!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!
! SDDL Name:    SI_APERTURE.SDDL
!
! Purpose:      This SDDL file defines the si_aperture relation.
!
! Modification History:
!
!   Date       OPR      Who                       Reason
! --------   -------    ---   -------------------------------------------------
! 01/28/99    31487     Baum    Original implementation
!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!
!

LANGUAGE        SQL

RECORD  SI_APERTURE_TYPE

!------------------------------------------------------------------------------
!
!   RECORD INFORMATION
!
!------------------------------------------------------------------------------


    DESCRIPTION       "Data values to be used in computing the aperture
                       position and orientation for OMS jitter files or OPUS
                       target acquistion software, where the use-date refers 
                       to the start time of the first SMS which used these 
                       values."


!------------------------------------------------------------------------------
!
!   FIELD INFORMATION
!
!------------------------------------------------------------------------------


    FIELD  si_aper_id
        TYPE            C*10
        DESCRIPTION     "si aperture identifier: si_name + si_aperture
                        the relation is indexed by the si identifier"
    END_FIELD


    FIELD  use_date
        TYPE            C*17
        DESCRIPTION     "usage date (yyyy.ddd:hh:mm:ss) at SMS start, before 
                         which the data for this aperture must not be used"
    END_FIELD


    FIELD  parity
        TYPE            I*2
        DESCRIPTION     "+1/-1... parity value used in the transformation
                        from the sics to the v2v3 system"
    END_FIELD


    FIELD  v2_of_ref
        TYPE            R*8
        DESCRIPTION     "v2 coordinate of aperture reference point
                        in arc seconds"
    END_FIELD


    FIELD  v3_of_ref
        TYPE            R*8
        DESCRIPTION     "v3 coordinate of aperture reference point
                        in arc seconds"
    END_FIELD


    FIELD  pixel_incr
        TYPE            R*8
        DESCRIPTION     "pixel increment in arc seconds"
    END_FIELD


    FIELD  line_incr
        TYPE            R*8
        DESCRIPTION     "line increment in arc seconds"
    END_FIELD


    FIELD  ang_inc_pix
        TYPE            R*8
        DESCRIPTION     "angle, in degrees, from v3 to the line of
                        increasing pixels, positive counterclockwise
                        viewed along positive v1 axis."
    END_FIELD


    FIELD  ang_inc_line
        TYPE            R*8
        DESCRIPTION     "angle, in degrees, from v3 to the line of
                        increasing lines, positive counterclockwise
                        viewed along positive v1 axis."
    END_FIELD

END_RECORD

!------------------------------------------------------------------------------
!
!   RELATION DECLARATION
!
!------------------------------------------------------------------------------


RELATION  si_aperture

    TYPE             SI_APERTURE_TYPE

    DESCRIPTION      "Data for each SI aperture"

    SUBSYSTEM_USING  "OMS"
 
    INDEX  si_aperture_1      
        TYPE          unique clustered
        FIELDS        si_aper_id, use_date
    END_INDEX

END_RELATION