NL278444A - - Google Patents
Info
- Publication number
- NL278444A NL278444A NL278444DA NL278444A NL 278444 A NL278444 A NL 278444A NL 278444D A NL278444D A NL 278444DA NL 278444 A NL278444 A NL 278444A
- Authority
- NL
- Netherlands
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
- G01S3/46—Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
- G01S3/46—Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
- G01S3/50—Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems the waves arriving at the antennas being pulse modulated and the time difference of their arrival being measured
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
- G01S3/52—Systems for determining direction or deviation from predetermined direction using a receiving antenna moving, or appearing to move, in a cyclic path to produce a Doppler variation of frequency of the received signal
- G01S3/54—Systems for determining direction or deviation from predetermined direction using a receiving antenna moving, or appearing to move, in a cyclic path to produce a Doppler variation of frequency of the received signal the apparent movement of the antenna being produced by coupling the receiver cyclically and sequentially to each of several fixed spaced antennas
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB17570/61A GB959106A (en) | 1961-05-15 | 1961-05-15 | Improvements in or relating to radio direction finders |
Publications (1)
Publication Number | Publication Date |
---|---|
NL278444A true NL278444A (de) |
Family
ID=10097499
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL278444D NL278444A (de) | 1961-05-15 |
Country Status (5)
Country | Link |
---|---|
US (1) | US3196439A (de) |
DE (1) | DE1261905B (de) |
GB (1) | GB959106A (de) |
NL (1) | NL278444A (de) |
SE (1) | SE317114B (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4888593A (en) * | 1987-12-15 | 1989-12-19 | Signal Science, Inc. | Time difference of arrival geolocation method, etc. |
US8134493B2 (en) * | 2009-07-02 | 2012-03-13 | Raytheon Company | System and method for precision geolocation utilizing multiple sensing modalities |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2287174A (en) * | 1939-09-16 | 1942-06-23 | Bell Telephone Labor Inc | Relative phase measuring circuit and method |
DE911223C (de) * | 1940-06-22 | 1954-05-10 | Atlas Werke Ag | Verfahren und Vorrichtung zur Entfernungs- und (oder) Richtungsbestimmung nach der Echomethode |
US2415955A (en) * | 1942-02-28 | 1947-02-18 | Rca Corp | Radio direction finding |
US2434915A (en) * | 1942-05-11 | 1948-01-27 | Standard Telephones Cables Ltd | Radio beacon system for bearing determination |
US2422122A (en) * | 1942-08-28 | 1947-06-10 | Rca Corp | Radio direction finding |
US2489304A (en) * | 1945-06-27 | 1949-11-29 | Standard Telephones Cables Ltd | Direction finder |
US3078415A (en) * | 1949-06-29 | 1963-02-19 | Raytheon Co | Phase measuring devices |
US2684474A (en) * | 1951-04-20 | 1954-07-20 | Us Army | Meteorological telemetering system |
US2637841A (en) * | 1951-04-20 | 1953-05-05 | Us Army | Position finding of electrical disturbances |
US2996712A (en) * | 1951-05-05 | 1961-08-15 | Hazeltine Research Inc | Wave-signal direction-indicating apparatus |
-
0
- NL NL278444D patent/NL278444A/xx unknown
-
1961
- 1961-05-15 GB GB17570/61A patent/GB959106A/en not_active Expired
-
1962
- 1962-05-07 SE SE5071/62A patent/SE317114B/xx unknown
- 1962-05-09 US US193442A patent/US3196439A/en not_active Expired - Lifetime
- 1962-05-12 DE DEM52838A patent/DE1261905B/de active Pending
Also Published As
Publication number | Publication date |
---|---|
DE1261905B (de) | 1968-02-29 |
SE317114B (de) | 1969-11-10 |
GB959106A (en) | 1964-05-27 |
US3196439A (en) | 1965-07-20 |