SE8204526D0 - RADAR - Google Patents

RADAR

Info

Publication number
SE8204526D0
SE8204526D0 SE19828204526A SE8204526A SE8204526D0 SE 8204526 D0 SE8204526 D0 SE 8204526D0 SE 19828204526 A SE19828204526 A SE 19828204526A SE 8204526 A SE8204526 A SE 8204526A SE 8204526 D0 SE8204526 D0 SE 8204526D0
Authority
SE
Sweden
Prior art keywords
probability
difference
variances
iso
orientation
Prior art date
Application number
SE19828204526A
Other languages
Swedish (sv)
Other versions
SE8204526L (en
Inventor
A N * Whitehead E
Original Assignee
Marconi Avionics Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Marconi Avionics Ltd filed Critical Marconi Avionics Ltd
Publication of SE8204526D0 publication Critical patent/SE8204526D0/en
Publication of SE8204526L publication Critical patent/SE8204526L/en

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
    • G01S13/06—Systems determining position data of a target
    • G01S13/42—Simultaneous measurement of distance and other co-ordinates
    • G01S13/44—Monopulse radar, i.e. simultaneous lobing
    • 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
    • G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • 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
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G01S7/288—Coherent receivers
    • G01S7/2886—Coherent receivers using I/Q processing

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

In an airbourne ground-ranging monopulse radar system the sum (S), azimuth difference (A) and elevation difference (E) signals derived from a plurality of statistically-independent radar returns are analysed to obtain an estimate of the orientation of an iso-probability-density surface defining (with respect to corresponding coordinate axes) S, A and E amplitude combinations of a particular probability density. The orientation of this iso-probability surface indicates the target elevation off boresight, and is independent of any across-track ground slope. In a practical embodiment (fig. 8) the two difference signals are first split into separate in-phase and quadrature components A', A", E', E" relative to the sum signal S. Variances and co-variances of these four components and S are then derived (10 - 15), and an appropriate function thereof computed (16 - 22). <IMAGE>
SE8204526A 1981-07-31 1982-07-30 Airborne monopulse radar for measuring distance to the ground surface SE8204526L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB8123408.0A GB8123408D0 (en) 1981-07-31 1981-07-31 Radar ranging system

Publications (2)

Publication Number Publication Date
SE8204526D0 true SE8204526D0 (en) 1982-07-30
SE8204526L SE8204526L (en) 1995-12-13

Family

ID=10523587

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8204526A SE8204526L (en) 1981-07-31 1982-07-30 Airborne monopulse radar for measuring distance to the ground surface

Country Status (3)

Country Link
FR (1) FR2725526A1 (en)
GB (2) GB8123408D0 (en)
SE (1) SE8204526L (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69721085T2 (en) 1996-05-14 2004-04-22 Honeywell International Inc. Autonomous landing system
EP1072901B1 (en) * 1996-05-14 2003-07-09 AlliedSignal Inc. Autonomous landing guidance system
FR3027406B1 (en) * 2014-10-16 2020-10-09 Thales Sa ECARTOMETRY MEASUREMENT PROCESS INSENSITIVE TO PARASITE SIGNALS
FR3104268B1 (en) * 2019-12-04 2021-12-17 Thales Sa Method and device for measuring the height of an aircraft in flight relative to at least one point on the ground
RU2753370C1 (en) * 2020-11-09 2021-08-13 Владимир Иванович Винокуров Method for measuring angular coordinates and radio location target coordinator

Also Published As

Publication number Publication date
FR2725526A1 (en) 1996-04-12
SE8204526L (en) 1995-12-13
GB8123408D0 (en) 1995-11-08
GB2292032B (en) 1996-06-26
GB8220470D0 (en) 1995-11-22
GB2292032A (en) 1996-02-07

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