U.S. Geological Survey Professional Paper, Issue 1390U.S. Government Printing Office, 1987 |
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Page 2
... elevation of the 100 - year ( 1 - percent chance of occurrence in any given year ) flood . The potential workload impact of this Congressional mandate upon hydrologist and cartographer alike was formidable . In the early 1970's ...
... elevation of the 100 - year ( 1 - percent chance of occurrence in any given year ) flood . The potential workload impact of this Congressional mandate upon hydrologist and cartographer alike was formidable . In the early 1970's ...
Page 9
... elevation , based on a geopotential surface termed the " geoid " and specifically on the National Geodetic Vertical Da- tum of 1929 ( NGVD of 1929 ) . This Earth - fixed coordi- nate system serves as the reference for all fully pro ...
... elevation , based on a geopotential surface termed the " geoid " and specifically on the National Geodetic Vertical Da- tum of 1929 ( NGVD of 1929 ) . This Earth - fixed coordi- nate system serves as the reference for all fully pro ...
Page 19
... elevation gimbal , the roll gimbal , and the enclosing case ( also color coded in black ) , respectively . The ... elevation and roll axes each have torque capabilities of 30 and 60 oz - in . ( or 0.21 and 0.42 N · m ) ...
... elevation gimbal , the roll gimbal , and the enclosing case ( also color coded in black ) , respectively . The ... elevation and roll axes each have torque capabilities of 30 and 60 oz - in . ( or 0.21 and 0.42 N · m ) ...
Page 20
... ELEVATION AXIS TORQUE MOTOR ELEVATION OR MIDDLE AXIS IMU ROLL GIMBAL ROLL AXIS TORQUE MOTOR STABLE PLATFORM AZIMUTH AXIS RESOLVER SUPPORT HOUSING OR CASE DIRECTION OF FLIGHT ROLL OR OUTER AXIS ROLL AXIS RESOLVER ELEVATION AXIS ...
... ELEVATION AXIS TORQUE MOTOR ELEVATION OR MIDDLE AXIS IMU ROLL GIMBAL ROLL AXIS TORQUE MOTOR STABLE PLATFORM AZIMUTH AXIS RESOLVER SUPPORT HOUSING OR CASE DIRECTION OF FLIGHT ROLL OR OUTER AXIS ROLL AXIS RESOLVER ELEVATION AXIS ...
Page 24
... elevation stabilization loop which obviously concerns aircraft " pitching " motion . Such motion tends , because of friction , to drag the elevation gimbal around the elevation axis which can prompt deviation signals from either one or ...
... elevation stabilization loop which obviously concerns aircraft " pitching " motion . Such motion tends , because of friction , to drag the elevation gimbal around the elevation axis which can prompt deviation signals from either one or ...
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Common terms and phrases
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