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Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)


This description was generated automatically using input from the Planetary Data System.

Data Set Overview

This data set contains the spectral radiance (W/(m**2*sr*micron)) data from the Dawn VIR instrument infrared channel for all cruise mission phases. The data cover the time period between 2007-10-17 and 2011-03-15.

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.

VIR Cruise Observations

The following table contains a listing of VIR cruise calibrations. ------------------------------------------------------------------------Dawn Cruise Calibration Observations -----------------------------------------------------------------------Start Mission Activity Activity Date Phase Name Description ========================================================================= 2017-09-28 ICO ICO Initial Checkout ------------------------------------------------------------------------2007-10-17 ICO FUNC VIR Functional Test 2007-12-11 ICO STAR_CAL 33 IR & VIS Qubes centered on Arcturus ------------------------------------------------------------------------2008-01-19 EMC EMC Earth-Mars Cruise ------------------------------------------------------------------------2008-04-07 EMC CAL Full scan/slew qubes of Canopus & Mars ------------------------------------------------------------------------2009-03-23 MVC MVC Mars-Vesta Cruise ------------------------------------------------------------------------2009-12-03 MVC GEOCAL Scan/slew qubes of Canopus (IR) to compute mounting geometry - unsuccessful 2010-04-26 MVC GEOCAL Scan/slew qubes of Canopus (IR) to compute mounting geometry - unsuccessful 2010-05-10 MVC MMConfig 6Gb memory configuration test 2010-07-21 MVC GEOCAL Full scan/slew qubes of Canopus (IR) to compute mounting geometry - succeeded 2011-03-15 MVC FUNC Pre-Vesta VIR Functional Test -------------------------------------------------------------------------2012-09-10 VCC VCC Vesta-Ceres Cruise -------------------------------------------------------------------------There are no calibrated data from the Vesta-Ceres cruise phase. Activities during this phase did not open the cover. There are raw (EDR) versions of the check-out data. Functional checkouts were performed on 2012-352, 2013-320, and 2014-174. -------------------------------------------------------------------------The first two geometric calibrations failed to observe Canopus which was being used to determine the sensor alignments, because the cubes acquired were not large enough. The combination of ephemeris and pointing errors were larger than anticipated at the time when the observations were designed. The cube size was increased for the final observation which was successful.


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/VIR_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-X-VIR-2-EDR-IR-CRUISE-SPECTRA-V1.0.


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.


These data all use the same calibration files and procedures that were used in the processing of the Vesta data set archived on the PDS volume DWNVVIR_I1B. The calibration tables described in the calibration procedure can be found on the Vesta volume in the /CALIB directory off of the root. In particular, the labels for the data cubes on this volume refer to the instrument responsivity file 'DAWN_VIR_IR_RESP_V1.DAT'. This is one of the calibration tables provided on the Vesta data volume.

Housekeeping Data

Housekeeping data from the raw/EDR data set provided here are duplicated for the user's convenience.

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.

These data are available on-line from the Planetary Data System (PDS) at:

Alternate Names



  • Planetary Science: Small Bodies

Additional Information



Questions and comments about this data collection can be directed to: Dr. David R. Williams



NameRoleOriginal AffiliationE-mail
Dr. Maria Christina de SanctisData ProviderIstituto Nazionale di
Ms. Mariano De La RivaGeneral Contact
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