 
 
Viking Orbiter Image SEDR Data
===========================================================================
 
     Created by Boris Semenov, NAIF/JPL, March-July, 1996; comments were
     augmented/reformatted in April 2000.
 
 
File Contents
--------------------------------------------------------
 
     This SPICE Data Base Kernel (DBK) file contains a subset of the
     information from the original Supplementary Engineering Data Record
     (SEDR) data set generated by the Viking Project. Only non-derived,
     non-geometric information from the SEDR was included into this file.
     The geometric information contained in SEDR was left out because it
     was superseded by later, more accurate processing, results of which
     are provided in the other VO SPICE kernels.
 
 
Applicability
--------------------------------------------------------
 
     This file was created for two purposes:
 
         --   to capture the most original meta information for the images
              and to make this information more conveniently available
              through SPICE, and
 
         --   to provide possibility for easier correlation of this data
              with other VO information captured in SPICE DBK format.
 
 
Data Table Structure
--------------------------------------------------------
 
     This file contains a single table called ``VIKING_SEDR_DATA'' which
     has the following columns:
 
           SPACECRAFT_ID        CH*3   VO1 or VO2;
 
           INSTRUMENT_ID        CH*4   VISA or VISB;
 
           IMAGE_ID             CH*6   image ID;
 
           IMAGE_NUMBER         INT    FSC count at which image was taken;
 
           IMAGE_TIME           TIME   UTC time of the image;
 
           EXPOSURE_DURATION    DP     exposure duration, milliseconds;
 
           FILTER_ID            INT    filter ID;
 
           FLOOD_MODE_ID        CH*3   flood mode ID;
 
           GAIN_MODE_ID         CH*4   gain mode ID;
 
           OFFSET_MODE_ID       CH*3   offset mode ID;
 
           PLATFORM_CLOCK       DP     instrument platform orientation
                                       clock angle, degrees;
 
           PLATFORM_CONE        DP     instrument platform orientation cone
                                       angle, degrees;
 
           PLATFORM_TWIST       DP     instrument platform orientation
                                       twist angle, degrees;
 
           PLATFORM_IN_MOTION   CH*3   YES or NO;
 
     The plaform rotation angles define orientation of the instrument
     platform with the respect to the Sun-star reference frame -- Sun at
     +Z, star in the XZ plane -- as follows:
 
        M = | TWIST |  * | CONE | * | CLOCK |
                     Z           Y           Z
 
     where M is such that
 
        V         = M * V
         Platform        Sun-Star
 
 
Pedigree
--------------------------------------------------------
 
     The data stored in this file were extracted from the SEDR data set
     provided to NAIF by USGS, Flagstaff in 1996.
 
 
Usage Note
--------------------------------------------------------
 
     The data in this file may accessed via SPICE Toolkit EK subroutines or
     examined using SPICE utility program INSPEKT.
 
 
Related Kernels
--------------------------------------------------------
 
     An LSK file is required by INSPEKT in order to access the data in this
     file.
 
 
Contacts
--------------------------------------------------------
 
     If you have any question regarding this data contact NAIF at JPL:
 
        Charles H. Acton, Jr
        (818)-354-3869
        chuck.acton@jpl.nasa.gov
 
        Boris V. Semenov
        (818)-354-8136
        boris.semenov@jpl.nasa.gov
 
 
