Data Set Information
|
| DATA_SET_NAME |
DAWN VIR RAW (EDR) VESTA INFRARED SPECTRA V2.0
|
| DATA_SET_ID |
DAWN-A-VIR-2-EDR-IR-VESTA-SPECTRA-V2.0
|
| NSSDC_DATA_SET_ID |
|
| DATA_SET_TERSE_DESCRIPTION |
Raw data from the VIR instrument
infrared channel on the DAWN spacecraft taken during the Vesta
Encounter mission phases. The data in this version of the data set
include minor updates to the data files and labels.
|
| DATA_SET_DESCRIPTION |
Data Set Overview
=================
This data set contains raw digital numbers (DN) returned by the Dawn
VIR spectrometer infrared (IR) channel during the Vesta Encounter phases
of the DAWN mission, covering May 3, 2011 to July 18, 2012.
Changes in version 2 of this data set include:
1) Saturated data have been replaced with the
CORE_HIGH_INSTR_SATURATION value.
2) The contaminated region in HAMO has been filled using the CORE_NULL
value.
3) Corrections to some of the housekeeping (HK) data values.
Note that Version 2.0 of the data set consists of version 3 data products
(PRODUCT_VERSION_ID = 03; file names = *_3.*). The version 2 data
products were not included in the PDS archive.
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 Version History
========================
V1.0, 2014-Feb-27 - Initial release
V2.0, 2017-Jul-20 - Updates to the data and label files
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 raw, CODMAC Level 2 data. As such, no
processes have been applied to the data other than decompression and
reformatting as cubes.
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 for planetary and stellar aberrations.
Distances are given in km, angles in degrees.
|
| DATA_SET_RELEASE_DATE |
2017-07-20T00:00:00.000Z
|
| START_TIME |
2011-05-03T12:00:00.000Z
|
| STOP_TIME |
2012-08-26T02:29:16.000Z
|
| MISSION_NAME |
DAWN MISSION TO VESTA AND CERES
|
| MISSION_START_DATE |
2007-09-27T12:00:00.000Z
|
| MISSION_STOP_DATE |
2017-06-30T12:00:00.000Z
|
| TARGET_NAME |
4 VESTA
|
| TARGET_TYPE |
ASTEROID
|
| INSTRUMENT_HOST_ID |
DAWN
|
| INSTRUMENT_NAME |
VISIBLE AND INFRARED SPECTROMETER
|
| INSTRUMENT_ID |
VIR
|
| INSTRUMENT_TYPE |
IMAGING SPECTROMETER
|
| NODE_NAME |
Small Bodies
|
| ARCHIVE_STATUS |
|
| CONFIDENCE_LEVEL_NOTE |
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.
Dropouts that may be observed in some images are due to instrument
saturation. The spectral range in which these dropouts occur varies
depending upon exposure duration, target topography, and incidence
angle.
Contamination has been noted in the IR data due to the buildup of some
unidentified substance on the instrument sensor. The contamination is
in the 3-micron region and is related to cold-trapped volatiles which
mimic a water vapor absorption. This contamination is mitigated by the
frequent powering off of the cryocooler, allowing the sensor to warm
and the substance to evaporate. Contamination was most prevalent during
Vesta HAMO and to a lesser extent Vesta HAMO 2 as the cryocooler was
turned on throughout all of HAMO (32 days), and up to 2 weeks during
HAMO 2.
Limitations
===========
No limitations on these data
|
| CITATION_DESCRIPTION |
De Sanctis, M.C., M.T. Capria, E.
Ammannito, M. Giardino, S. Fonte, R. Noschese, A. Coradini,
DAWN VIR RAW (EDR) VESTA INFRARED SPECTRA V2.0,
DAWN-A-VIR-2-EDR-IR-VESTA-SPECTRA-V2.0, NASA Planetary Data System,
2016.
|
| ABSTRACT_TEXT |
This data set contains the raw
infrared channel digital numbers (DN) contained in the telemetry
packages taken by the Dawn VIR spectrometer for all Vesta encounter
mission phaes. The data in this version of the data set include
minor updates to the data files and labels. The data cover the time
period between 2011-05-03 and 2012-07-18.
|
| PRODUCER_FULL_NAME |
MARIA CRISTINA DE SANCTIS
|
| SEARCH/ACCESS DATA |
SBN PSI WEBSITE
|
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