GB1338081A - Doppler navigation radar equipment - Google Patents
Doppler navigation radar equipmentInfo
- Publication number
- GB1338081A GB1338081A GB2136970A GB2136970A GB1338081A GB 1338081 A GB1338081 A GB 1338081A GB 2136970 A GB2136970 A GB 2136970A GB 2136970 A GB2136970 A GB 2136970A GB 1338081 A GB1338081 A GB 1338081A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vibration
- navigator
- doppler
- amplitude modulation
- nature
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
- G01S13/60—Velocity or trajectory determination systems; Sense-of-movement determination systems wherein the transmitter and receiver are mounted on the moving object, e.g. for determining ground speed, drift angle, ground track
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4021—Means for monitoring or calibrating of parts of a radar system of receivers
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
1338081 Doppler radar T G THORNE 27 April 1971 [4 May 1970] 21369/70 Heading H4D An aircraft Doppler navigator in which vibration of the aircraft causes oscillation of the transmitted beam in the depression angle plane includes means for measuring the resultant amplitude modulation of the echo signals to indicate the nature of the overflown terrain. A pendulum or gyroscope vibration sensor 31 is energized by the detected output from the navigator 21 thus providing a signal representing the product of the vibration and received signal amplitudes. This is used as a reference signal in a PSD 26 which also receives the navigator 21 Doppler output and provides a signal representing the magnitude of the amplitude modulation in the received signals. Comparison with the vibration amplitude in comparator 34 indicates the nature of the terrain (i.e. land, rough or calm sea). The comparator outputs select an appropriate calibration constant for the receiver 21. In an alternative arrangement the amplitude modulation is detected by comparing the received signals from forward and rear looking beams followed by low pass filtering (Fig. 2, not shown).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2136970A GB1338081A (en) | 1971-04-27 | 1971-04-27 | Doppler navigation radar equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2136970A GB1338081A (en) | 1971-04-27 | 1971-04-27 | Doppler navigation radar equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1338081A true GB1338081A (en) | 1973-11-21 |
Family
ID=10161768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2136970A Expired GB1338081A (en) | 1971-04-27 | 1971-04-27 | Doppler navigation radar equipment |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1338081A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006002609A1 (en) * | 2006-01-16 | 2007-07-26 | Siemens Ag | Method for extending the measuring range of a measuring device and measuring device |
-
1971
- 1971-04-27 GB GB2136970A patent/GB1338081A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006002609A1 (en) * | 2006-01-16 | 2007-07-26 | Siemens Ag | Method for extending the measuring range of a measuring device and measuring device |
| DE102006002609B4 (en) * | 2006-01-16 | 2008-07-24 | Siemens Ag | Method for expanding the measuring range of a Doppler radar sensor and device for carrying out the method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |