PDS: Data Set Information

Data Set Information
DATA_SET_NAME	VG2 NEP MAG RESAMP RDR HELIOGRAPHIC COORDINATES 1.92SEC V1.0
DATA_SET_ID	VG2-N-MAG-4-RDR-HGCOORDS-1.92SEC-V1.0
NSSDC_DATA_SET_ID
DATA_SET_TERSE_DESCRIPTION	Voyager 2 1.92 second resampled data in Heliographic coordinates from the Low Field Magnetometer (LFM) from Voyager 2 during the Neptune encounter from 1989-08-24 to 1989-08-27.
DATA_SET_DESCRIPTION	Data Set Overview ================= This data set includes data from the Low Field Magnetometer (LFM) during the inbound Neptune encounter beginning in the solar wind and continuing until the first magnetopause crossing. The magnetometer are given in Heliographic coordinates and the data have been averaged from the 60ms instrument sample rate to a 1.92 second resampled rate. The dataset consists of the following columns: 1) ctime (decimal seconds since 1966-01-01T00:00:00.000), 2) pdstime (ISO standard time format), 3-5) spacecraft clock (m65536,m60,fds-line), 6) magnetometer id (1 = LFM, 2 = HFM), 7), Br (radial component), 8) Bt (tangential component), 9) Bn (normal component), 10) Bmag (magnitude of the average components), 11) avg_Bmag (average of the magnitude of the raw components), 12) Lambda (longitude = tan^-1(Bt/Br)), 13) Delta (latitude = sin^-1(Bn/avg_Bmag) ), 14-16) rms vector (Pythagorean root mean square deviation of the component averages), 17) npts (number of points in average), 18) flag a character string which indicates software or s/c hardware intervention which reduces confidence in the data (NULL flags represent 'good' data). Parameters ========== Derived Parameters ------------------ Sampling Parameter Name : time Sampling Parameter Resolution : 0.06 seconds Minimum Sampling Parameter : 0.06 seconds Maximum Sampling Parameter : 0.06 seconds Sampling Parameter Interval : 1.92 seconds Minimum Available Sampling Interval : 1.92 seconds Data Set Parameter Name : magnetic field vector Noise Level : 0.006 nT Data Set Parameter Unit : nanotesla Magentic field vector: A derived parameter which combines the 3 orthogonal magnetic field component measurements. Measured Parameters ------------------- Magentic field component: A measured parameter equaling the magnetic field strength (e.g. in nanoteslas) along a particular axis direction. Usually the three orthogonal axis components are measured by three different sensors. Ancillary Data ============== An ancillary data file containing the derived spacecraft magnetic field is provided with this data at a 48 second sample rate. These data provide zero level offsets used in the data processing. S/C field data is provided in spacecraft coordinates. Coordinate System ================= Mean Inertial Heliographic 1950 (HG) Coordinates ------------------------------------------------ COORDINATE_SYSTEM_CENTER_NAME : SUN COORDINATE_SYSTEM_REFERENCE_EPOCH : UNK /* 09-23-1950 */ The Heliographic coordinate system is defined in the reference epoch of 1950. The unit vectors which define the coordinate system are as follows: X points away from the Sun toward the ascending node, in the solar equatorial plane, Z points along the Sun's spin axis, positive above the equatorial plane, and Y completes the right handed set. Position is given in terms of the following: RANGE (R) - The range or R component of the spherical Heliographic coordinate system is the distance from the Sun's position at the reference epoch to the spacecraft measured in AU. LATITUDE (LAT) - The latitude component of the spherical Heliographic coordinate system is the angle between the solar equatorial plane of the reference epoch measured in the plane that contains the solar spin axis of that epoch. LONGITUDE (LONG) - The longitude component of the spherical Heliographic coordinate system is zero in the direction of the ascending node at the reference epoch (X direction) and increases for a body orbiting the Sun as the Earth does. X - The X component of the Heliographic coordinate system points away from the Sun, towards the ascending node, and lies in the solar equatorial plane. Y - The Y vector of the Heliographic coordinate system is formed by the righthanded cross product of the X and Z unit vectors. It lies in the solar equatorial plane and it points away from the Sun, but does not extend in the direction of any particular body. Z - The Z component of the Heliographic coordinate system is parallel to the Sun's spin axis, taken as positive above the equatorial plane of the Sun.
