Data Set Information
|
DATA_SET_NAME |
GIOTTO ION MASS SPECTROMETER HIGH ENERGY RANGE DATA V1.0
|
DATA_SET_ID |
GIO-C-IMS-3-RDR-HERS-HALLEY-V1.0
|
NSSDC_DATA_SET_ID |
XD-B3A
|
DATA_SET_TERSE_DESCRIPTION |
GIOTTO Ion Mass Spectrometer (High Energy Range) observations of
1P/Halley
|
DATA_SET_DESCRIPTION |
Data Set Overview
=================
A wide range of ion species and velocity
distributions are expected to be found as the Giotto
spacecraft traverses the coma of Halley's Comet. The
outer coma is characterized by the interaction
between solar wind and cometary plasmas, the inner
coma by the outflow of cometary neutrals and their
ionization products. The resultant demands on
instrument dynamic range preclude use of a single
sensor for measurements of ion composition. The
Giotto Ion Mass Spectrometer (IMS) therefore consists
of two sensors: one optimized for the outer and the
other for the inner coma, with each obtaining
complementary information in the region for which it
is not optimized. Both sensors feature mass imaging
characteristics, thereby permitting simultaneous
measurements of several ion species by means of
multi-detector arrays. The prime objective of the
High-Energy Range Spectrometer (HERS) is to measure
the ion abundances and three-dimensional velocity
distributions outside the cometary contact surface.
Sampling Parameter Name : TIME
Sampling Parameter Resolution : 64.0
Minimum Available Sampling Int : 16.0
Sampling Parameter Unit : SECOND
Data Set Parameter Name : COUNTS
Data Set Parameter Unit : SEC**-1
|
DATA_SET_RELEASE_DATE |
1992-04-30T00:00:00.000Z
|
START_TIME |
1986-03-13T06:30:06.000Z
|
STOP_TIME |
1986-03-14T12:00:58.000Z
|
MISSION_NAME |
GIOTTO
|
MISSION_START_DATE |
1985-07-02T12:00:00.000Z
|
MISSION_STOP_DATE |
1992-07-10T12:00:00.000Z
|
TARGET_NAME |
HALLEY
|
TARGET_TYPE |
COMET
|
INSTRUMENT_HOST_ID |
GIO
|
INSTRUMENT_NAME |
ION MASS SPECTROMETER
|
INSTRUMENT_ID |
IMS
|
INSTRUMENT_TYPE |
ION MASS SPECTROMETER
|
NODE_NAME |
Small Bodies
|
ARCHIVE_STATUS |
ARCHIVED
|
CONFIDENCE_LEVEL_NOTE |
Confidence Level Overview
=========================
N/A
|
CITATION_DESCRIPTION |
Altwegg, K., Balsiger, H., GIOTTO ION MASS SPECTROMETER HIGH
ENERGY RANGE DATA V1.0, GIO-C-IMS-3-RDR-HERS-HALLEY-V1.0, NASA
Planetary Data System, 1992.
|
ABSTRACT_TEXT |
A wide range of ion species and velocity distributions are
expected to be found as the Giotto spacecraft traverses the coma
of Halley's Comet. The outer coma is characterized by the
interaction between solar wind and cometary plasmas, the inner
coma by the outflow of cometary neutrals and their ionization
products. The resultant demands on instrument dynamic range
preclude use of a single sensor for measurements of ion
composition. The Giotto Ion Mass Spectrometer (IMS) therefore
consists of two sensors: one optimized for the outer and the
other for the inner coma, with each obtaining complementary
information in the region for which it is not optimized. Both
sensors feature mass imaging characteristics, thereby permitting
simultaneous measurements of several ion species by means of
multi-detector arrays. The prime objective of the High-Energy
Range Spectrometer (HERS) is to measure the ion abundances and
three-dimensional velocity distributions outside the cometary
contact surface.
|
PRODUCER_FULL_NAME |
INTERNATIONAL HALLEY WATCH
|
SEARCH/ACCESS DATA |
SBN Comet Website
|