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Detailed information about ORSTED satellite

Designator id: 1999-008B

Description of ORSTED Satellite:

This spacecraft was named after the Danish physicist Hans Christian Oersted (1771-1851), who discovered electromagnetism in 1820. The spacecraft primary science objectives were to perform highly accurate and sensitive measurements of the geomagnetic field and to perform global monitoring of the high energy charged particle environment.

The instrumentation consisted of two magnetometers (proton precession and fluxgate), a star imager for attitude determination, a solid-state charged particle detector package, and a GPS receiver. The Science Instrument Team is responsible for the design of the instruments, while the Science Team is responsible for the science mission planning and international science participation. The science data obtained during the planned one-year mission will be used to derive an updated model of the geomagnetic field and its secular variation and to study the magnetospheric field-aligned currents and their relationship to ionospheric and solar wind conditions.

The principal research topics are in two areas: (1) studies of the generation of the magnetic field in the fluid core and the magnetic and electrical properties of the solid earth; and (2) studies of earth's magnetic field as the controlling parameter of the magnetosphere and of all the physical processes that take place in the earth's plasma environment, including phenomena like aurora and magnetic storms.

To utilize the Oersted science data return, the plan is to establish an internationally recognized research environment in the field of solar-terrestrial physics, a Solar-Terrestrial Physics Laboratory, comprising magnetospheric, ionospheric, and atmospheric physics in combination with research in the magnetic field of the earth. Correlative studies will be carried out using observations from existing monitoring stations in Greenland and other polar regions.

The spacecraft was launched as an auxiliary payload into a near-sun synchronous elliptical polar orbit, with inclination about 96 degrees, perigee/apogee of about 630/850 km, and nodal drift rate 0.76 degree/day. It is gravity-gradient stabilized, with its extendable 8-m boom aligned to and pointing away from the center of the earth. Active attitude control is achieved using three-axis magnetic torqueing coils. The data system features on-board monitoring and pre-processing. Data is stored in a 16-Mbyte on-board memory and downlinked in packetized format when a ground station is in view. The Oersted homepage is located at:

http://www.dmi.dk/fsweb/Projects/oersted/


Technical data:

Launch Date: 1999-02-23
Launch Vehicle: Delta II 7920
Launch Site: Vandenberg AFB, United States
Mass: 60.8 kg
Nominal Power: 54.0 W
Funding Agencies:

Danish Meteorological Institute (Denmark)
Danish Ministry of Commerce (Denmark)
Danish Ministry of Transportation (Denmark)
Centre National d'Etudes Spatiales (France)
National Aeronautics and Space Administration (United States)
European Space Agency (International)
Danish Ministry of Science (Denmark)
Danish Space Research Institute (Denmark)

Disciplines:

Space Physics

Source: Nasa

Two Line Element Set (TLE):
1 25635U 99008B   12337.97567287  .00000188  00000-0  53362-4 0  6788
2 25635 096.4817 245.3679 0143207 127.6605 233.7684 14.46527694726521

Last TLE update on :2012-12-03

Find more details about ORSTED Satellite