Data Set Information
DATA_SET_NAME GALILEO JUPITER PLASMA RESAMPLED BROWSE SPECTRA V1.0
DATA_SET_ID GO-J-PLS-4-SUMM-BROWSE-V1.0
NSSDC_DATA_SET_ID
DATA_SET_TERSE_DESCRIPTION
DATA_SET_DESCRIPTION Overview: ========= This data set contains spin averaged count rates from selected ion and electron channels from the Plasma Science experiment (PLS) onboard the Galileo spacecraft during the Jupiter orbital operations phase. Effects due to spacecraft charging and to background from high energy penetrating radiation have not been removed. Parameters: =========== The ion count rate data files cover the E/Q range of 4.2 - 52521 Volts in 14 energy bands for the 2P, 4P, and 6P detectors. Electron count rate data file also covers 14 energy bands from the E4 detector in the E/Q range 3.9 - 48790 Volts. The energy bands are: ----------------------------------------------- Band E/Q, Volts P2,P4,P6 E4 ----------------------------------------------- 1 4.2- 7.2 3.9 - 6.7 2 8.6- 14.5 8.0 - 13.5 3 17.3- 29.0 16.1 - 26.9 4 34.3- 57.1 31.9 - 53.1 5 67.4- 112.0 62.6 - 104.0 6 132.5- 219.9 123.1 - 204.3 7 244.3- 454.4 227.0 - 422.1 8 549.0- 960.7 510.0 - 892.5 9 1153. - 1958. 1071. - 1819. 10 2324. - 3788. 2159. - 3519. 11 4575. - 7777. 4250. - 7225. 12 8821. - 15189 8194. - 14110 13 17971 - 29829 16694 - 27710 14 34770 - 52521 32300 - 48790 ------------------------------- Sensor Polar angle coverage, theta ------------------------------- 4E 81 deg-102 deg perpendicular to the s/c spin vector 2P 35 deg-59 deg generally farther from the sun 4P 78 deg-99 deg perpendicular to the s/c spin vector 6P 118 deg-141 deg generally closer to the sun Processing: =========== The browse data files are obtained by averaging data for one energy spectrum from the reduced data record (RDR) files. The PLS instrument obtains an energy spectrum in either one spacecraft rotation (LPW) or two spacecraft rotations (RTS). The time tag is set to the spacecraft clock (SCLK) value at the start of the average. Energy averaging is done by adding together all available measurements within each energy band and dividing by the number of samples. Ancillary Data: =============== Several ancillary files are provided with these data: calibration tables, calibration document, and a spacecraft events file. Calibration: PLSCALIB.TXT Describes the calibration algorithm and pitfalls. PLS_DETS.TAB maps detector numbers to detector names/functions E_STEP_1.TAB E-steps for electron detectors 14,16,18, and 20. E_STEP_2.TAB E-steps for ion dets 3,5,9,11 and mass spec dets 6,7 E_STEP_3.TAB E-steps for electron detectors 15,17, and 19. E_STEP_4.TAB E-steps for ion dets 4,8,10 and mass spec dets 1,2,12,13 M_STEP_1.TAB M-steps for the mass spectrometer channels SECTOR.TXT AACS sector values for quadrant and octant sectoring modes CALIB_1.TAB Calibration factors to convert count rates from electron detectors 14,16,18, and 20 to differential flux. CALIB_2.TAB Calibration factors to convert count rates from ion detectors 3,5,9,11 and mass spec detectors 6,7 to differential flux. CALIB_3.TAB Calibration factors to convert count rates from electron detectors 15,17, and 19 to differential flux. CALIB_4.TAB Calibration factors to convert count rates from ion detectors 4,8,10 and mass spec detectors 1,2,12,13 to differential flux. Spacecraft Events: XXX_EVNT.TXT A time ordered file extracted from the As-Run Spacecraft Events Files (ARSEF) that provides the timing of events that are significant to the plasma experiment. These events include which type of data (RTS or LPW) is being generated by PLS, and whether the data is being acquired. This file also includes the times of thruster firings. All PLS high voltages are turned off during thruster firings. The 'XXX' in the file name is the orbit name (i.e. G01 for orbit Ganymede 1). Coordinate System: ================== Data are provided in PLS instrument coordinates. Please refer to the instrument description paper [FRANKETAL1992] for a description of the instrument mounting, detector fields of view, and spin phase sectoring. Software: ========= There are no software provided with this archive. Media/Format: ============= These data are archived on either CDROM or DVDROM media. Data from each detector is stored in a separate data file. The data files are simple ASCII tables that are described by a detached PDS label (Table Object). Each of the four tables have the following structure: Col# Name Format Description ----------------------------------------------------------------------- 1 Time A24 Spacecraft event time (UTC) 2 SCLK A11 Spacecraft clock counter 3 Band_1 1PE8.2 Spin averaged count rate for energy band 1 4 Band_2 1PE8.2 Spin averaged count rate for energy band 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Band_14 1PE8.2 Spin averaged count rate for energy band 14
DATA_SET_RELEASE_DATE 2003-11-21T00:00:00.000Z
START_TIME 1995-12-07T03:30:00.000Z
STOP_TIME 2003-09-21T06:45:00.000Z
MISSION_NAME GALILEO
MISSION_START_DATE 1977-10-01T12:00:00.000Z
MISSION_STOP_DATE 2003-09-21T12:00:00.000Z
TARGET_NAME IO PLASMA TORUS
GANYMEDE
IO
CALLISTO
AMALTHEA
EUROPA
JUPITER
TARGET_TYPE PLASMA CLOUD
SATELLITE
PLANET
INSTRUMENT_HOST_ID GO
INSTRUMENT_NAME PLASMA SCIENCE EXPERIMENT
INSTRUMENT_ID PLS
INSTRUMENT_TYPE PLASMA INSTRUMENT
NODE_NAME planetary plasma interactions
ARCHIVE_STATUS ARCHIVED
CONFIDENCE_LEVEL_NOTE Review: ========= These data are provided so that users can get a quick look into the data acquired by the PLS instrument. They are not intended for detailed analysis. Lots of PLS data can be quickly scanned using these data in order to identify regions of potential interest. Once such a region is identified, the user is strongly encouraged to use the RDR data set (GO-J-PLS-2-RDR-RAWCOUNTS-V1.0) in their analysis. Data Coverage/Quality: ====================== All data that were received on the ground from the PLS instrument after December 1995 are included in this data set. This data set contains gaps in coverage. Many of these gaps were planned (insufficient telemetry coverage to provide continuous data) and others were not (telemetry dropouts, station outages, etc.).
CITATION_DESCRIPTION Frank, L.A., Paterson, W.R., Ackerson, K.L., GALILEO JUPITER PLASMA RESAMPLED BROWSE SPECTRA V1.0, GO-J-PLS-4-SUMM-BROWSE-V1.0,NASA Planetary Data System, 2003
ABSTRACT_TEXT This data set contains spin averaged count rates from selected ion and electron channels from the Plasma Science experiment (PLS) onboard the Galileo spacecraft during the Jupiter orbital operations phase. Effects due to spacecraft charging and to background from high energy penetrating radiation have not been removed.
PRODUCER_FULL_NAME DR. KENT ACKERSON
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