Required Reading
  ================
    The format of all VIR data are described in detail by the SIS document
    located in the /DOCUMENT directory. VIR team strongly recommends
    reading this documentation before using the data.
 
 
  Data Set Overview
  =================
       This data set contains the spectral radiance (W/(m**2*sr*micron))
       data from the Dawn VIR instrument visible channel for all Vesta
       encounter mission phases. The data cover the time period between
       2011-05-03 and 2012-07-18.
 
  VIR Vesta Observations
  ======================
    The following table contains a listing of VIR observations at Vesta.
 
    ------------------------------------------------------------------------
    Dawn Science Observations
    ------------------------------------------------------------------------
    Start    Mission Activity     Activity
    Date     Phase   Name         Description
    ========================================================================
    11-05-03 VSA    APPROACH     Vesta Science Approach Phase
    ------------------------------------------------------------------------
    11-05-10 VSA    OPNAV_002    Ride-along cubes to FC OpNav images
    11-06-08 VSA    OPNAV_006    Ride-along cubes to FC OpNav images
    11-06-14 VSA    OPNAV_007    Ride-along cubes to FC OpNav images
    11-06-30 VSA    RC1          Ride-along cubes to FC rotational
                                 characterization movie #1
    11-07-23 VSA    OPNAV_019    Ride-along cubes to FC OpNav images
    11-08-06 VSA    C0Mosaic     Ride-along cubes to FC mosaics images
                                 (equatorial and south)
 
    ------------------------------------------------------------------------
    11-08-11 VSS    SURVEY       Vesta Science Survey Phase (range ~3000 km)
    ------------------------------------------------------------------------
    11-08-11 VSS    CYCLE1       Survey Cycle (orbit) 1
    11-08-12 VSS    CYCLE1       C1 Pushbroom observation
    11-08-14 VSS    CYCLE2       Survey Cycle (orbit) 2
    11-08-14 VSS    CYCLE2       C2 24 VIR VIS+IR cubes at 12 stations
                                 (North)
    11-08-15 VSS    CYCLE2       C2 24 VIR VIS+IR cubes at 12 stations
                                 (South)
    11-08-17 VSS    CYCLE3       Survey Cycle (orbit) 3
    11-08-17 VSS    CYCLE3       C3 Pushbroom observation
    11-08-20 VSS    CYCLE4       Survey Cycle (orbit) 4
    11-08-20 VSS    CYCLE4       C4 20 VIR VIS+IR cubes at 10 stations
                                 (North)
    11-08-21 VSS    CYCLE4       C4 20 VIR VIS+IR cubes at 10 stations
                                 (South)
    11-08-23 VSS    CYCLE5       Survey Cycle (orbit) 5
    11-08-23 VSS    CYCLE5       C5 24 VIR VIS+IR cubes at 12 stations
                                 (North)
    11-08-24 VSS    CYCLE5       C5 24 VIR VIS+IR cubes at 12 stations
                                 (South)
    11-08-24 VSS    CYCLE6       Survey Cycle (orbit) 6
    11-08-25 VSS    CYCLE6       C6 24 VIR VIS+IR cubes at 12 stations
                                 (Equator)
    11-08-25 VSS    CYCLE6       C6 24 VIR VIS+IR cubes at 12 stations
                                 (South)
    11-08-28 VSS    CYCLE7       Survey Cycle (orbit) 7
    11-08-29 VSS    CYCLE7       C7 16 VIR VIS+IR cubes at 8 stations
                                 (North)
    11-08-29 VSS    CYCLE7       C7 Pushbroom observation
 
    ------------------------------------------------------------------------
    11-09-03 VTH    TRANSFER_    Vesta Transfer to HAMO Phase
                    TO_HAMO
    ------------------------------------------------------------------------
    11-09-17 VTH    OPNAV_003    Ride-along cubes to FC OpNav images
    11-09-20 VTH    BOUNUS_SCIENCE Bonus Science cubes
    11-09-25 VTH    FC1_CHECKOUT Ride-along cubes to FC1 checkout images
 
