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!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!
! SDDL Name: QBWINDOWS.SDDL
!
! Purpose: This SDDL file defines the qbwindows relation.
!
! Modification History:
!
! Date OPR Who Reason
! -------- ------- --- -------------------------------------------------
! 11/16/94 27329 RJS Original implementation. Documentation on window
! types were collected from the 'SPSS Windows'
! document written by S. Wissler.
!
! 09/27/96 32176 PAP Added critic_flg to the unique index qbwindows_1
! 10/18/96 32176 MRB Changed file format so tools worked properly
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!
LANGUAGE FORTRAN, SQL
INCLUDE ZSPSS_USER_TYPES.SDDL
RECORD QBWIND_TYPE
!------------------------------------------------------------------------------
!
! RECORD INFORMATION
!
!------------------------------------------------------------------------------
DESCRIPTION "This relation stores the start and end times of
windows that are read into the C&C list by the command
CCLIST/CREATE and used by the scheduling process to
restrict the times when observation set and alignment
level activities can be scheduled.
These windows are generated by the command
PMDB/UPDATE/TYPE=SU and are classified into the
following categories or window types:
US - User Supplied Windows
TV - Target Visibility
SN/SO - Normal and Off-normal Windows
RN/RO - Guide Star Restricted Normal
and Off-normal Windows
DN/DO - Derived Normal and Off-normal Windows
PC - Phase Critical Windows
MT - Moving Target Windows
Constraints used by PMDB/UPDATE to generate the
windows are retrieved from the PDB relation
widcr_parms, the GS acquisition data relation WGACQUIS,
and the observation set data relation QBS_OBSET. In
addition, ST roll constraints are obtained from the
PDB namelist file WONMRL.NML."
!------------------------------------------------------------------------------
!
! FIELD INFORMATION
!
!------------------------------------------------------------------------------
FIELD proposal_id
TYPE PROPOSAL_ID_TYPE
FORM
NAME "BWD"
LABEL "PROPOSAL ID"
END_FORM
END_FIELD
FIELD obset_id
TYPE OBSET_ID_TYPE
FORM
NAME "BWD"
LABEL "OBSET ID"
END_FORM
END_FIELD
FIELD version_num
TYPE VERSION_NUM_TYPE
FORM
NAME "BWD"
LABEL "VERSION NUM"
END_FORM
END_FIELD
FIELD window_type
TYPE C2
DESCRIPTION "This field specifies the window type, where
'US' = user supplied window. US windows are supplied
by the user as time intervals over which an
observation must be done. These windows are
considered to be time critical. The windows
are input to SPSS via TRANS and stored in the
relation QBWINDOWS, and are used by the
scheduling process to restrict alignment level
activities.
'TV' = target visibility window. Target visibility
windows are the intersection of the sun
avoidance, anti-sun avoidance, and moon
avoidance windows. These windows are used byt
the scehduling process to restrict observation
set level activities. The avoidance constraint
angles come from the PDB relation WIDCR_PARMS.
The fields in widcr_parms are:
sun avoidance: sun_avoi_ang
anti-sun avoidance: asun_avdang
moon avoidance: mon_avoi_ang
The above avoidance angles can be overriden at
the observation set level. The overrides are in
the relation QBOVERRIDES and the fields are:
sun avoidance: sun_avoid
anti-sun avoidance: asun_avoid
moon avoidance: moon_avoid
'SN' = ST normal roll window. See the description for
'SO' windows below.
'SO' = ST off-normal roll window.
ST normal and off-normal roll windows
are restrictions imposed for scheduling an
observation set that are based on the
spacecraft orientation with respect to 'nominal
roll' and the 'solar array incidence angle'.
Nominal roll is defined as the V3 position
angle which places the sun in the V1-V3 plane.
Any other V3 position angle is considered
off-nominal.
The solar array incidence angle is the angle
between the normal vector of the surface of
the solar arrays and the Sun.
ST Roll windows are determined by intervals
where:
1) Solar Arrays are not shadowed by the ST body
This constraint is a power constraint. If
the solar arrays are shadowed by the
high-gain antennas, there is less power
available to charge the ST's batteries.
This condition only occurs at high
off-nominal roll angles.
These constraints are located in the
namelist file SPSSLIB:WONMRL.NML
2) Sun - Solar Array incidence angle is less
than the normal or off-normal limit.
This constraint is also a power constraint.
The closer the incidence angle is to zero,
the more power is available to charge the
ST's batteries. As the V1-Sun angle
approaches 90 degrees, the incidence angle
drops regardless of the roll angle, thus
the roll angle can be greater for higher
V1-sun angles.
