FR38789E - Improvements in altitude measurement methods and devices - Google Patents
Improvements in altitude measurement methods and devicesInfo
- Publication number
- FR38789E FR38789E FR38789DA FR38789E FR 38789 E FR38789 E FR 38789E FR 38789D A FR38789D A FR 38789DA FR 38789 E FR38789 E FR 38789E
- Authority
- FR
- France
- Prior art keywords
- devices
- measurement methods
- altitude measurement
- altitude
- methods
- Prior art date
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR38789T | 1930-07-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR38789E true FR38789E (en) | 1931-07-18 |
Family
ID=8675252
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR38789D Expired FR38789E (en) | 1930-07-09 | 1930-07-09 | Improvements in altitude measurement methods and devices |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR38789E (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3994229A (en) * | 1957-09-17 | 1976-11-30 | The United States Of America As Represented By The Secretary Of The Navy | Pulse doppler proximity fuze |
US4214241A (en) * | 1944-03-11 | 1980-07-22 | Tellier Joseph C | Proximity control system |
-
1930
- 1930-07-09 FR FR38789D patent/FR38789E/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4214241A (en) * | 1944-03-11 | 1980-07-22 | Tellier Joseph C | Proximity control system |
US3994229A (en) * | 1957-09-17 | 1976-11-30 | The United States Of America As Represented By The Secretary Of The Navy | Pulse doppler proximity fuze |
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