DATA_SET_RELEASE_DATE	1992-06-01T00:00:00.000Z
START_TIME	1989-08-22T12:00:47.000Z
STOP_TIME	1989-08-29T12:00:44.000Z
MISSION_NAME	VOYAGER
MISSION_START_DATE	1972-07-01T12:00:00.000Z
MISSION_STOP_DATE	N/A (ongoing)
TARGET_NAME	NEPTUNE
TARGET_TYPE	PLANET
INSTRUMENT_HOST_ID	VG2
INSTRUMENT_NAME	TRIAXIAL FLUXGATE MAGNETOMETER
INSTRUMENT_ID	MAG
INSTRUMENT_TYPE	MAGNETOMETER
NODE_NAME	Planetary Plasma Interactions
ARCHIVE_STATUS	ARCHIVED
CONFIDENCE_LEVEL_NOTE	Confidence Level Overview ========================= This dataset contains some data gaps and spikes. The dataset does contain a flag value which has been provided by the PI (Norman Ness) that indicates whether or not a particular record has been contaminated by software error or by spacecraft interference ( a NULL flag string indicates good data. Strings which contain characters may be contaminated in one or more ways. Some records that are obviously contaminated have not been flagged. Data Quality and Coverage ========================= Table 1 contains hourly summaries of the percentage of the data available, data quality, and contamination codes. Tables 2 and 3 contain descriptions of the data quality and data contamination ID's respectively. ------------------------------------------------------------------- Table 1. Hourly Data Coverage and Quality Summaries ------------------------------------------------------------------- Start Time Mode Percent Qual Contam NumGood ------------------------------------------------------------------- 1989-08-22T01:00:01 ENCOUNTER 98.720 -1 -1 31467 1989-08-22T02:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-22T03:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-22T04:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-22T05:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-22T06:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-22T07:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-22T08:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-22T09:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-22T10:00:01 ENCOUNTER 96.000 -1 -1 30600 1989-08-22T11:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-22T12:00:01 ENCOUNTER 98.667 -1 -1 31450 1989-08-22T13:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-22T14:00:01 ENCOUNTER 94.667 -1 -1 30175 1989-08-22T15:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-22T16:00:01 ENCOUNTER 96.000 -1 -1 30600 1989-08-22T17:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-22T18:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-22T19:00:01 ENCOUNTER 97.333 -1 -1 31025 1989-08-22T20:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-22T21:00:01 ENCOUNTER 98.667 -1 -1 31450 1989-08-22T22:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-22T23:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-23T00:00:47 ENCOUNTER 99.947 -1 -1 31858 1989-08-23T01:00:01 ENCOUNTER 98.720 -1 -1 31467 1989-08-23T02:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-23T03:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-23T04:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-23T05:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-23T06:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-23T07:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-23T08:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-23T09:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-23T10:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-23T11:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-23T12:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-23T13:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-23T14:00:01 