CDAW 9 S/C Brief Help Descriptions
This page is still under construction. Revised 9/14/95.
AMPTE/CCE (1984-088A)
Active Magnetosphere Particle Trace Experiment / Charge Composition Explorer
Equatorial Geocentric, Period=930 min. Perigee=550 km,Apogee=7.8 Re. Launched
8/16/84, spin period is 6 s. To study access of SW ions to the magnetosphere,
magnetospheric transfer and energ, & plasma interactions.
CDAW-9 data include plasma composition, waves and magnetic field.
AMPTE/IRM (1984-088B)
Active Magnetosphere Particle Trace Experiment / Ion Release Module
Geocentric, Inclination=28 degrees, Period=44 h. Perigee=550 km, Apogee=17.7 Re.
Launched 8/16/84, spin period is 4 s. To study access of solar wind ions to the
magnetosphere, magnetospheric transfer and energy, & plasma interactions.
CDAW-9 data to date are plasma waves only.
DE 1 (1981-070A)
Dynamics Explorer 1.
Polar Geocentric, Period=6.85 h. Perigee=568 km, Apogee=3.65 Re. Launched
8/03/81. With DE-2, measures interactive processes coupling hot plasms in
magnetosphere & cooler ones in the ionosphere & plasmasphere.
CDAW-9 data include imager, magnetic field & ion composition data.
GMS 3 (1984-080A)
Geostationary Meteorological Satellite 3
Equatorial Geostationary, Period=23.9 h. Perigee=5.6 Re, Apogee=5.6 Re. Launched
8/02/84.
To monitor high energy electron, proton & alpha particle fluxes from a
geostationary orbit. The satellite was spin-stabilized with a despun
earth-pointing antenna. The satellite was positioned near 140 degrees E and was
designed to operate for 5 years.
CDAW-9 has 2-minute electron and ion count data for events A-E. The data channel
was nominally designed for protons with energies 0.8 to 4 MeV. However, the
counting rate was mainly due to electrons with energies less than 500 keV.
GOES 5 (1981-049A)
Geostationary Operational Environmental Satellite 5
Equatorial Geostationary, Period=23.9 h. Perigee=5.60 Re, Apogee=5.61 Re.
Launched 5/22/81. To measure the geomagnetic field from a geosynchronous orbit.
During the CDAW-9 events, the spacecraft was located at 285 degrees E.
CDAW-9 data are magnetometer only.
GOES-6 (1983-041A)
Geostationary Operational Environmental Satellite 6
Equatorial Geostationary, Period=23.9 h. Perigee=5.6 Re, Apogee=5.6 Re. Launched
4/28/83. To measure the geomagnetic field from a geosynchronous orbit.
During the CDAW-9 events, the spacecraft was located at 252 degrees E.
CDAW-9 data are magnetometer only.
IMP-8 (1973-078A) (IMP-J)
Interplanetary Monitoring Platform 8
Geocentric, Period=12 d. Perigee=22.1 Re, Apogee=45.3 Re. Launched 10/26/73,
currently operational. To measure energetic particles, plasma & magnetic field
parameters at 30-40
Re for comparison with other s/c.
IMP-8 was in the solar wind for Events A, B, and E, and in the magnetosphere for
Event C. During Event D, IMP-8 crossed the bow shock from the magnetosheath
into the solar wind at 14 h UT.
CDAW-9 data include magnetic fields and plasma, and low energy particles, for
all events.
ISEE 1 (1977-102A) ("Mother")
International Sun-Earth Explorer 1
Geocentric, Period=57.4 h. Perigee=281 km, Apogee=21.7 Re. Launched 10/22/77,
Re-entered 9/26/87. To measure electric and magnetic fields, low energy particle
fluxes in the solar wind, bow shock, and outer magnetosphere with ISEE 2.
CDAW-9 data are B vector and various energy electrons and protons.
ISEE 2 (1977-102B) ("Daughter")
International Sun-Earth Explorer 2
Geocentric, Period=57.6 h. Perigee=280 km, Apogee=21.7 Re. Launched 10/22/77,
Re-entered 9/26/87. To measure electric and magnetic flds, and low energy
particle fluxes in the solar wind, ow shock, and outer magnetosphere with ISEE
1.
CDAW-9 data are B vector and low-energy electrons and protons.
MODELS
CDAW-9 includes terrestrial magnetic field models. T87 (Tsyganenko 1987) and
STRetch models are available to be run within "Data Manipulation" in CDAW. For
comparison with data, Model predictions at the orbits of selected s/c are in
CDFs xxMD for s/c xx.
SCATHA (1979-007A) (STP P78-2)
Spacecraft Charging at High Altitudes
Space Test Program P78-2
Equatorial Geocentric, Period=23.6 h. Perigee=4.3 Re, Apogee=6.8 Re. Launched
6/30/79. To measure magnetic fields and particles data over a wide energy range,
from 4.3 to 6.8 Re.
CDAW-9 data include magnetic field, plasma and energetic particles.
Viking (1986-019B) (Sweden)
Polar Geocentric,Period=4.5 hr. Perigee=800 km, Apogee=2.2 Re. Launched 2/22/86.
To investigate interactions of hot/cold collisionless plasma on auroral field
lines.
CDAW-9 data include auroral imager and field/plasma/particle/wave data.
82-019A (1982-019A)
Equatorial Geostationary, Period=23.9 h. Perigee=5.61 Re, Apogee=5.61 Re.
Launched 3/06/82. To measure high and low energy electron, proton and alpha
particle fluxes from a geostationary orbit.
During the CDAW-9 events, the spacecraft was located at 322 degrees E.
84-037A (1984-037A)
Equatorial Geostationary, Period=23.9 h. Perigee=5.64 Re, Apogee=5.64 Re.
Launched 4/14/84. To measure high and low energy electron, proton and alpha
particle fluxes from a geostationary orbit.
During the CDAW-9 events, the spacecraft was located at 70 degrees E.
84-129A (1984-129A) (USA 7)
Equatorial Geostationary, Period=23.7 h. Perigee=5.56 Re, Apogee=5.57 Re.
Launched 12/22/84. To measure high and low energy electron, proton and alpha
particle fluxes from a geostationary orbit.
During the CDAW-9 events, the spacecraft was located at 205 degrees E.
GROUND BASED OBSERVATIONS
There are many types of ground based data. Most of CDAW-9's ground based data
are related to geomagnetic field values, variations, and indexes, with some
riometer, photometer, and ground radar data.
SPDF Home Page
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Operations Office (SSDOO)
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Author and Curator: H. Kent Hills (hills@nssdca.gsfc.nasa.gov)
NASA Official: Robert E. McGuire (mcguire@nssdca.gsfc.nasa.gov)
Head, Space Physics Data Facility (Code 632), NASA/GSFC
Last Revised: 21 Nov 1996 [HKH]