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12/1 OSTA-1 (SIR-A) Synthetic aperture radar (SAR) 3600' of film (data recording) ~ 8 hours of data sensitive to altitude delta of +/- 2 km (because of pulse timing + return avg power ~ 750 watts (used for ops) - Test of SIR-A in PLB (on pad ?) for EMI potential on shuttle... fire any EMI ( 1 V/m) MT, Bob Blount ... get wt's equivalent of Nesbitt for OSTA (see Koons) 12/2 MET Update (SIR-A) possibilities: 1) nominal 2) MET update (ground tracks ~ same, PRF etc, still O.K.) 3) altitude delta so severe that all parameters need changing MET updates: at least 1, to as many as 1 per orbit updates req. every 24/m hrs, where m is nautical miles difference from nominal orbit