    ------------------------------------------------------------------------
    11-09-29 VSH    HAMO         Vesta Science HAMO Phase (avg rng ~950 km)
    ------------------------------------------------------------------------
    11-09-29 VSH    CYCLE1       10 orbits of ride-along pushbroom to FC
                                 nadir imaging
    11-10-06 VSH    CYCLE2       9 orbits of ride-along pushbroom to FC
                                 off-nadir imaging
    11-10-11 VSH    CYCLE3       10 orbits of ride-along cubes and pushbroom
                                 to FC off-nadir imaging
    11-10-16 VSH    CYCLE4       10 orbits of ride-along cubes and pushbroom
                                 to FC off-nadir imaging
    11-10-21 VSH    CYCLE5       10 orbits of ride-along cubes and pushbroom
                                 to FC off-nadir imaging
    11-10-26 VSH    CYCLE6       10 orbits of ride-along pushbroom to FC
                                 nadir imaging
 
    ------------------------------------------------------------------------
    11-11-02 VTL    TRANSFER_    Vesta Transfer to LAMO Phase
                    TO_LAMO
    ------------------------------------------------------------------------
    No VIR observations
 
    ------------------------------------------------------------------------
    11-12-12 VSL    LAMO         Vesta Science LAMO Phase (avg rng ~465 km)
    ------------------------------------------------------------------------
    11-12-13 VSL    CYCLE1       VIR powered off
    11-12-17 VSL    CYCLE2       VIR powered off
    11-12-24 VSL    CYCLE3       VIR powered off
    11-12-31 VSL    CYCLE4       VIR powered off
    12-01-07 VSL    CYCLE5       7 orbits (2 VIS+IR 5 VIS-only) VIR
                                 full-slit pushbroom cubes
    12-01-14 VSL    CYCLE6       S/C safing - no FC or VIR data acquired
    12-01-21 VSL    CYCLE7       7 orbits (2 VIS+IR 5 VIS-only) VIR
                                 full-slit pushbroom cubes
    12-01-28 VSL    CYCLE8       7 orbits (2 VIS+IR 5 VIS-only) VIR
                                 full-slit pushbroom cubes
    12-02-04 VSL    CYCLE9       4 orbits (2 full slit 2 quarter slit) VIR
                                 VIS-IR pushbroom cubes
    12-02-11 VSL    CYCLE10      4 orbits (2 full slit 2 quarter slit) VIR
                                 VIS-IR pushbroom cubes
    12-02-18 VSL    CYCLE11      4 orbits (2 full slit 2 quarter slit) VIR
                                 VIS-IR pushbroom cubes
    12-02-25 VSL    CYCLE12      4 orbits (2 full slit 2 quarter slit) VIR
                                 VIS-IR pushbroom cubes
    12-03-03 VSL    CYCLE13      4 orbits (2 full slit 2 quarter slit) VIR
                                 VIS-IR pushbroom cubes
    12-03-10 VSL    CYCLE14      4 orbits (2 full slit 2 quarter slit) VIR
                                 VIS-IR pushbroom cubes
    12-03-17 VSL    CYCLE15      4 orbits (2 full slit 2 quarter slit) VIR
                                 VIS-IR pushbroom cubes
    12-03-24 VSL    CYCLE16      4 orbits (2 full slit 2 quarter slit) VIR
                                 VIS-IR pushbroom cubes
    12-03-31 VSL    CYCLE17      4 orbits (2 full slit 2 quarter slit) VIR
                                 VIS-IR pushbroom cubes
    12-04-07 VSL    CYCLE18      4 orbits (2 full slit 2 quarter slit) VIR
                                 VIS-IR pushbroom cubes
    12-04-14 VSL    CYCLE19      4 orbits (2 full slit 2 quarter slit) VIR
                                 VIS-IR pushbroom cubes
    12-04-21 VSL    CYCLE20      4 orbits (2 full slit 2 quarter slit) VIR
                                 VIS-IR pushbroom cubes
    12-04-28 VSL    CYCLE21      4 orbits (2 full slit 2 quarter slit) VIR
                                 VIS-IR pushbroom cubes
 
    ------------------------------------------------------------------------
    12-05-01 VT2    TRANSFER_    Vesta Transfer to HAMO-2 Phase
                    TO_HAMO_2
    ------------------------------------------------------------------------
    No VIR observations
 
