Loran-Based Buoy Position Auditing Systems - Analytical Evaluation

Wolfson, J. A.; Engels, P. D.; Poppe, M. C., Jr.; Foltz, J. M.; DePalma, L. M.; John A. Volpe National Transportation Systems Center, (U.S.)

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Loran-Based Buoy Position Auditing Systems - Analytical Evaluation

1980-02-01
By Wolfson, J. A. ; Engels, P. D. ; Poppe, M. C., Jr. ; ...

[PDF-4.67 MB]

English

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Creators:

Wolfson, J. A. ; Engels, P. D. ; Poppe, M. C., Jr. ; Foltz, J. M. ; DePalma, L. M.

Wolfson, J. A. ; Engels, P. D. ; Poppe, M. C., Jr. ; Foltz, J. M. ; DePalma, L. M. Less -
Corporate Creators:

John A. Volpe National Transportation Systems Center, (U.S.)
Corporate Contributors:

United States. Coast Guard
Subject/TRT Terms:

[+]

Accuracy Buoys Digital Computers Errors Helicopters Loran Mathematical Models Position Fixing Radio Receivers Radio Transmitters Rangefinders Variables
Publication/ Report Number:

TSC-USCG-80-2 ; USCG-D-09-80

TSC-USCG-80-2 ; USCG-D-09-80 Less -
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

United States. Coast Guard
NTL Classification:

NTL-MARINE/WATERWAYS TRANSPORTATION-MARINE/WATERWAYS TRANSPORTATION;NTL-MARINE/WATERWAYS TRANSPORTATION-Marine Planning and Policy;NTL-MARINE/WATERWAYS TRANSPORTATION-Marine Safety;NTL-MARINE/WATERWAYS TRANSPORTATION-U.S. Coast Guard;
Abstract:

An analytic evaluation and comparison of the following candidate Buoy Position Auditing System (BPAS) configurations is presented in this report: transmission of digital Time Difference (TD) data from a Loran-C receiver on the buoy, retransmission of Loran-C pulses from the buoy, and combination of helicopter Loran-C data and helicopter-to-buoy microwave ranging data in a variable geometry solution. The candidate BPAS configurations utilize Loran-C in the differential mode. A model is developed to characterize differential Loran-C errors, accounting for the expected effect of the land/sea water conductivity interface. The error model is utilized alone, or with a microwave ranging system error model, to estimate buoy position-fix accuracy afforded by each BPAS configuration. Accuracy estimates and data on cost, complexity, and technical risk are employed to recommend a BPAS configuration for testing. It is concluded that Loran-C pulse retransmission is not a viable BPAS configuration. The variable geometry BPAS configuration is highly accurate, due to calibration of Loran-C errors by processing of redundant data, but is not presently cost-effective. The digital TD transmission BPAS configuration is recommended for testing, due to its simplicity and low cost.
Format:

PDF
Collection(s):

Volpe Center
Main Document Checksum:

[+]

urn:sha256:98e067ee95c559830f8410366399c25c39c475f59366dd8083e85148325720fd
Download URL:

https://rosap.ntl.bts.gov/view/dot/11741/dot_11741_DS1.pdf
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Loran-Based Buoy Position Auditing Systems - Analytical Evaluation

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