FR958988A - - Google Patents
Info
- Publication number
- FR958988A FR958988A FR958988DA FR958988A FR 958988 A FR958988 A FR 958988A FR 958988D A FR958988D A FR 958988DA FR 958988 A FR958988 A FR 958988A
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
- G01S1/08—Systems for determining direction or position line
- G01S1/20—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems
- G01S1/22—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems the synchronised signals being frequency modulations on carrier waves and the transit times being compared by measuring difference of instantaneous frequencies of received carrier waves
-
- 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
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Radar Systems Or Details Thereof (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH655575X | 1939-10-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR958988A true FR958988A (fr) | 1950-03-22 |
Family
ID=4526476
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR958988D Expired FR958988A (fr) | 1939-10-19 |
Country Status (4)
Country | Link |
---|---|
US (1) | US2413620A (fr) |
CH (1) | CH223334A (fr) |
FR (1) | FR958988A (fr) |
GB (1) | GB655575A (fr) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2451823A (en) * | 1940-05-12 | 1948-10-19 | Radio Patents Corp | Direction finding system |
BE474193A (fr) * | 1945-02-24 | |||
US2724831A (en) * | 1946-04-19 | 1955-11-22 | Wallace Marcel | Navigational systems |
US2585605A (en) * | 1946-11-12 | 1952-02-12 | Wallace | Navigational system |
US2513320A (en) * | 1948-09-22 | 1950-07-04 | Seismograph Service Corp | Radio position determining system |
US2628351A (en) * | 1949-11-14 | 1953-02-10 | Mackta Leo | Low frequency simplified loran system |
US2682049A (en) * | 1949-12-14 | 1954-06-22 | Raytheon Mfg Co | Beat frequency navigation and guidance system |
US2602925A (en) * | 1950-04-20 | 1952-07-08 | Rca Corp | Radio navigation system |
US2754512A (en) * | 1951-06-26 | 1956-07-10 | Davis Harry | Fm long range navigation system |
US2907028A (en) * | 1953-02-20 | 1959-09-29 | Robert J Stirton | Apparatus for trajectory determination |
US3153220A (en) * | 1954-08-20 | 1964-10-13 | Hagemann Julius | Doppler log and plotter system |
US2837738A (en) * | 1955-08-10 | 1958-06-03 | Fairchild Engine & Airplane | Passive range measuring device |
GB887622A (en) * | 1959-05-12 | 1962-01-24 | Nat Res Dev | A frequency-modulation echo-sounder |
US4369444A (en) * | 1980-11-10 | 1983-01-18 | Grumman Aerospace Corporation | Multipath Doppler shift vertical speed measurement system |
-
0
- FR FR958988D patent/FR958988A/fr not_active Expired
-
1939
- 1939-10-19 CH CH223334D patent/CH223334A/de unknown
-
1940
- 1940-06-19 US US341225A patent/US2413620A/en not_active Expired - Lifetime
-
1947
- 1947-12-23 GB GB34092/47A patent/GB655575A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB655575A (en) | 1951-07-25 |
US2413620A (en) | 1946-12-31 |
CH223334A (de) | 1942-09-15 |