ENCOUNTER 96.000 -1 -1 30600 1989-08-23T15:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-23T16:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-23T17:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-23T18:00:01 ENCOUNTER 97.333 -1 -1 31025 1989-08-23T19:00:01 ENCOUNTER 93.333 -1 -1 29750 1989-08-23T20:00:01 ENCOUNTER 93.333 -1 -1 29750 1989-08-23T21:00:01 ENCOUNTER 93.333 -1 -1 29750 1989-08-23T22:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-23T23:00:47 ENCOUNTER 99.947 -1 -1 31858 1989-08-24T00:00:01 ENCOUNTER 98.720 -1 -1 31467 1989-08-24T01:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-24T02:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-24T03:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-24T04:00:47 ENCOUNTER 99.947 -1 -1 31858 1989-08-24T05:00:01 ENCOUNTER 98.720 -1 -1 31467 1989-08-24T06:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-24T07:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-24T08:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-24T09:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-24T10:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-24T11:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-24T12:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-24T13:00:01 ENCOUNTER 98.667 -1 -1 31450 1989-08-24T14:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-24T15:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-24T16:00:01 ENCOUNTER 94.667 -1 -1 30175 1989-08-24T17:00:01 ENCOUNTER 98.667 -1 -1 31450 1989-08-24T18:00:01 ENCOUNTER 98.667 -1 -1 31450 1989-08-24T19:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-24T20:00:47 ENCOUNTER 99.947 -1 -1 31858 1989-08-24T21:00:01 ENCOUNTER 96.053 -1 -1 30617 1989-08-24T22:00:01 ENCOUNTER 98.667 -1 -1 31450 1989-08-24T23:00:01 ENCOUNTER 97.333 -1 -1 31025 1989-08-25T00:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-25T01:00:01 ENCOUNTER 97.333 -1 -1 31025 1989-08-26T00:00:47 ENCOUNTER 99.947 -1 -1 31858 1989-08-26T01:00:01 ENCOUNTER 96.835 -1 -1 31042 1989-08-26T02:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-26T03:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-26T04:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-26T05:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-26T06:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-26T07:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-26T08:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-26T09:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-26T10:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-26T11:00:01 ENCOUNTER 99.423 -1 -1 31875 1989-08-26T12:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-26T13:00:01 ENCOUNTER 98.996 -1 -1 31875 1989-08-26T14:00:01 ENCOUNTER 95.282 -1 -1 31875 1989-08-26T15:00:01 ENCOUNTER 85.791 -1 -1 31450 1989-08-26T16:00:01 ENCOUNTER 96.386 -1 -1 31875 1989-08-26T17:00:01 ENCOUNTER 80.976 -1 -1 31875 1989-08-26T18:00:01 ENCOUNTER 78.391 -1 -1 31875 1989-08-26T19:00:01 ENCOUNTER 85.346 -1 -1 31875 1989-08-26T20:00:01 ENCOUNTER 84.838 -1 -1 31875 1989-08-26T21:00:01 ENCOUNTER 79.275 -1 -1 30175 1989-08-26T22:00:01 ENCOUNTER 89.544 -1 -1 31875 1989-08-26T23:00:01 ENCOUNTER 88.555 -1 -1 31875 1989-08-27T00:00:01 ENCOUNTER 88.298 -1 -1 31875 1989-08-27T01:00:01 ENCOUNTER 89.813 -1 -1 31875 1989-08-27T02:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-27T03:00:01 ENCOUNTER 98.491 -1 -1 31450 1989-08-27T04:00:01 ENCOUNTER 99.423 -1 -1 31875 