Other
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spie.6409e..29l&link_type=abstract
Lidar Remote Sensing for Environmental Monitoring VII. Edited by Singh, Upendra N.; Itabe, Toshikazu; Rao, D. Narayana. Procee
Other
Scientific paper
Present day remote sensing satellites orbiting in low earth orbit (LEO) have increasingly sophisticated and high resolution onboard sensors. Their frequency and area of observation is also increasing. This generates large volume of data which needs to be communicated. However their visibility to ground station is limited. Free space optical communication between remote sensing satellite in LEO and communication satellite in geostationary earth orbit (GEO) can be favorable approach. Subsequently GEO satellite relays the data to ground station. To demonstrate this, a concept model operating at data rates greater than 1 Gbps is under development at LEOS. The system consisting of laser transmitter with 20cm diameter telescope and receiver with 30cm telescope is planned. It uses commercially available optical and optoelectronic components. This concept model will demonstrate and verify link margins available as against expected. Subsequent to this, it is planned to concentrate on design and other issues involved in acquisition, tracking and pointing (ATP) due to highly narrow laser beam.
Kamalakar J. A.
Laxmiprasad A. S.
Raghubabu P.
Ranjith R.
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