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Data   Request Data

UCLA Space Physics Data Center

The REQUEST account was created to facilitate the process of distributing datasets housed at the UCLA Space Science Center to the research community. The Space Physics Group maintains the request account, allowing a network user the opportunity to review catalogues, request data and leave messages for the request coordinator using a menu-driven interface. The REQUEST account may be used by all members of the space physics community to request data in a simplified and rapid manner.

Access to the REQUEST Account is available.

Access to the IMP-8 interactive data display is also available.

REQUEST Account Offered Services:

1. Magnetic data from some tens of chains of ground stations are currently available for 1977 through 1987. They are available at one minute resolution in either HDZ or XYZ coordinates. Data from one chain (IGS) is available from 1977-1979 at 2.5 s resolution.

2. Magnetic field data are available for the following missions:

IMP-8: 15.36 second magnetic field data. 5 minute merged plasma/magnetic data.

ISEE-1: Magnetic Field data from October 22 1977 through Sept 26 1987 at all resolutions. 60 second summary files are available for 1980 through 1983;

ISEE-2: Magnetic Field data from October 22 1977 through Sept 26 1987 at all resolutions. 60 second summary files are available for 1977 through 1979, and for 1984 through re-entry;

ISEE-3: Magnetic Field data from 1978 (launch) through November 1985. Intervals in 1986 are available on an 'as requested' basis;

PVO: Data from both the magnetometer (OMAG) and electric field detector (OEFD) experiments are currently available for orbits 1-5055, i.e. 1978 339 Dec 5 - 1992 281 Oct 7. In addition, 'Cruise Data' are available for the craft in 1978 as it traveled to Venus.

AMPTE-UKS: magnetic field data are now available for all orbits in which the magnetometer was enabled. In general, this means orbits 3 through 82;

Available Distribution Media -

As a general rule, all requests will be fulfilled with ASCII files. Should you desire a different data format, please include a description of it in your request. Depending on volume and user preference, data may be provided electronically via INTERNET and NSI/DECNET, or via 9-track tape and 8mm tape. Write-once CD-ROM's are currently being investigated as a distribution media for large data requests.

Accessing the request account -

For information concerning access to the UCLA request account please send e-mail to "ctrussell@igpp.ucla.edu" or "request@igpp.ucla.edu".

GROUND MAGNETOMETER DATA AT UCLA

Magnetic data from chains of ground stations are currently available at UCLA for 1977 through 1987. They are available at one minute resolution in either HDZ or XYZ coordinates.

Data from the following chains of stations are available (with number of stations given to the right),

     ALASKA CHAIN          17        FORT CHURCHILL CHAIN   25
     AURORAL ZONE CHAIN    17        CANADIAN CHAIN         12
     AFGL (HI LAT) CHAIN   5         MID-LATITUDE CHAIN     19
     AFGL (LO LAT) CHAIN   2         USGS CHAIN             8
     BRAUNSCHWEIG CHAIN    10        IGS CHAIN              19
IGS data (Institute of Geophysical Science) for 1977-1979 at 2.5 s resolution are also available.

Use the request account to browse the data catalogs or to send a request to request operator.

IMP-8 FIVE MINUTE AVERAGE MAGNETIC FIELD AND PLASMA DATA

These data sets consist of 5-min averages of interplanetary magnetic field (IMF) data and solar wind plasma parameters from IMP-8. Independent sets of parameters from the two plasma instruments (LANL and MIT) are included. Cartesian components of the IMF vectors in GSE and GSM coordinates are given. Plasma parameters include flow speed, density, temperatures (scalar, plus maximum and minimum with respect to spin phase), alpha to proton ratio, and flow direction angles. The data at UCLA are averages that were computed from higher-resolution data provided by NSSDC. Magnetic field data are included for all orbital phases (solar wind, magnetosheath, and magnetotail), while the plasma data are given for solar wind only (LANL) or solar wind and magnetosheath (MIT).

Use the request account to browse the data catalogs or to send a request to request operator.

ISEE-1 AND ISEE-2 MAGNETIC FIELD DATA AT UCLA

The ISEE-1 and ISEE-2 data sets at UCLA consist of magnetic field data from from launch in Oct. 22, 1977 through re-entry in Sept. 26, 1987. In addition, 60 second resolution summary files, which contain merged magnetic field, orbit/attitude, and model field data, are now available for at least one of the two craft though re-entry. Data may be requested at any resolution, using any averaging scheme, but the following are recommended:

64 second averages of Bx, By, Bz, and BT;
4 second resolution (12 second average) of Bx, By, Bz, and BT;
High resolution data (.25 second or .0625 second resolution);
60 second averages merged with position and model field data.

ISEE data may be requested in any one of the following coordinate systems:

S/C (Spacecraft coordinates);
GSE (Geocentric Solar Ecliptic);
GSM (Geocentric Solar Magnetic);
DIP (Dipole Coordinates).
In addition, the following data may be included with any ISEE data request:

Position data in Earth Radii in either GSE or GSM coordinates
Standard Deviations of the averaging process
Internal and External Model Field data
Use the request account to browse the data catalogs or to send a request to request operator.

ISEE-3/ICE MAGNETIC FIELD DATA AT UCLA

The Vector Helium Magnetometer on ISEE-3 is a slightly modified version of the magnetometers on Pioneer-10 and Pioneer-11. The sensor measures the three steady-state components of the magnetic field in the spacecraft coordinate system and variations with frequencies up to 3 Hz.

The ISEE-3 data sets at UCLA consist of magnetic field data and solar wind parameters. Processing of ISEE-3 datapool magnetic field data is currently completed through the end of 1985. In addition, several periods in 1986 have been processed. Since the ISEE-3 database is extracted solely from the data-pool tapes, data is only available at 64 second resolution. The selection of coordinate systems is also limited; only GSE and GSM coordinates are available. Position data is available in GSE or GSM coordinates.

Certain Solar Wind parameters are available for ISEE-3. Currently, these include: Particle Density (n/cc), Velocity (km/sec), and Flow Angle (deg).

Use the request account to browse the data catalogs or to send a request to request operator.

Pioneer Venus Orbiter (PVO) magnetometer (OMAG) and Electric Field Detector (OEFD) data at UCLA

Pioneer Venus Orbiter data from both the magnetometer (OMAG) and electric field detector (OEFD) experiments are available at UCLA.

The magnetometer data are available as three orthogonal components plus the total field value (in nanoteslas), in either Spacecraft (S/C) or Venus Solar Orbital (VSO) coordinates. Electric Field data are available as spectral densities (in volts squared per meter per hertz), for four frequency channels centered at 30khz, 5.4khz, 730hz, and 100hz.

Data from either experiment may be requested at any resolution, but the following are recommended:

1 minute averages with a 2 minute averaging window.
1 average per spin period, with a 2 spin period averaging window. The normal PVO spin period is about 12 seconds.
High Resolution data. Varies from 1/24 second to 24 seconds, depending upon the telemetry rate. 1/4 second is the most common resolution.

1 minute averages of magnetic field data will include variances. 1 minute averages of electric field data will include 2 minute maxima, minima, and averages. One spin period resolution electric field data will also include maxima, minima, and averages.

Magnetic and electric field data are currently available from orbit 1-5055 1978 Dec 5 (339) - 1992 Oct 7 (281). In addition, 'Cruise Data' are available for the craft in 1978 as it traveled to Venus.

Use the request account to browse the data catalogs or to send a request to request operator.


For more information contact Dr. Chris Russell, e-mail: ctrussell@igpp.ucla.edu.


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Last updated: April 24, 2000