1989-08-27T05:00:01 ENCOUNTER 100.000 -1 -1 31875 1989-08-27T06:00:00 ENCOUNTER 100.000 -1 -1 31875 1989-08-27T07:00:00 ENCOUNTER 100.000 -1 -1 31875 1989-08-27T08:00:00 ENCOUNTER 100.000 -1 -1 31875 1989-08-27T09:00:00 ENCOUNTER 100.000 -1 -1 31875 1989-08-27T10:00:47 ENCOUNTER 97.280 -1 -1 31008 1989-08-27T11:00:00 ENCOUNTER 97.362 -1 -1 31042 1989-08-27T12:00:00 ENCOUNTER 100.000 -1 -1 31875 1989-08-27T13:00:00 ENCOUNTER 99.423 -1 -1 31875 1989-08-27T14:00:00 ENCOUNTER 98.616 -1 -1 31450 1989-08-27T15:00:00 ENCOUNTER 100.000 -1 -1 31875 1989-08-27T16:00:00 ENCOUNTER 100.000 -1 -1 31875 1989-08-27T17:00:00 ENCOUNTER 99.448 -1 -1 31875 1989-08-27T18:00:00 ENCOUNTER 100.000 -1 -1 31875 1989-08-27T19:00:00 ENCOUNTER 98.140 -1 -1 31450 1989-08-27T20:00:00 ENCOUNTER 100.000 -1 -1 31875 1989-08-27T21:00:00 ENCOUNTER 97.208 -1 -1 31025 1989-08-27T22:00:00 ENCOUNTER 100.000 -1 -1 31875 1989-08-27T23:00:00 ENCOUNTER 100.000 -1 -1 31875 1989-08-28T00:00:00 ENCOUNTER 100.000 -1 -1 31875 1989-08-28T01:00:00 ENCOUNTER 100.000 -1 -1 31875 1989-08-28T02:00:00 ENCOUNTER 100.000 -1 -1 31875 1989-08-28T03:00:00 ENCOUNTER 99.824 -1 -1 31875 1989-08-28T04:00:00 ENCOUNTER 100.000 -1 -1 31875 1989-08-28T05:00:00 ENCOUNTER 100.000 -1 -1 31875 1989-08-28T06:00:00 ENCOUNTER 91.548 -1 -1 29325 1989-08-28T07:00:00 ENCOUNTER 100.000 -1 -1 31875 1989-08-28T08:00:00 ENCOUNTER 99.222 -1 -1 31875 1989-08-28T09:00:00 ENCOUNTER 99.849 -1 -1 31875 1989-08-28T10:00:00 ENCOUNTER 94.723 -1 -1 31025 1989-08-28T11:00:00 ENCOUNTER 85.867 -1 -1 31875 1989-08-28T12:00:00 ENCOUNTER 84.916 -1 -1 31450 1989-08-28T13:00:00 ENCOUNTER 82.406 -1 -1 31875 1989-08-28T14:00:00 ENCOUNTER 81.625 -1 -1 31450 1989-08-28T15:00:00 ENCOUNTER 77.462 -1 -1 31875 1989-08-28T16:00:00 ENCOUNTER 84.289 -1 -1 31875 1989-08-28T17:00:00 ENCOUNTER 92.251 -1 -1 31875 1989-08-28T18:00:00 ENCOUNTER 99.969 -1 -1 31875 1989-08-28T19:00:00 ENCOUNTER 100.000 -1 -1 31875 1989-08-28T20:00:00 ENCOUNTER 100.000 -1 -1 31875 1989-08-28T21:00:00 ENCOUNTER 92.329 -1 -1 29750 1989-08-28T22:00:00 ENCOUNTER 99.021 -1 -1 31875 1989-08-28T23:00:00 ENCOUNTER 99.900 -1 -1 31875 1989-08-29T00:00:00 ENCOUNTER 96.135 -1 -1 31875 1989-08-29T00:00:44 ENCOUNTER 1.280 -1 -1 408 -------------------------------------------------------------------- Table 2. Data Quality ID Descriptions -------------------------------------------------------------------- ID Description -------------------------------------------------------------------- -1 no attempt has been made to specify a data quality for this time range -------------------------------------------------------------------- Table 3. Data Contamination ID Descriptions -------------------------------------------------------------------- ID Description -------------------------------------------------------------------- -1 no evaluation of possible contamination has been made
CITATION_DESCRIPTION	Connerney, J.E.P., VG2-N-MAG-4-RDR-HGCOORDS-1.92SEC-V1.0, VG2 NEP MAG RESAMP RDR HELIOGRAPHIC COORDINATES 1.92SEC V1.0, NASA Planetary Data System, 1992.
ABSTRACT_TEXT	This data set includes data from the Low Field Magnetometer (LFM) during the inbound Neptune encounter beginning in the solar wind and continuing until the first magnetopause crossing. The magnetometer are given in Heliographic coordinates and the data have been averaged from the 60ms instrument sample rate to a 1.92 second resampled rate.
PRODUCER_FULL_NAME	DR. JOHN E. P. CONNERNEY
SEARCH/ACCESS DATA	Planetary Plasma Interactions Website

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