Geotail

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Geotail
Geotail satellite.jpg
Geotail satellite (artist's concept)
Mission type Earth observation
Operator ISAS
NASA
COSPAR ID 1992-044A
SATCAT № 22049
Website www.stp.isas.jaxa.jp/geotail/
Spacecraft properties
Launch mass 980 kilograms (2,160 lb)
Power 273.0 watts
Start of mission
Launch date 24 July 1992, 14:26:00 (1992-07-24UTC14:26Z) UTC
Rocket Delta II 6925
Launch site Cape Canaveral LC-17A
Orbital parameters
Reference system Geocentric
Regime Highly elliptical
Semi-major axis 126,670.73 kilometres (78,709.54 mi)[1]
Eccentricity 0.5758771[1]
Perigee 47,352 kilometres (29,423 mi)[1]
Apogee 193,246 kilometres (120,077 mi)[1]
Inclination 18.46 degrees[1]
Period 7478.05 minutes[1]
Epoch 8 April 2014, 12:23:00 UTC[1]

Geotail is a satellite observing the Earth's magnetosphere. It was developed by Japan's ISAS in association with the United States' NASA, and was launched by a Delta II rocket on July 24, 1992.

From the Geotail website (listed below): "The Geotail satellite was launched on July 24, 1992, by a Delta II launch vehicle from Cape Canaveral Air Force Station, Florida, United States. The primary purpose of this mission is to study the structure and dynamics of the tail region of the magnetosphere with a comprehensive set of scientific instruments. For this purpose, the orbit has been designed to cover the magnetotail over a wide range of distances: 8 Re to 210 Re from the earth. This orbit also allows us to study the boundary region of the magnetosphere as it skims the magnetopause at perigees. In the first two years the double lunar swing-by technique was used to keep apogees in the distant magnetotail. The apogee was lowered down to 50 Re in mid November 1994 and then to 30 Re in February 1995 in order to study substorm processes in the near-Earth tail region. The present orbit is 9 Re x 30 Re with inclination of -7° to the ecliptic plane."

Geotail instruments studied electric fields, magnetic fields, plasmas, energetic particles, and plasma waves.[2]

Geotail is an active mission as of 2012.[3] Geotail, Wind, Polar, SOHO, and Cluster were all part of the International Solar-Terrestrial Physics (ISTP) project.[3]

See also[edit]

References[edit]

  1. ^ a b c d e f g "GEOTAIL Satellite details 1992-044A NORAD 22049". N2YO. 8 April 2014. Retrieved 5 April 2014. 
  2. ^ Instruments of the Geotail Spacecraft
  3. ^ a b NASA - Geotail

External links[edit]