Data Set Information
|
DATA_SET_NAME |
ROSETTA-ORBITER 67P/CAL ALICE 4 ESC1 V2.0
|
DATA_SET_ID |
RO-C/CAL-ALICE-4-ESC1-V2.0
|
NSSDC_DATA_SET_ID |
|
DATA_SET_TERSE_DESCRIPTION |
Reformatted, calibrated instrument data
from the Rosetta Orbiter ALICE instrument during the ESC1
mission phase
|
DATA_SET_DESCRIPTION |
Required Reading
================
The format of all Alice data are described in detail by the EAICD
document located in the /DOCUMENT directory. The Alice team
strongly recommends reading this documentation before using the
data.
Data Set Overview
=================
This data set contains reformatted, calibrated data acquired by
the Rosetta Orbiter ALICE UV Spectrometer during the Comet Escort 1
mission phase, which took place between 2014-11-20 and
2015-03-10.
Processing
==========
The data in this data set are reformatted, calibrated CODMAC Level 4
data. As such, corrections for detector dead time, dark counts,
flatfield, and effective area have generally been applied. The primary
FITS header contains a list of which corrections have been applied to
that file. See the CALIBRATION_COOKBOOK.PDF in the DOCUMENT directory
for more information.
Data
====
The data are in FITS format and text format. Each FITS file has a
detached PDS label so that they can be read either by FITS or PDS
tools. A detailed description of the data format is given in the
ALICE EAICD 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 and Equinox frame of J2000.
SUB_SPACECRAFT_LATITUDE, SUB_SPACECRAFT_LONGITUDE are given in the
Cheops reference frame. These parameters are computed at
time t=START_TIME. Distances are given in km, angles in degrees.
The 67P/C-G_CK comet frame is defined by the kernel file,
ROS_CHURYUMOV_V01.TF.
Software
========
All FITS readers should be able to successfully read the data.
Updates for Volume Version 2
============================
The main correction applied to the data for volume version 2 is a fix
to the PIXEL_LIST_TABLE extension of the FITS file for data acquired in
pixel list mode. This issue was discovered after the volume version 1
data set had been accepted and publicly released. Also, browse images
have been supplied in the BROWSE directory.
|
DATA_SET_RELEASE_DATE |
2016-12-16T00:00:00.000Z
|
START_TIME |
2014-11-20T01:00:01.022Z
|
STOP_TIME |
2015-03-10T10:52:02.385Z
|
MISSION_NAME |
INTERNATIONAL ROSETTA MISSION
|
MISSION_START_DATE |
1995-03-01T12:00:00.000Z
|
MISSION_STOP_DATE |
N/A (ongoing)
|
TARGET_NAME |
CALIBRATION
67P/CHURYUMOV-GERASIMENKO 1 (1969 R1)
|
TARGET_TYPE |
CALIBRATION
COMET
|
INSTRUMENT_HOST_ID |
RO
|
INSTRUMENT_NAME |
ALICE
|
INSTRUMENT_ID |
ALICE
|
INSTRUMENT_TYPE |
ULTRAVIOLET SPECTROMETER
|
NODE_NAME |
Small Bodies
|
ARCHIVE_STATUS |
SUPERSEDED
|
CONFIDENCE_LEVEL_NOTE |
Confidence Level Overview
=========================
Data confidence is nominal, meaning that all data have been
validated by the Alice team and found as expected. Any exceptions
are noted by the DATA_QUALITY field in the label files.
Review
======
The data have undergone a scientific review and all scientific RID's
have been addressed.
Data Coverage and Quality
=========================
Data quality is good unless otherwise noted by the DATA_QUALITY
keyword.
Limitations
===========
|
CITATION_DESCRIPTION |
Steffl, A. J., Kaufmann, D. E.,
Parker, J. Wm., and S. A. Stern,
ROSETTA-ORBITER 67P/CAL ALICE 4 ESC1 V2.0,
RO-C/CAL-ALICE-4-ESC1-V2.0,
ESA Planetary Science Archive and NASA Planetary Data System, 2017.
|
ABSTRACT_TEXT |
This data set contains CODMAC Level 4 data
acquired by the Rosetta Orbiter ALICE UV Spectrometer during the
comet 67P/Churyumov-Gerasimenko Comet Escort 1 mission phase, which
took place between 2014-11-20 and 2015-03-10. The current V2.0 data
set supersedes the previous V1.0 data set. Pixel list data files
have had corrections applied to their FITS formatting, and browse
images have been supplied.
|
PRODUCER_FULL_NAME |
ANDREW J. STEFFL
|
SEARCH/ACCESS DATA |
SBN Comet Website
|
|