    ------------------------------------------------------------------------
    12-06-15 VH2    HAMO_2       Vesta Science HAMO Phase (avg rng ~950 km)
    ------------------------------------------------------------------------
    12-06-15 VH2    C0_OFFNADIR1 C0 10 orbits of VIR VIS+IR pushbroom cubes
                                 in the northern hemisphere and the south
                                 pole
    12-06-20 VH2    C0_OFFNADIR2 C0 7 orbits of VIR VIS+IR pushbroom cubes
                                 in the northern hemisphere
    12-06-24 VH2    CYCLE1       10 orbits of VIR VIS+IR pushbroom cubes
                                 in the southern hemisphere
    12-06-29 VH2    CYCLE2       10 orbits of VIR VIS+IR pushbroom cubes
                                 in the southern hemisphere
    12-07-04 VH2    CYCLE3       10 orbits of VIR VIS+IR pushbroom cubes
                                 in the equatorial region
    12-07-09 VH2    CYCLE4       10 orbits of VIR VIS+IR pushbroom and
                                 scan-mirrorcubes in the northern hemisphere
    12-07-14 VH2    CYCLE5       10 orbits of VIR VIS+IR pushbroom cubes
                                 in the equatorial region
    12-07-20 VH2    CYCLE6       10 orbits of VIR VIS+IR pushbroom cubes
                                 in the northern hemisphere
 
    ------------------------------------------------------------------------
    12-07-25 VTC    TRANSFER_    Vesta Transfer to Ceres Phase
                    TO_CERES
    ------------------------------------------------------------------------
    12-08-25 VTC    RC4          Ride-along cubes to FC rotational
                                 characterization movie #4
 
  Processing
  ==========
    The data in this data set are calibrated, CODMAC Level 3 data. The
    data processing includes spectral, geometric, flat-field, and
    radiometric calibration.  The details of how these calibrations were
    performed are described in the VIR_CALIBRATION document contained
    the DOCUMENT/CALIBRATION directory of this archive. This document
    describes how the calibration parameters were derived an gives a
    procedure for generating the calibrated data set from the raw EDR
    data set DAWN-A-VIR-2-EDR-VIS-VESTA-SPECTRA-V1.0. Files containing
    the calibration parameters and referenced in the calibration
    procedure are located in the CALIB directory of this archive
 
 
  Data
  ====
    The data are in PDS format. A detailed description of the data format
    is given in the VIR SIS document located in the DOCUMENT directory of
    this data set.
 
 
  Ancillary Data
  ==============
    No ancillary data included in this data set.
 
 
  Coordinate System
  =================
      The geometry items SC_SUN_POSITION_VECTOR,
      SC_TARGET_POSITION_VECTOR and SC_TARGET_VELOCITY_VECTOR
      provided in the label of the data product are relative to the
      Earth Mean Equator frame of J2000.
 
      SUB_SPACECRAFT_LATITUDE, SUB_SPACECRAFT_LONGITUDE are
      given in the PLANETOCENTRIC coordinate system. These parameters
      are corrected by planetary and stellar aberrations.
      Distances are given in km, angles in degrees.

Confidence Level Overview
  =========================
    Data confidence is nominal, meaning that all data have been
    validated by the VIR team and found as expected. Any exceptions
    are noted by the DATA_QUALITY field in the label files.
 
 
  Review
  ======
    These are the same data files that were utilized by the Dawn Science
    Team. Any errors or deficiencies reported by the Science Team were
    corrected by the VIR team. Note, however, that the geometry information
    provided in the PDS labels was updated to reflect the IAU (Claudia Double
    Prime) coordinate system and peer review issues have been resolved.
    A full PDS peer review was conducted of all products in this data set.
 
 
  Data Coverage and Quality
  =========================
    Data quality is good unless otherwise noted by the DATA_QUALITY
    keyword.
 
    Calibrated values in the spectral range [2.534E-06 m to 3.272E-06 m] are
    under verification, as a result these values have been set to null in
    the ITF.
 
 
  Limitations
  ===========
    No limitations on these data