Optical terminals for microsatellite swarms

Details Optical terminals for microsatellite swarms Optical terminals for microsatellite swarms

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002spie.4635..202l&link_type=abstract

Proc. SPIE Vol. 4635, p. 202-214, Free-Space Laser Communication Technologies XIV, G. Stephen Mecherle; Ed.

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We studied terminal architectures and configurations for optical cross-links within microsatellite swarms and assessed the applicability of available technologies. Typical applications for microsatellite swarms are phased array telescopes, interferometric missions, and space-based radar. Key drivers for an optical terminal are well-developed technology and ruggedness. The terminal should do without automatic tracking or fine pointing, coarse pointing should be simple. As an example we cover a scenario where four microsatellites form a planar, square formation of 1 km side length, where the data rate is 100 kbit/s, and where an active double-pass lidar between each of the satellites provides a ranging accuracy of better than 10 m. The terminal transmit power is some 160 mW at a wavelength of 980 nm, the receive apertures have a diameter of 5 mm, and the size, weight, and power requirement of one terminal is estimated to be 60X80X70 mm3, 900 g, and 5 W, respectively.

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