AN EXPERIMENTAL INVESTIGATION OF THE CALIBRATION OF ERRORS IN PREDICTED LINES OF POSITION OF LOW-FREQUENCY HYPERBOLIC NAVIGATION SYSTEMS

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Abstract:

An experiment is described in the calibration of a low-frequency hyperbolic radio navigation system. It proposes that in low-frequency systems, irregularities in the true hyperbolic lines-ofposition grids as compared with the predicted grids are of such a nature that regularly spaced calibration at reasonable intervals would significantly improve the accuracy of the system. A typical low-frequency system was chosen for the experiment, and a representative portion of the system service area was calibrated by an airborne measurement of position indication and true position throughout the test area. The low-frequency system, position-instrumentation system, and conduct of the experiment are described. The improved accuracy that can be obtained at various levels of calibration effort is discussed, and a method of determining the station spacing required for certain levels of accuracy is developed. Author

Author(s):
O'day, James ; Porter, William ; Sullivan, Joseph
Author Organization(s):
MICHIGAN UNIV ANN ARBOR INST OF SCIENCE AND TECHNOLOGY
Pagination:
0001

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
2900 244 R
Contract/Grant Number(s):
DA36 039SC78801
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*CALIBRATION, *HYPERBOLIC NAVIGATION, *SURVEILLANCE DRONES, DATA PROCESSING, ELECTROMAGNETIC WAVE REFLECTIONS, ERRORS, FLIGHT TESTING, INSTRUMENTATION, LORAN, LOW FREQUENCY, MATHEMATICAL PREDICTION, NAVIGATION, PROPAGATION, RADIO NAVIGATION, RADIO WAVES, REDUCTION, RELIABILITY, SHORAN, STATISTICAL ANALYSIS
Keyword(s):
HIRAN, DECCA NAVIGATION SYSTEM
Report Date:
1961 Jun 01