Aircraft altitude determination using multipath information in an angle-measuring navigation satellite system
In an angle-measuring navigation satellite system using a pair of crossed interferometers located on a satellite in synchronous orbit, three parameters are needed to determine a user's position unambiguously. These are the phase differences between received signals which were transmitted by the...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19720004928 2023-05-15T17:32:17+02:00 Aircraft altitude determination using multipath information in an angle-measuring navigation satellite system Kurjan, D. Unclassified, Unlimited, Publicly available Sep 30, 1971 application/pdf http://hdl.handle.net/2060/19720004928 unknown Document ID: 19720004928 Accession ID: 72N12577 http://hdl.handle.net/2060/19720004928 No Copyright CASI NAVIGATION NASA-CR-124625 REPT-72-12 1971 ftnasantrs 2019-07-21T11:41:27Z In an angle-measuring navigation satellite system using a pair of crossed interferometers located on a satellite in synchronous orbit, three parameters are needed to determine a user's position unambiguously. These are the phase differences between received signals which were transmitted by the two antennas on each of the two interferometers, and the user's altitude. The two phase difference measurements yield a line of possible user locations, and the addition of the altitude measurement reduces this line to a single point. A method is proposed which makes use of the navigation signals received after reflection off the earth's surface. The iterative procedure employs the arrival time difference between direct and reflected signals. Based on previous calculations of errors in measuring the electrical parameters it is concluded that, for North Atlantic coverage and specular reflection, altitude measurements can be made with a 1-sigma error of 65 meters. Other/Unknown Material North Atlantic NASA Technical Reports Server (NTRS) |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
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NAVIGATION |
spellingShingle |
NAVIGATION Kurjan, D. Aircraft altitude determination using multipath information in an angle-measuring navigation satellite system |
topic_facet |
NAVIGATION |
description |
In an angle-measuring navigation satellite system using a pair of crossed interferometers located on a satellite in synchronous orbit, three parameters are needed to determine a user's position unambiguously. These are the phase differences between received signals which were transmitted by the two antennas on each of the two interferometers, and the user's altitude. The two phase difference measurements yield a line of possible user locations, and the addition of the altitude measurement reduces this line to a single point. A method is proposed which makes use of the navigation signals received after reflection off the earth's surface. The iterative procedure employs the arrival time difference between direct and reflected signals. Based on previous calculations of errors in measuring the electrical parameters it is concluded that, for North Atlantic coverage and specular reflection, altitude measurements can be made with a 1-sigma error of 65 meters. |
format |
Other/Unknown Material |
author |
Kurjan, D. |
author_facet |
Kurjan, D. |
author_sort |
Kurjan, D. |
title |
Aircraft altitude determination using multipath information in an angle-measuring navigation satellite system |
title_short |
Aircraft altitude determination using multipath information in an angle-measuring navigation satellite system |
title_full |
Aircraft altitude determination using multipath information in an angle-measuring navigation satellite system |
title_fullStr |
Aircraft altitude determination using multipath information in an angle-measuring navigation satellite system |
title_full_unstemmed |
Aircraft altitude determination using multipath information in an angle-measuring navigation satellite system |
title_sort |
aircraft altitude determination using multipath information in an angle-measuring navigation satellite system |
publishDate |
1971 |
url |
http://hdl.handle.net/2060/19720004928 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
CASI |
op_relation |
Document ID: 19720004928 Accession ID: 72N12577 http://hdl.handle.net/2060/19720004928 |
op_rights |
No Copyright |
_version_ |
1766130331895726080 |