MTU GE 4250 - Satellite orbits Lecture Notes (34 pages)

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Satellite orbits Lecture Notes



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Satellite orbits Lecture Notes

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Pages:
34
School:
Michigan Tech
Course:
Ge 4250 - Fund Remote Sensing

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Satellite orbits Satellite orbits Satellites and their orbits GEO LEO Special orbits e g L1 Satellite sensor types Whiskbroom Pushbroom Pixel size calculation Launch Launch of Aura satellite July 15 2004 Vandenberg CA 96 fuel 4 payload Recent launch failures Orbiting Carbon Observatory OCO Glory Satellite orbits Launch Determined by Kepler s Laws of Aura satellite July 15 2004 Planets and satellites move in elliptical orbits Vandenberg CA The square of the orbital period is proportional to the cube of the semi major axis of the orbit Altered by atmospheric drag gravity of Sun and Moon Orbital period time taken for satellite to circle the Earth 3 a P0 2 GM P0 orbital period a semi major axis of ellipse satellite altitude Earth radius 6380 km G Gravitational constant M mass of Earth GM 3 986 1014 m3 s 2 NB This assumes that the Earth is spherically symmetric it isn t Geostationary orbits GEO Launch of Aura satellite 15 2004 July Special type of geosynchronous Vandenberg CA orbit Orbital period period of Earth s rotation 86164 seconds for a sidereal day Circular orbit around the equator with zero inclination Orbit is stationary with respect to a location on the Earth Advantages high temporal resolution always visible e g weather forecasting communications 5 15 minutes Disadvantages cost lower spatial resolution than polarorbiting sensors poor coverage of high latitudes 55 N S GOES East US 75 W GOES West US 135 W MTSAT Japan 140 E Fengyun FY 2E China 112 E Kalpana India 74 E Meteosat 7 Europe 57 E Meteosat 9 Europe 0 E GOES Super Rapid Scan http cimss ssec wisc edu goes blog archives 6849 Polar or Low Earth orbits LEO Launch of Aura satellite July 15 2004 Vandenberg CA Polar or Low Earth orbits LEO of Aura satellite Launch Useful altitude range 500 2000 km above Earth s surface July 15 2004 CA by atmospheric friction and van Allen belts high Vandenberg Constrained flux of energetic charged particles Because Earth is not spherical polar orbits precess rotate about the



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