SE8002077L - METHOD SYSTEM FOR DETERMINING EARTH REFRACTION - Google Patents

METHOD SYSTEM FOR DETERMINING EARTH REFRACTION

Info

Publication number
SE8002077L
SE8002077L SE8002077A SE8002077A SE8002077L SE 8002077 L SE8002077 L SE 8002077L SE 8002077 A SE8002077 A SE 8002077A SE 8002077 A SE8002077 A SE 8002077A SE 8002077 L SE8002077 L SE 8002077L
Authority
SE
Sweden
Prior art keywords
refraction
geodesic
measuring
sound
time difference
Prior art date
Application number
SE8002077A
Other languages
Unknown language ( )
Swedish (sv)
Inventor
W Meyl
H Stegemann
P Hentschel
Original Assignee
Zeiss Jena Veb Carl
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 Zeiss Jena Veb Carl filed Critical Zeiss Jena Veb Carl
Publication of SE8002077L publication Critical patent/SE8002077L/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/02—Analysing fluids
    • G01N29/024—Analysing fluids by measuring propagation velocity or propagation time of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
    • G01C15/002—Active optical surveying means

Abstract

The measuring arrangement for determining terrestrial refraction is applied in geodesic measurements (trigonometric altitude transfers, in staking out and in precision tachymetry, steering construction machinery by means of a laser beam, precision levelling). The measuring arrangement includes a geodesic measuring instrument (T), an electronic processor and an appliance (S, E) for measuring the transit-time difference of sound waves. After the sound waves generated by a sound transmitter part (S) have traversed layers of air (e.g. at different altitude) on a representative path, the time difference is measured and employed to determine the refraction. The sound receiver part (E) includes two microphones (M1) and (M2) which are positioned vertically above one another at altitudes (Z1) and (Z2) above the surface of the earth in the immediate vicinity of the electronic tachymeter. Using the arrangement it becomes possible to determine, for a particular range as defined from the position of the instrument, continuous measured values from which the instantaneous refraction can be inferred. Terrestrial refraction can be determined more accurately than in conventional methods for engineering geodesic and constructional work. <IMAGE>
SE8002077A 1979-03-19 1980-03-17 METHOD SYSTEM FOR DETERMINING EARTH REFRACTION SE8002077L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD21164079A DD142384A1 (en) 1979-03-19 1979-03-19 MEASURING ARRANGEMENT FOR DETERMINING THE TERRESTRIAL REFRACTION

Publications (1)

Publication Number Publication Date
SE8002077L true SE8002077L (en) 1980-09-20

Family

ID=5517209

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8002077A SE8002077L (en) 1979-03-19 1980-03-17 METHOD SYSTEM FOR DETERMINING EARTH REFRACTION

Country Status (4)

Country Link
CH (1) CH647078A5 (en)
DD (1) DD142384A1 (en)
DE (1) DE3010058A1 (en)
SE (1) SE8002077L (en)

Also Published As

Publication number Publication date
DD142384A1 (en) 1980-06-18
DE3010058A1 (en) 1980-10-02
CH647078A5 (en) 1984-12-28

Similar Documents

Publication Publication Date Title
Pollard et al. A method for calibrating shipmounted acoustic Doppler profilers and the limitations of gyro compasses
US5345241A (en) Self-contained method for correction of an inertial system over a body of water
CN108174442A (en) A kind of underwater works crack repair robot Sensor Network position finding and detection method
CN108592873B (en) Vehicle-mounted altimeter based on LDV/INS combination and method thereof
JPS5825207B2 (en) Device for setting each point and straight line
EP1149268B1 (en) Method for improving measurements by laser interferometer
SE8002077L (en) METHOD SYSTEM FOR DETERMINING EARTH REFRACTION
US3531764A (en) Wind compensated acoustic direction finder
JP2859218B2 (en) Light receiving position detector
RU2178147C1 (en) Complex navigation system
JPH0785019B2 (en) Heading measurement device
CN109813234A (en) A kind of Laser Displacement Sensor based on CCD
US5381383A (en) Sonar transducer calibration apparatus and method
RU2029238C1 (en) Barometer levelling method
JP2560229B2 (en) Measuring device for unevenness of the ground such as flying objects
CN115032590B (en) Method for positioning underwater acoustic beacons through single hydrophone based on time information
US4347739A (en) Measuring equipment for the determination of terrestrial refraction
Turner et al. The Raytheon acoustic doppler navigator
Wasil et al. Photogrammetric measurements of dynamic displacements: Measurements made from rapid-flash stereo photography were used to calculate wave form of the first several modes of vibration of a square plate free on all edges
JPS63286706A (en) Method for measuring water bottom depth
Reid et al. System Concept and Results of the Canadian Aerial Hydrography Pilot Project
Stansell Jr Accuracy of geophysical offshore navigation systems
Sydenham Linear and angular transducers for positional control in the decametre range. A survey of available techniques
JPH08201101A (en) Method and apparatus for positioning working boat or the like
Ćmielewski A concept of a method of remote determination of the air temperature along a sight line of surveying instruments

Legal Events

Date Code Title Description
NAV Patent application has lapsed

Ref document number: 8002077-9