IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
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| 출원번호 |
US-0292767
(1981-08-06)
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발명자
/ 주소 |
- Alsup James M. (San Diego) Jelks Edward C. (San Diego CA)
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| 출원인 / 주소 |
- The United States of America as represented by the Secretary of the Navy (Washington DC 06)
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| 인용정보 |
피인용 횟수 :
93 인용 특허 :
0 |
초록
▼
An apparatus determines the location of a signal source having coordinates (x,y). The source may be located as far away as two thousand km and does not require knowledge of ionospheric height or layer structure. The apparatus comprises at least three receivers adapted to receive the signals from the
An apparatus determines the location of a signal source having coordinates (x,y). The source may be located as far away as two thousand km and does not require knowledge of ionospheric height or layer structure. The apparatus comprises at least three receivers adapted to receive the signals from the signal source. The coordinates, (x1,y1), (x2,y2) and (x3,y3), of each of the receivers are very precisely known. One receiver is capable of receiving signals from the other two receivers through different means (e.g. a wide-band telephone link). A plurality of at least three timers, one connected to each receiver, measures precisely the time difference of arrival (TDOA) of the signals from the signal source. A plurality of at least three means, connected one to each of the receiving means, determine the vertical angles f
대표청구항
▼
System for determining the location of a signal source having coordinates (x,y), which are to be determined, and which may be located as far away as 2000 km, the system not requiring knowledge of ionospheric height or layer structure, comprising: a plurality of at least three signal receiving means,
System for determining the location of a signal source having coordinates (x,y), which are to be determined, and which may be located as far away as 2000 km, the system not requiring knowledge of ionospheric height or layer structure, comprising: a plurality of at least three signal receiving means, adapted to receive the signals from the signal source, the receiving means being located in a non-colinear relationship with respect to each other, however, the coordinates (x1,y1), (x2,y2) and (x3,y3) of each of the receivers being very precisely known, each means for receiving being capable of receiving signals from the other two receivers; a plurality of at least three measuring means, one connected to each receiving means, for measuring precisely the time difference of arrival (TDOA) of the signals from the signal source; a plurality of at least two means, connected to at least two of the receiving means, for determining the vertical angle qi, i=1, 2 or 3, at which the signal from the signal source is received by the receivers; and means for calculating the coordinates (x,y) of the signal source from the measured vertical angles and the time delays of arrival.
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