These constraints are located in the
relation WIDCR_PARMS in the following fields:
normal incidence angle: norm_inc
maximum off-normal incidence angle: max_inc
The maximum off-normal incidence angle can be
overriden at the observation set level. The
override is in QBOVERRIDES:
maximum off-normal incidence angle: max_inc
'PC' = phase critical window. Phase critical windows
are periodic windows computed from parameters
input by the proposer and stored in the
following QBS_OBSET fields:
initial epoch: init_epoch
period: period_sph
phase: period_sph
These windows are used to represent such
astronomical events that are periodic in nature,
such as variable stars. They are used by the
scheduling process to restrict alignment level
activities.
'RN' = Guide star restricted normal roll window.
See the description for 'RO' windows below.
'RO' = Guide star restricted off-normal roll window.
The RN/RO windows are computed within intervals
defined by the SN/SO windows and within the
roll ranges imposed by the guide star pairs
contained in the acquisition data sets
(WGACQUIS) and alignment level orientations
(offset from nominal and range). The individual
RN/RO windows for each acquisition data set are
written to the relation WGRESWND to be
used by CCLIST/CREATE for scheduling. The
individual RN/RO windows are unioned together
and written to the relation QBWINDOWS as RN/RO
windows and intersected with other windows to
form the DN/DO windows.
'DN' = Derived normal window. See the description of
'DO' windows below.
'DO' = Derived off-normal window. Derived normal
windows and off Normal windows are the
intersection of the target visibility(TV),
ST normal/off-normal (SN/SO) and the union of
the guide star restricted normal/off-normal
(RN/RO) windows.
'MT' = Moving target window. MT windows are time
intervals computed by MOSS and stored in the
relation QBWINDOWS. The windows are read into
the C&C list by CCLIST/CREATE and used by SPSS
to restrict the alignment level activities.
The windows may be visibility related, such as
planetary occultation, or user preferred
viewing intervals."
RELATED_FIELDS "widcr_parms.sun_avoi_ang" "widcr_parms.asun_avdang" "widcr_parms.mon_avoi_ang" "widcr_parms.norm_inc" "widcr_parms.max_inc" "qboverrides.sun_avoid" "qboverrides.asun_avoid" "qboverrides.moon_avoid" "qboverrides.max_inc" "qbs_obset.init_epoch" "qbs_obset.period_sph" "qbs_obset.period_sph" "wgreswnd.*" "wgacquis.str_tim_usbl" "wgacquis.end_tim_usbl"
FORM
NAME "BWD"
LABEL "WINDOW TYPE"
END_FORM
DISCRETE "DN", "DO", "MT", "PC", "SN", "SO",
"TV", "US", "MN", "MO"
END_FIELD
FIELD critic_flg
TYPE C1
DESCRIPTION "This field is the window criticality flag where
'C' = the window is time critical, i.e. the
obset should be scheduled within the
window.
'P' = the window is preferred. The obset
should be scheduled within the window if
possible but may be outside it.
Preferred windows should be a subset of a
critical window - used operationally.
Set when window_type = 'US'."
FORM
NAME "BWD"
LABEL "TIME CRITICAL"
END_FORM
DISCRETE "C", "P"
END_FIELD
FIELD window_beg
TYPE SOGS_INT_TIME_TYPE
DESCRIPTION "This field is the window begin time."
FORM
NAME "BWD"
LABEL "START TIME"
END_FORM
END_FIELD
FIELD window_end
TYPE SOGS_INT_TIME_TYPE
DESCRIPTION "This field is the window end time."
FORM
NAME "BWD"
LABEL "STOP TIME"
END_FORM
END_FIELD
END_RECORD
!------------------------------------------------------------------------------
!
! RELATION DECLARATION
!
!------------------------------------------------------------------------------
RELATION qbwindows
TYPE QBWIND_TYPE
DESCRIPTION "Observation Set Windows Data Relation"
SUBSYSTEM_USING "SPSS", "TRANS"
FORM
NAME "BWD"
END_FORM
INDEX qbwindows_1
TYPE unique, clustered
FIELDS proposal_id, obset_id, version_num, window_type,
critic_flg, window_beg, window_end
END_INDEX
END_RELATION
!------------------------------------------------------------------------------
!
! INSTANCE DECLARATION
!
!------------------------------------------------------------------------------
INSTANCE qbwindows
GLOBAL
TYPE QBWIND_TYPE
END_INSTANCE
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