GB814744A - Improvements in world wide navigational system - Google Patents
Improvements in world wide navigational systemInfo
- Publication number
- GB814744A GB814744A GB3734655A GB3734655A GB814744A GB 814744 A GB814744 A GB 814744A GB 3734655 A GB3734655 A GB 3734655A GB 3734655 A GB3734655 A GB 3734655A GB 814744 A GB814744 A GB 814744A
- Authority
- GB
- United Kingdom
- Prior art keywords
- craft
- earth
- angle
- gyroscope
- reference unit
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Navigation (AREA)
Abstract
814,744. Radio-direction finding. GENERAL PRECISION LABORATORY Inc. Dec. 29, 1955, No. 37346/55. Drawings to Specification. Class 40 (7). [Also in Group XX] In an aircraft great circle, radio-echo navigation system in which a craft may home on a selected point without terrestial or celestial fixes, other than the initial one, to allow for the inaccuracies introduced by the convergence of meridians at the Poles of the Earth, the computing co-ordinate system is automatically rotated by one right-angle to form a transverse co-ordinate system, when the craft is at a specified distance from the Poles. The integrators which compute the instantaneous craft position operate in terms of the transverse co-ordinate system and can owing to the coordinate change, operate normally so as to continuously integrate the orthogonal components of the ground speed vector. The craft ground speed and drift angle are determined by a Doppler radar system of the pulse type, having three directive arrays to provide forward and laterally directed beams inclined towards the Earth. The ground track angle is determined by a heading reference unit which combines the heading angle with the drift angle. The instantaneous latitude and longitude, which are computed by combining the outputs of the Doppler system and the reference unit, are applied to a second computer which derives the great circle course and the distance to destination. The output of the magnetic compass of the heading reference unit is stabilized against high-frequency oscillations by a feed-back loop and when, at the North Pole, it fails to function, it is replaced by a directional gyroscope. In addition, a correction for magnetic variation with position is added. The gyroscope is normally monitored from the magnetic compass by means of a second feed-back loop which is supplied with information from the longitude and latitude computer which corrects the gyroscope for both the Earth's rotation and the relative movement of the craft and Earth.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB814744A true GB814744A (en) | 1959-06-10 |
Family
ID=34317897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3734655A Expired GB814744A (en) | 1955-12-29 | Improvements in world wide navigational system |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB814744A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9562788B1 (en) * | 2011-09-30 | 2017-02-07 | Rockwell Collins, Inc. | System and method for doppler aided navigation using weather radar |
| US9733349B1 (en) | 2007-09-06 | 2017-08-15 | Rockwell Collins, Inc. | System for and method of radar data processing for low visibility landing applications |
| US9939526B2 (en) | 2007-09-06 | 2018-04-10 | Rockwell Collins, Inc. | Display system and method using weather radar sensing |
| US10228460B1 (en) | 2016-05-26 | 2019-03-12 | Rockwell Collins, Inc. | Weather radar enabled low visibility operation system and method |
| US10353068B1 (en) | 2016-07-28 | 2019-07-16 | Rockwell Collins, Inc. | Weather radar enabled offshore operation system and method |
| US10705201B1 (en) | 2015-08-31 | 2020-07-07 | Rockwell Collins, Inc. | Radar beam sharpening system and method |
| US10928510B1 (en) | 2014-09-10 | 2021-02-23 | Rockwell Collins, Inc. | System for and method of image processing for low visibility landing applications |
| CN114001731A (en) * | 2021-10-12 | 2022-02-01 | 苏州大学 | Polar region inertial navigation phase modulation damping method and system under virtual sphere model |
-
1955
- 1955-12-29 GB GB3734655A patent/GB814744A/en not_active Expired
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9733349B1 (en) | 2007-09-06 | 2017-08-15 | Rockwell Collins, Inc. | System for and method of radar data processing for low visibility landing applications |
| US9939526B2 (en) | 2007-09-06 | 2018-04-10 | Rockwell Collins, Inc. | Display system and method using weather radar sensing |
| US9562788B1 (en) * | 2011-09-30 | 2017-02-07 | Rockwell Collins, Inc. | System and method for doppler aided navigation using weather radar |
| US10928510B1 (en) | 2014-09-10 | 2021-02-23 | Rockwell Collins, Inc. | System for and method of image processing for low visibility landing applications |
| US10705201B1 (en) | 2015-08-31 | 2020-07-07 | Rockwell Collins, Inc. | Radar beam sharpening system and method |
| US10228460B1 (en) | 2016-05-26 | 2019-03-12 | Rockwell Collins, Inc. | Weather radar enabled low visibility operation system and method |
| US10955548B1 (en) | 2016-05-26 | 2021-03-23 | Rockwell Collins, Inc. | Weather radar enabled low visibility operation system and method |
| US10353068B1 (en) | 2016-07-28 | 2019-07-16 | Rockwell Collins, Inc. | Weather radar enabled offshore operation system and method |
| CN114001731A (en) * | 2021-10-12 | 2022-02-01 | 苏州大学 | Polar region inertial navigation phase modulation damping method and system under virtual sphere model |
| CN114001731B (en) * | 2021-10-12 | 2023-03-07 | 苏州大学 | Polar region inertial navigation phase modulation damping method and system under virtual sphere model |
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