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Accession Number:
ADA090852
Title:
Geodetic Applications of Inertial Navigation Systems,
Descriptive Note:
Corporate Author:
ARMY ENGINEER TOPOGRAPHIC LABS FORT BELVOIR VA
Report Date:
1977-01-01
Pagination or Media Count:
31.0
Abstract:
The most dominate error source in position determinations are in poor calibration procedures, misalignment of the accelerometers about their axes platform drift and deflections of the vertical and unnecessary shocks and vibrations to the system. An analysis of data in the gravity tables show that the system is capable of measuring delta g with an RMS of slightly better than 2 micro gs and that these measurements could be improved with a decrease of heading sensitivity by the system. An analysis of the data in the tables for the deflections of the vertical show that the data is highly influenced by the change in gyro drift rates as a result of heading changes of the system. When the system operates along a fairly straight line small azimuth changes deflections of the vertical can be determined with a RMS of one and one half seconds or better. It is believed that the following changes would improve the operations of the IPSRGSS 1 Better isolation of the system from shock and vibration, 2 Redesign the calibration procedure for the system, 3 Attempt to compensate for the effects of heading sensitivity, 4 Allow input into the system for the change in Azimuth caused by deflection of the vertical at the initial station, and 5 Change the smoothing program after the first four items are accomplished.
Distribution Statement:
APPROVED FOR PUBLIC RELEASE
