Satellite Orbits and Uses NIS

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ORBITAL ELEMENTS Keplerian Elements: Inclination

Orbital Plane

Equatorial Plane

Inclination ( i )

Slide 42

Perturbations

Definition

A disturbance in the regular motion of a satellite

Types

Gravitational

Atmospheric Drag

Third Body Effects

Solar Wind/Radiation Effects

Electro-magnetic

Slide 43

PERTURBATIONS Gravitational: Libration

Ellipticity of the Earth causes gravity wells and hills

Stable points: 75E and 105W

-- Himalayas and Rocky Mountains

Unstable points: 165E and 5W

-- Marshall Islands and Portugal

Drives the requirement for station keeping

Slide 44

PERTURBATIONS Electro-Magnetic

Interaction between the Earth’s magnetic field and the satellite’s electro-magnetic field results in magnetic drag

Slide 45

References:

http://coastwatch.glerl.noaa.gov/modis/modis.cgi/modis?region=s&page=1

http://www.ssec.wisc.edu/data/geo/

http://www.rap.ucar.edu/weather/satellite/

http://www.ssec.wisc.edu/data/volcano.html

Space Systems Loral, 1996 : GOES I-M DataBook

Can be found online at: http://rsd.gsfc.nasa.gov/goes/text/goes.databook.html

NOAA KLM User’s Guide http://www2.ncdc.noaa.gov/docs/klm/index.htm

NOAA/NESDIS Office of Satellite Operations: http://www.oso.noaa.gov/goes/index.htm

NOAA/NESDIS Office of Satellite Data Processing and Distribution http://www.osdpd.noaa.gov/