An Analysis of Errors in the Geographic Referencing of Nimbus Cloud Pictures |
From inside the book
Results 1-4 of 4
Page 2
... horizon scanners which detect the earth and provide the required input to the horizon attitude computer which calculates pitch and roll errors * for input to the control system ... ATTITUDE CONTROL SYSTEM · Pitch and Roll Attitude Control ·
... horizon scanners which detect the earth and provide the required input to the horizon attitude computer which calculates pitch and roll errors * for input to the control system ... ATTITUDE CONTROL SYSTEM · Pitch and Roll Attitude Control ·
Page 3
... horizon attitude computer begins and ends at the points determined by the above criteria . Horizon Attitude Computer The horizon attitude computer operates on the square pulses received from the scanner system . Pitch error is obtained ...
... horizon attitude computer begins and ends at the points determined by the above criteria . Horizon Attitude Computer The horizon attitude computer operates on the square pulses received from the scanner system . Pitch error is obtained ...
Page 5
... horizon is 2 to 1 ( Reference 3 ) . In calculating the pitch and roll errors ... attitude computer . Component errors averaging .05 ° have been root- mean ... Attitude Error . Error Source 1 . Input Signal 2 . Control System 3 . Momentum ...
... horizon is 2 to 1 ( Reference 3 ) . In calculating the pitch and roll errors ... attitude computer . Component errors averaging .05 ° have been root- mean ... Attitude Error . Error Source 1 . Input Signal 2 . Control System 3 . Momentum ...
Page 6
... horizon attitude computer to obtain : 1. Attitude errors relative to the actual earth ; and 2. Attitude errors relative to the ideal earth . The satellite ... Attitude Data • Use Telemetered Attitude Data · Scanner Pulse Reconstruction.
... horizon attitude computer to obtain : 1. Attitude errors relative to the actual earth ; and 2. Attitude errors relative to the ideal earth . The satellite ... Attitude Data • Use Telemetered Attitude Data · Scanner Pulse Reconstruction.
Common terms and phrases
50 naut ANALYSIS OF ERRORS ANGLE FROM CENTER attitude control attitude error attitude from telemetered bolometer cause a maximum CENTER PICTURE PRINCIPAL cloud elements control system D-2137 National Aeronautics Darling data are expected determination of satellite earth error curve error due error is tolerable error of 50 error signal Eugene Figure B1 future Nimbus vehicles GEOGRAPHIC REFERENCING grid square GRIDDING ERROR naut gyro horizon attitude computer HRIR input signal error maximum gridding error maximum overall error mean cloud mean maximum gridding NASA TN NIMBUS CLOUD PICTURES orbital plane PICTURE PRINCIPAL POINT pitch and roll pitch axis pitch error PRINCIPAL POINT degrees projection plane REFERENCING OF NIMBUS right triangles roll and yaw roll error rotation satellite attitude scanner data Scanner Pulse Reconstruction scanner system side picture spherical triangle sun sensor Table 1a TECHNICAL NOTE D-2137 telemetered data TN D-2137 National total error TOTAL GRIDDING ERROR triangle R'P'A White Noise yaw error