Rho-Rho Loran-C for Offshore Surveys
Using atomic clocks, the United States Coast Guard has recently pioneered a precise distance measuring version of Loran-C, for positioning by two ranges when within about 1,700 km of the transmitters. In May 1971 the authors took advantage of the calibrated Decca Lambda survey chain, being used by t...
Published in: | The Canadian Surveyor |
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Language: | English |
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Canadian Science Publishing
1972
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Online Access: | http://dx.doi.org/10.1139/tcs-1972-0032 http://www.nrcresearchpress.com/doi/pdf/10.1139/tcs-1972-0032 |
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crcansciencepubl:10.1139/tcs-1972-0032 2023-12-17T10:27:36+01:00 Rho-Rho Loran-C for Offshore Surveys Eaton, R. M. Grant, S. T. 1972 http://dx.doi.org/10.1139/tcs-1972-0032 http://www.nrcresearchpress.com/doi/pdf/10.1139/tcs-1972-0032 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining The Canadian Surveyor volume 26, issue 2, page 125-135 ISSN 0008-5103 General Earth and Planetary Sciences General Engineering General Environmental Science journal-article 1972 crcansciencepubl https://doi.org/10.1139/tcs-1972-0032 2023-11-19T13:38:46Z Using atomic clocks, the United States Coast Guard has recently pioneered a precise distance measuring version of Loran-C, for positioning by two ranges when within about 1,700 km of the transmitters. In May 1971 the authors took advantage of the calibrated Decca Lambda survey chain, being used by the CSS Baffin on the Grand Banks of Newfoundland, to evaluate the accuracy and reliability of this ‘rho-rho’ Loran-C. This paper outlines briefly the principles of Loran-C and the associated problems of geodesy and radio wave propagation. The procedures for operating rho-rho Loran-C are described and the results of short term (hours) and long-term (weeks) accuracy tests are given. Rho-rho Loran-C is an ‘extrapolative’ navigation system that requires periodic checks at a reference point to adjust accumulated error. It was found that, by taking reasonable precautions, range measuring accuracy of about 200 meters can be maintained over five days or so. Article in Journal/Newspaper Baffin Newfoundland Canadian Science Publishing (via Crossref) Lambda ENVELOPE(-62.983,-62.983,-64.300,-64.300) Rho ENVELOPE(-63.000,-63.000,-64.300,-64.300) Loran ENVELOPE(-55.609,-55.609,52.249,52.249) The Canadian Surveyor 26 2 125 135 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences General Engineering General Environmental Science |
spellingShingle |
General Earth and Planetary Sciences General Engineering General Environmental Science Eaton, R. M. Grant, S. T. Rho-Rho Loran-C for Offshore Surveys |
topic_facet |
General Earth and Planetary Sciences General Engineering General Environmental Science |
description |
Using atomic clocks, the United States Coast Guard has recently pioneered a precise distance measuring version of Loran-C, for positioning by two ranges when within about 1,700 km of the transmitters. In May 1971 the authors took advantage of the calibrated Decca Lambda survey chain, being used by the CSS Baffin on the Grand Banks of Newfoundland, to evaluate the accuracy and reliability of this ‘rho-rho’ Loran-C. This paper outlines briefly the principles of Loran-C and the associated problems of geodesy and radio wave propagation. The procedures for operating rho-rho Loran-C are described and the results of short term (hours) and long-term (weeks) accuracy tests are given. Rho-rho Loran-C is an ‘extrapolative’ navigation system that requires periodic checks at a reference point to adjust accumulated error. It was found that, by taking reasonable precautions, range measuring accuracy of about 200 meters can be maintained over five days or so. |
format |
Article in Journal/Newspaper |
author |
Eaton, R. M. Grant, S. T. |
author_facet |
Eaton, R. M. Grant, S. T. |
author_sort |
Eaton, R. M. |
title |
Rho-Rho Loran-C for Offshore Surveys |
title_short |
Rho-Rho Loran-C for Offshore Surveys |
title_full |
Rho-Rho Loran-C for Offshore Surveys |
title_fullStr |
Rho-Rho Loran-C for Offshore Surveys |
title_full_unstemmed |
Rho-Rho Loran-C for Offshore Surveys |
title_sort |
rho-rho loran-c for offshore surveys |
publisher |
Canadian Science Publishing |
publishDate |
1972 |
url |
http://dx.doi.org/10.1139/tcs-1972-0032 http://www.nrcresearchpress.com/doi/pdf/10.1139/tcs-1972-0032 |
long_lat |
ENVELOPE(-62.983,-62.983,-64.300,-64.300) ENVELOPE(-63.000,-63.000,-64.300,-64.300) ENVELOPE(-55.609,-55.609,52.249,52.249) |
geographic |
Lambda Rho Loran |
geographic_facet |
Lambda Rho Loran |
genre |
Baffin Newfoundland |
genre_facet |
Baffin Newfoundland |
op_source |
The Canadian Surveyor volume 26, issue 2, page 125-135 ISSN 0008-5103 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/tcs-1972-0032 |
container_title |
The Canadian Surveyor |
container_volume |
26 |
container_issue |
2 |
container_start_page |
125 |
op_container_end_page |
135 |
_version_ |
1785579494694715392 |