Research And Technology : Annual Report of the Goddard Space Flight Center 1989
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OSL will fly 20 charge-coupled-device cameras, generating 20 Mbps of real-time science data. NASA's TDRSS is required for all OSL communications. OSL will schedule the high gain K-band single-access TDRSS service for real-time science telemetry or for play- back of the onboard recorders at the 20- Mbps rate. Because of its orbit, OSL has visibility of at least one TDRSS satel- lite 97 percent of the time. This visibility time will permit almost continuous monitoring of OSL via the low-rate S- b...and multiple-access link, which does not require TDRSS to point its high-gain antennas at OSL. OSL will use this link routinely to send a full Sun image, which can be used for science planning and targeting, to the Science Opera- tions Facility. Also, the OSL Project Operations Control Center at Goddard will maintain 24-hour command and housekeeping coverage via this link. Because of its Sun-synchronous polar orbit, OSL will see the Sun without interruption for about 9 months each The OSL Phase-A conceptual design.
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