GB1481545A - Methods of determining the range of infrared equipment - Google Patents

Methods of determining the range of infrared equipment

Info

Publication number
GB1481545A
GB1481545A GB4567274A GB4567274A GB1481545A GB 1481545 A GB1481545 A GB 1481545A GB 4567274 A GB4567274 A GB 4567274A GB 4567274 A GB4567274 A GB 4567274A GB 1481545 A GB1481545 A GB 1481545A
Authority
GB
United Kingdom
Prior art keywords
equipment
range
maximum detection
detection range
temperature contrast
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
Application number
GB4567274A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB4567274A priority Critical patent/GB1481545A/en
Publication of GB1481545A publication Critical patent/GB1481545A/en
Expired legal-status Critical Current

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
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/12—Systems for determining distance or velocity not using reflection or reradiation using electromagnetic waves other than radio waves

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1481545 Infra-red tracking equipment G PUSCH 22 Oct 1974 45672/74 Heading H4D To determine the maximum detection range R of passive infra-red tracking equipment, the visual range of the equipment, the humidity of the atmosphere, the temperature contrast of the target (against background) and the sensitivity of the equipment are determined and these factors used to calculate said maximum detection range. The maximum detection range is part limited by atmospheric attenuation a t , which is made up of two parts-attenuation due to water absorption (a a ) and attenuation due to scattering (a s )-i.e. a a is calculated from the humidity (which is measurable by a variable electrical resistance) and a s is calculated from the visual range. A formula K=minimum temperature contrast detectable by the equipment, and is determined from said sensitivity. K 0 = temperature contrast of the target. is used and implemented in a computer to determine R.
GB4567274A 1974-10-22 1974-10-22 Methods of determining the range of infrared equipment Expired GB1481545A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4567274A GB1481545A (en) 1974-10-22 1974-10-22 Methods of determining the range of infrared equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4567274A GB1481545A (en) 1974-10-22 1974-10-22 Methods of determining the range of infrared equipment

Publications (1)

Publication Number Publication Date
GB1481545A true GB1481545A (en) 1977-08-03

Family

ID=10438126

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4567274A Expired GB1481545A (en) 1974-10-22 1974-10-22 Methods of determining the range of infrared equipment

Country Status (1)

Country Link
GB (1) GB1481545A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2775084A1 (en) * 1987-05-05 1999-08-20 Secr Defence Brit PASSIVE TELEMETER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2775084A1 (en) * 1987-05-05 1999-08-20 Secr Defence Brit PASSIVE TELEMETER

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee