The LANL 1994-084 MPA data set contains various parameters in a variety of coordinates systems including GEI, spacecraft, polar geographic, and polar magnetic coordinates at about 87 s resolution. These parameters include universal time, denisty, velocity, and temperature for both low and high energy ions and electrons as well as position information and instrument status flags.
Version:2.2.9
The LANL 1994-084 MPA data set contains various parameters in a variety of coordinates systems including GEI, spacecraft, polar geographic, and polar magnetic coordinates at about 87 s resolution. These parameters include universal time, denisty, velocity, and temperature for both low and high energy ions and electrons as well as position information and instrument status flags.
| Role | Person | |
|---|---|---|
| 1. | PrincipalInvestigator | spase://SMWG/Person/Michelle.F.Thomsen |
| 2. | GeneralContact | spase://SMWG/Person/Michael.G.Henderson |
| 3. | MetadataContact | spase://SMWG/Person/James.M.Weygand |
Journal of Geophysical Research Article on the LANL MPA instrument.
In CDF via HTTP from CDAWeb
This is the time of the proton data collection (electrons 21.5 seconds later). Universal Time in data cell: day, month, year hour, min, seconds. Ex: '01-Jan-1981 00:00:00.000'.
This is the time of the proton collection (electrons 21.5 seconds later). Time in the format: year, day of year, and second of the same day.
Date and Time Vector.
Partial density of low energy ions (1-130 eV/e).
Velocity vector low-enery Ions (1-130 eV/e) in spacecraft Coordinates in units of km/s.
Temperature of low energy ions (1-130 eV/e).
Ratio of temperature (Tperp/Tmid) of low energy ions (1-130 eV/e).
Partial density of high energy ions (.13-45 keV/e).
Velocity vector high-enery protons (.13-45 keV/e) in spacecraft Coordinates in units of km/s.
Temperature of high energy ions (.13-45 keV/e).
Proton symmetry axis: polar angle relative to Earth direction, azimuthal angle from the north.
Ratio of temperature (Tperp/Tmid) of low energy ions (.13-45 keV/e).
Partial density of electrons (.03-45 keV/q).
Temperature of electrons (.03-45 keV/q).
Electron symmetry axis: polar angle relative to Earth direction, azimuthal angle from the north.
Ratio of temperature (Tperp/Tmid) of electrons (.03-45 keV/q).
Spacecraft potential in units of volts.
Background Count Rate.
Spacecraft position, polar geographic coordinates (radius,lat,long).
Polar Geographic Coordinates.
Spacecraft position, cartesian coordinates (radius,lat,long). Geocentric Celestial Inertial, is earth centered, with the X-axis pointing from the Earth towards the first point of Aries (the position of the Sun at vernal equinox). This direction is the intersection of the Earth's equatorial plane and the ecliptic plane--thus the X-axis lies in both planes. The Z-axis is parallel to the rotation axis of the Earth, and the Y-axis completes a right-handed orthogonal coordinate system. The X-axis is the direction of the mean vernal equinox of J2000. This is a virtual variable generated by read_myCDF w/ useof the data in the sc_pos_geo variable and a conversion routinespecified in the function attribute, namely conv_pos.
Geocentric Celestial Inertial coordinates.
Spacecraft position, polar magnetic coordinates (radius,lat,long).
Polar Magnetic Coordinates.
Data quality flag. Data quality flag, 0 = ok, 1 = Results unreliable.
Data gap flag. Data gap flag, 0 = No Gap, 10 = No data available.
Time offset for electron measurements. Electron sample time is 21.5 seconds after that of ions.