELDS "wggs_pairs.gs_pair_id" "wguide_stars.gs_id" "wguide_stars.fgs_id"
FORM
NAME "GSP"
LABEL "GS PAIR ID "
END_FORM
END_FIELD
FIELD gs_id
TYPE GS_ID_TYPE
RELATED_FIELDS "wguide_stars.gs_pair_id"
END_FIELD
FIELD fgs_id
TYPE C1
RELATED_FIELDS "wguide_stars.gs_pair_id"
DESCRIPTION "This field specifies the FGS to be used."
RANGE "1", "2", "3"
END_FIELD
FIELD preusage
TYPE C1
DESCRIPTION "'Y' means that this guide star has been used
successfully in the past.
'N' means that this guide star has not been used
successfully.
The field is not being used currently."
END_FIELD
FIELD nom_pos_ra
TYPE R8
UNITS "DEGREES"
DESCRIPTION "This is the nominal position in right ascension."
END_FIELD
FIELD nom_pos_dec
TYPE R8
UNITS "DEGREES"
DESCRIPTION "This is the nominal position in declination."
END_FIELD
FIELD plate_pos_ra
TYPE R8
UNITS "DEGREES"
DESCRIPTION "This is the plate nominal position in right ascension.
It is the nominal position of the guide star as
obtained from the plate specified by the guide star
catalog plate id, or from a plate overlap solution
if a plate overlap solution was required."
END_FIELD
FIELD plate_pos_dc
TYPE R8
UNITS "DEGREES"
DESCRIPTION "This is the plate nominal position in declination.
It is the nominal position of the guide star as
obtained from the plate specified by the guide star
catalog plate id, or from a plate overlap solution
if a plate overlap solution was required."
END_FIELD
FIELD pos_uncr_ra
UNITS "ARCSECONDS"
TYPE R8
DESCRIPTION "This is the positional uncertainty for the guide star
in right ascension."
END_FIELD
FIELD pos_uncr_dec
UNITS "ARCSECONDS"
TYPE R8
DESCRIPTION "This is the position uncertainty for the guide star
in declination."
END_FIELD
FIELD proper_ra
UNITS "ARCSEC/YEAR"
TYPE R8
DESCRIPTION "This field specifies the right ascension component of
proper motion at the guide star nominal position."
END_FIELD
FIELD proper_dec
UNITS "ARCSEC/YEAR"
TYPE R8
DESCRIPTION "This field specifies the declination component of
proper motion at the guide star nominal position."
END_FIELD
FIELD epoch
TYPE C15
DESCRIPTION "This field specifies the epoch for the nominal
position."
END_FIELD
FIELD parallax
UNITS "ARCSECONDS"
TYPE R8
DESCRIPTION "This field specifies the change in direction of the
star."
END_FIELD
FIELD magnitude
TYPE R4
DESCRIPTION "This field is the magnitude of the star, which is
specified in the FGS system."
UNITS "MAGNITUDE"
END_FIELD
FIELD single_spoil
TYPE R4
DESCRIPTION "This field specifies an estimate of the smallest
search radius for which there is a significant
probability that, before the guide star is
encountered, there lies within the search area at
least one spoiler object that has a magnitude of less
than the guide star upper magnitude setting.
A spoiler object is one which can be mistaken for the
guide star."
RELATED_FIELDS "wguide_stars.upper_magn"
END_FIELD
FIELD double_spoil
TYPE R4
DESCRIPTION "This field specifies an estimate of the smallest
search radius for which there is a significant
probability that, before the guide star is
encountered, there lies within the search area at
least two spoiler objects that have a magnitude of less
than the guide star upper magnitude setting.
A spoiler object is one which can be mistaken for the
guide star."
RELATED_FIELDS "wguide_stars.upper_magn"
END_FIELD
FIELD upper_magn
TYPE R4
DESCRIPTION "This is the threshold magnitude corresponding to
the acquisition probability. The stars with greater
magnitude uncertainty have dimmer thresholds."
UNITS "MAGNITUDE"
END_FIELD
FIELD filter_pos
TYPE C3
DESCRIPTION "This field is set by an Operations tool that is
executed at the time GSSELECT is run. The filter
is set based on the PCS mode for the scenario
being used by the observation set. Currently there are
only two modes: course track and fine lock. For for
coarse track the clear (CLR) filter is used, while for
finelock the pupil (APS) filter is used.
This field is only used if this star is
associated with a guide star pair that has been
selected for use in guide star acquisition."
RELATED_FIELDS "qbpcs_def.scenario_acq" "qbpcs_def.pcs_mode"
FORM
NAME "GSP"
LABEL "FILTER POS."
END_FORM
DISCRETE "APS", "CLR"
END_FIELD
FIELD dom_sub_flag
TYPE C1
DESCRIPTION "This flag indicates if the guide star is the
dominant or subdominant star in the pair.
'D' means this star is the dominant star in the pair.
'S' means it is the subdominant star.
FORM
NAME "GSP"
LABEL "D/S/N"
END_FORM
DISCRETE "D", "S"
END_FIELD
END_RECORD
!------------------------------------------------------------------------------
!
! RELATION DECLARATION
!
!------------------------------------------------------------------------------
RELATION wguide_stars
TYPE GSTARS_TYPE
DESCRIPTION "Guide Star Description Relation"
SUBSYSTEM_USING "SPSS"
FORM
NAME "GSP"
END_FORM
INDEX wguide_stars_1
TYPE clustered
FIELDS gs_pair_id
ATTRIBUTES ignore_dup_row
END_INDEX
INDEX wguide_stars_2
TYPE nonclustered
FIELDS proposal_id, obset_id, version_num
END_INDEX
INDEX wguide_stars_3
TYPE unique, nonclustered
FIELDS gs_id, proposal_id, obset_id, version_num, gs_pair_id
END_INDEX
END_RELATION
!------------------------------------------------------------------------------
!
! INSTANCE DECLARATION
!
!------------------------------------------------------------------------------
INSTANCE wguide_stars
GLOBAL
TYPE GSTARS_TYPE
END_INSTANCE
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