Data Set Information
|
DATA_SET_NAME |
VG2 SAT CRS RESAMPLED SUMMARY D1 RATE
ELEC 192SEC V1.0
|
DATA_SET_ID |
VG2-S-CRS-4-SUMM-D1/D2-192SEC-V1.0
|
NSSDC_DATA_SET_ID |
|
DATA_SET_TERSE_DESCRIPTION |
Voyager 2 Cosmic Ray data from the Saturn encounter. The data set provides
the 192.0 second electron counting rate measurements for detectors D1 and D2.
|
DATA_SET_DESCRIPTION |
Data Set Overview
====================
This data set describes the counting rate data from detectors D1 and D2
in the Cosmic Ray System (CRS) electron telescope (TET) on Voyager 2 during
the Saturn encounter. The D1 detector nominally responds to electrons with
kinetic energies above approximately 1 MeV, and the D2 detector, above
approximately 2.5 MeV (see detector description for details).
Note that the instrument is saturated near the maximum of counting
rate of approximately 50,000 counts/sec. The following time intervals
in this data set contain saturated data:
D1: 1981-08-26 01:37 --> 1981-08-26 02:13
1981-08-26 05:15 --> 1981-08-26 05:51
D2: 1981-08-26 02:32 --> 1981-08-26 03:08
1981-08-26 04:24 --> 1981-08-26 04:47
When data are near saturation, the counting rates should be corrected
for deadtime according to the formula in the DATA_SET_OR_INST_PARM_DESC:
{corrected rate} = {uncorrected rate/(1+deadtime*{uncorrected rate}).
Parameters
===============
SAMPLING_PARAMETER_RESOLUTION = 192.0
MINIMUM_SAMPLING_PARAMETER = N/A
MAXIMUM_SAMPLING_PARAMETER = N/A
SAMPLING_PARAMETER_INTERVAL = 192.0
MINIMUM_AVAILABLE_SAMPLING_INT = 192.0
SAMPLING_PARAMETER_UNIT = SECOND
DATA_SET_PARAMETER_NAME = D1/D2 RATE
NOISE_LEVEL = 0.000
DATA_SET_PARAMETER_UNIT = COUNTS/SECOND
|
DATA_SET_RELEASE_DATE |
1995-03-01T00:00:00.000Z
|
START_TIME |
1981-08-24T04:01:36.000Z
|
STOP_TIME |
1981-08-30T09:58:24.000Z
|
MISSION_NAME |
VOYAGER
|
MISSION_START_DATE |
1972-07-01T12:00:00.000Z
|
MISSION_STOP_DATE |
N/A (ongoing)
|
TARGET_NAME |
SATURN
|
TARGET_TYPE |
PLANET
|
INSTRUMENT_HOST_ID |
VG2
|
INSTRUMENT_NAME |
COSMIC RAY SUBSYSTEM
|
INSTRUMENT_ID |
CRS
|
INSTRUMENT_TYPE |
CHARGED PARTICLE ANALYZER
|
NODE_NAME |
Planetary Plasma Interactions
|
ARCHIVE_STATUS |
ARCHIVED
|
CONFIDENCE_LEVEL_NOTE |
Confidence Level
=================
Each data point represents a six-second accumulation, so that the
statistical uncertainty is obtained according to Poisson statistics by
taking the square root of one sixth of the counting rate. However,
larger uncertainties are associated with the conversion from counting
rate to flux (see the DATA_SET_OR_INST_PARM_DESC)
Data Coverage
=============
Filename Records Start Stop
----------------------------------------------------------------------
Volume ID: VG_1601
D1D2.TAB 2705 1981-08-24T16:01:36.000Z 1981-08-30T21:58:24.000Z
Missing Data Flag
==================
Any data column whose value is -9.999e+10 is a missing data value.
|
CITATION_DESCRIPTION |
Selesnick R. S., VG2-S-CRS-4-SUMM-D1/D2-192SEC-V1.0,
VG2 SAT CRS RESAMPLED SUMMARY D1 RATE ELEC 192SEC V1.0,
NASA Planetary Data System, 1995.
|
ABSTRACT_TEXT |
This data set describes the counting
rate data from detectors D1 and D2 in the Cosmic Ray System (CRS) electron
telescope (TET) on Voyager 2 during the Saturn encounter. The D1 detector
nominally responds to electrons with kinetic energies above approximately
1 MeV, and the D2 detector, above approximately 2.5 MeV.
|
PRODUCER_FULL_NAME |
RICHARD S. SELESNICK
|
SEARCH/ACCESS DATA |
Planetary Plasma Interactions Website
|