Data Set Information
DATA_SET_NAME VG1 JUP PLS DERIVED ION OUTBND MAGSHTH M-MODE 96SEC V1.0
DATA_SET_ID VG1-J-PLS-5-SUMM-ION-M-MODE-96S-V1.0
NSSDC_DATA_SET_ID
DATA_SET_TERSE_DESCRIPTION
DATA_SET_DESCRIPTION Data Set Overview ================= Instrument P.I. : John D. Richardson Data Supplier : John D. Richardson Data sampling rate : 96 seconds Data Set Start Time : 1979-03-13T00:01:43.491Z Data Set Stop Time : 1979-03-24T23:20:06.519Z This data set contains plasma parameters from Voyager 1 outbound from Jupiter from the magnetotail through the solar wind. Fit and moment parameters are given; the fit parameters assume a single, isotropic convected proton Maxwellian distribution. Although magnetotail data is provided, these data are unreliable; the density can be used as an upper limit to the actual density. Solar wind data are also provided and are reliable. These M mode data are the best data to use in most regions of the magnetosheath. Magnetotail data in this data set are included mainly to put the sheath data in context and show magnetopause. Parameters ========== Data Set Parameter 'ION DENSITY' -------------------------------- Data Set Parameter Name : ION DENSITY Data Set Parameter Unit : CM**-3 Sampling Parameter Name : TIME Sampling Parameter Unit : SECOND Minimum Sampling Parameter : UNK Maximum Sampling Parameter : UNK Sampling Parameter Interval : UNK Minimum Available Sampling Int : UNK Noise Level : UNK A derived parameter equaling the number of ions per unit volume over a specified range of ion energy, energy/charge, or energy/nucleon. Discrimination with regard to mass and or charge state is necessary to obtain this quantity, however, mass and charge state are often assumed due to instrument limitations. Many different forms of ion density are derived. Some are distinguished by their composition (N+, proton, ion, etc.) or their method of derivation (Maxwellian fit, method of moments). In some cases, more than one type of density will be provided in a single data set. In general, if more than one ion species is analyzed, either by moment or fit, a total density will be provided which is the sum of the ion densities. If a plasma component does not have a Maxwellian distribution the actual distribution can be represented as the sum of several Maxwellians, in which case the density of each Maxwellian is given. Data Set Parameter 'ION THERMAL SPEED' -------------------------------------- Data Set Parameter Name : ION THERMAL SPEED Data Set Parameter Unit : KM/S Sampling Parameter Name : TIME Sampling Parameter Unit : SECOND Minimum Sampling Parameter : UNK Maximum Sampling Parameter : UNK Sampling Parameter Interval : UNK Minimum Available Sampling Int : UNK Noise Level : UNK A measure of the velocity associated with the temperature of the ions. It is formally defined as the Ion Thermal Speed squared equals two times K (Boltzmann's constant) times T (temperature of ion) divided by M (ion mass). Each component of a plasma has a thermal speed associated with it. Data Set Parameter 'ION VELOCITY' --------------------------------- Data Set Parameter Name : ION VELOCITY Data Set Parameter Unit : KM/S Sampling Parameter Name : TIME Sampling Parameter Unit : SECOND Minimum Sampling Parameter : UNK Maximum Sampling Parameter : UNK Sampling Parameter Interval : UNK Minimum Available Sampling Int : UNK Noise Level : UNK A derived parameter giving the average speed and direction of motion of a plasma or plasma component. The velocity can be obtained by taking the first moment of the distribution function or by simulating the observations with some known distribution function, usually a Maxwellian, to the distribution. Velocities are given in heliographic (RTN) coordinates: R is radially away from sun, T is in plane of sun's equator and positive in the direction of solar rotation, N completes right-handed system. Source Instrument Parameters ============================ Instrument Host ID : VG1 Data Set Parameter Name : ION DENSITY Instrument Parameter Name : ION RATE Important Instrument Parameters : 1 Instrument Host ID : VG1 Data Set Parameter Name : ION DENSITY Instrument Parameter Name : ION CURRENT Important Instrument Parameters : 1 Instrument Host ID : VG1 Data Set Parameter Name : ION VELOCITY Instrument Parameter Name : ION CURRENT Important Instrument Parameters : 1 Instrument Host ID : VG1 Data Set Parameter Name : ION THERMAL SPEED Instrument Parameter Name : ION RATE Important Instrument Parameters : 1 Instrument Host ID : VG1 Data Set Parameter Name : ION THERMAL SPEED Instrument Parameter Name : ION CURRENT Important Instrument Parameters : 1 Instrument Host ID : VG1 Data Set Parameter Name : ION DENSITY Instrument Parameter Name : PARTICLE MULTIPLE PARAMETERS Important Instrument Parameters : 1 Data Coverage ============= Filename Records Start Stop ------------------------------------------------------------------- T79072 10232 1979-03-13T00:01:43.491Z 1979-03-24T23:20:06.519Z
DATA_SET_RELEASE_DATE 1998-05-01T00:00:00.000Z
START_TIME 1979-03-13T12:01:43.491Z
STOP_TIME 1979-03-24T11:20:06.519Z
MISSION_NAME VOYAGER
MISSION_START_DATE 1972-07-01T12:00:00.000Z
MISSION_STOP_DATE N/A (ongoing)
TARGET_NAME JUPITER
TARGET_TYPE PLANET
INSTRUMENT_HOST_ID VG1
INSTRUMENT_NAME PLASMA SCIENCE EXPERIMENT
INSTRUMENT_ID PLS
INSTRUMENT_TYPE PLASMA INSTRUMENT
NODE_NAME planetary plasma interactions
ARCHIVE_STATUS ARCHIVED
CONFIDENCE_LEVEL_NOTE Confidence Level Overview ========================= The data is not reliable inside the magnetopause. In the magnetosheath and solar wind this data is generally reliable. Missing Data Flag ================= Any data column whose value is -9.9999 or -9999.9 (depending upon column format) is a missing data value.
CITATION_DESCRIPTION Richardson, J.D., VG1-J-PLS-5-SUMM-ION-M-MODE-96S-V1.0, VG1 JUP PLS DERIVED ION OUTBND MAGSHTH M-MODE 96SEC V1.0, NASA lanetary Data System, 1998.
ABSTRACT_TEXT Voyager 1 Plasma Experiment (PLS) averaged ion m mode 96 second data at Jupiter.
PRODUCER_FULL_NAME JOHN D. RICHARDSON
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