U.S. Geological Survey Professional Paper, Issue 1390U.S. Government Printing Office, 1987 |
From inside the book
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Page 1
... velocity information at approxi- mately 200 - second intervals . This requirement is met by a gimbaled two - axis laser tracker , which measures distances and directions to a select number of ground - based retroreflectors which have ...
... velocity information at approxi- mately 200 - second intervals . This requirement is met by a gimbaled two - axis laser tracker , which measures distances and directions to a select number of ground - based retroreflectors which have ...
Page 4
... velocity vector ) information at 3 - minute in- tervals during the flight mission . 3. The update information required by the system can be supplied by an onboard tracker component . 4. The inertial and tracker components should be ...
... velocity vector ) information at 3 - minute in- tervals during the flight mission . 3. The update information required by the system can be supplied by an onboard tracker component . 4. The inertial and tracker components should be ...
Page 8
... velocity as long as no force acts on it . The second law states that the acceleration of a particle is directly proportional to the resultant external force acting on the particle and is inversely proportional to the mass of the ...
... velocity as long as no force acts on it . The second law states that the acceleration of a particle is directly proportional to the resultant external force acting on the particle and is inversely proportional to the mass of the ...
Page 9
... velocity and position ; an updating de- vice to correct or compensate for errors in naviga- tor velocity and position caused by time - dependent drifts of gyros and other instrument components ; and housing materials to interconnect ...
... velocity and position ; an updating de- vice to correct or compensate for errors in naviga- tor velocity and position caused by time - dependent drifts of gyros and other instrument components ; and housing materials to interconnect ...
Page 11
... Velocity ) ] [ Precession Rate ] 3 . ( N · m ) ( m2kg ) ( rad / s ) ( rad / s ) Shown parenthetically below each quantity are the SI ( International System ) units in which it is commonly expressed ( see also list of " Symbols and ...
... Velocity ) ] [ Precession Rate ] 3 . ( N · m ) ( m2kg ) ( rad / s ) ( rad / s ) Shown parenthetically below each quantity are the SI ( International System ) units in which it is commonly expressed ( see also list of " Symbols and ...
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acceleration accelerometer accuracy aerial profiling AERIAL SURVEY air loop airborne angular APT sys APT system axes azimuth CALIBRATE AND ALINE commands components Compute IMU CONTROL POINT DeHavilland Twin Otter device Draper Laboratory Earth electrical electronics elevation error field flight mission flight path foregoing function ground-control points gyro Hanscom Field Harry Diamond horizontal IMU and tracker incl inertial measurement unit inertial navigator input axis instrument system intervals Kalman filter keyboard laser beam laser profiler laser tracker latitude magnetic tape mode Model motion mounted newton meter optics orientation orthogonal output performance plasma display position coordinates precession precision printer processor profiling of terrain pulse retroreflector target rotation rotor schematic sequence signal SIXTY SECOND specific force spin axis stable platform subsystems temperature terrain profiles terrain system thermal tion torque motors tracker gimbal angles tracking U.S. Geological Survey update velocity vertical