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Earth Resources Satellites
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absorption accuracy achieved aerial aircraft altitude angle angstroms aperture areas atmosphere balloon band bandwidth cameras cent Chapter cloud communication satellites cost coverage density determined Earth resources satellite Earth satellites Earth station Earth's surface efficiency electrical energy equator equipment example flight frequency geostationary orbit geostationary satellite global ground station Hawker Siddeley Dynamics hydrostatic equation ICBMs infrared Intelsat interrogation ionosphere laser launch levels longitude lunar magnetosphere ments meteorological micrometre microwave microwave beam miles military mission modulation NASA Nimbus noise observations oceans operational overall payload phase photographs position position fix possible programme radar radiation radio radiometers radiosonde range measurements received reconnaissance reconnaissance satellites rectenna relay reliability resolution rocket satellite systems sensors signal solar cells space spacecraft stage sub-system techniques television temperature thermal tion traffic control transmission transmitted transponders user craft vehicle velocity wavelength weather weight