U.S. Geological Survey Professional Paper, Issue 1390U.S. Government Printing Office, 1987 |
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... vertically downward , makes dis- tance measurements to the Earth's surface along a path that roughly mirrors the aircraft flight path . In both technological domains , inertial guidance and electromagnetic distance measuring , the ...
... vertically downward , makes dis- tance measurements to the Earth's surface along a path that roughly mirrors the aircraft flight path . In both technological domains , inertial guidance and electromagnetic distance measuring , the ...
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... Vertical Datum revolutions per minute foot - candle ( ft - c ) * Exact conversion factor . television ** Basic SI unit . aExact conversion , except for geodetic surveying in the United States for which the conver- sion factor is ...
... Vertical Datum revolutions per minute foot - candle ( ft - c ) * Exact conversion factor . television ** Basic SI unit . aExact conversion , except for geodetic surveying in the United States for which the conver- sion factor is ...
Page 1
... vertical distance between the aircraft in flight and the land surface so that the desired terrain profile can be computed directly . The first , and by far the most complex , part of the strategy is achieved by use of an inertial ...
... vertical distance between the aircraft in flight and the land surface so that the desired terrain profile can be computed directly . The first , and by far the most complex , part of the strategy is achieved by use of an inertial ...
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... vertical measurements would only approach +1 ft ( 0.3 m ) and , in horizontal position , might range from tens to hundreds of feet ( 3-30 m ) . rather obvious facts : Very early in the development analysis , therefore , thought ...
... vertical measurements would only approach +1 ft ( 0.3 m ) and , in horizontal position , might range from tens to hundreds of feet ( 3-30 m ) . rather obvious facts : Very early in the development analysis , therefore , thought ...
Page 3
... vertical trace of flight path . c . Achieving absolute ( referenced to local control ) position and profile accuracies of ± 0.5 ft ( 0.15 m ) vertically and ± 2 ft ( 0.61 m ) horizon- tally . d . Deployment in relatively light fixed- or ...
... vertical trace of flight path . c . Achieving absolute ( referenced to local control ) position and profile accuracies of ± 0.5 ft ( 0.15 m ) vertically and ± 2 ft ( 0.61 m ) horizon- tally . d . Deployment in relatively light fixed- 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