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subtense
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subtense
subtense, n. Geom. (səbˈtɛns) [ad. mod.L. subtensa (sc. linea line), fem. pa. pple. of subtendĕre to subtend. Cf. Sp., Pg. subtensa.] a. A subtending line; esp. the chord of an arc. Also, the angle subtended by a line at a point.1614 Handson tr. Pitiscus' Trigonom. 31 A subtense is a right line, ins...
Oxford English Dictionary
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Subtense Valley
Subtense Valley () is a mostly ice-free valley, 1.5 nautical miles (2.8 km) long, located 2 nautical miles (3.7 km) northwest of Tabular Mountain in the A subtense bar is a fixed base (usually 2 meters long) used in conjunction with a theodolite in the calculation of horizontal distance.
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subtention
† subˈtention Obs. [f. L. subtent-, pa. ppl. stem of subtendĕre to subtend: see -tion.] = subtense n.1610 Hopton Baculum Geodæt. vii. ii. 297 Any right lines being applied to a circle is called a subtention, which may be Sines, Tangents, or Secants.
Oxford English Dictionary
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Rangefinder
Two mirrors set a distance apart horizontally in a long slim box, similar to a subtense bar but located at the measuring station, and forming two images
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quintuple
▪ I. quintuple, a. and n. (ˈkwɪntjuːp(ə)l) [a. F. quintuple (1484), f. L. quint-us fifth, after quadruple.] A. adj. a. Fivefold; multiplied by five; consisting of five things or parts. quintuple power, quintuple proportion, quintuple ratio, the ratio of five to one. quintuple time in Mus. (see quot....
Oxford English Dictionary
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Quartermain Mountains
Other features
Nadir Bluff
Plumb Bob Point
Subtense Valley
References
Mountain ranges of Victoria Land
McMurdo Dry Valleys
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elliptical
elliptical, a. (ɛˈlɪptɪkəl) [f. prec. + -al1.] 1. That has the form of an ellipse; pertaining to ellipses.1656 Hobbes Six Less. Wks. 1845 VII. 305 The cone described by the subtense of the..elliptical line. 1755 B. Martin Mag. Arts & Sc. i. v. 23 They all move in Orbits, which are more or less oval,...
Oxford English Dictionary
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Government Engineering College, Trivandrum
theodolites, electronic theodolite, dumpy levels, engineering chains, measuring tapes, plane table, prismatic compass, total station, planimeter, and subtense
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cycloidal
cycloidal, a. (saɪˈklɔɪdəl, sɪk-) [f. as prec. + -al1.] 1. Geom., etc. Of, pertaining to, or of the form of a cycloid. cycloidal engine: an instrument used in engraving an ‘engine-turned design’ upon the plates for bank-notes, etc., as a precaution against counterfeiting; the graver-point having a m...
Oxford English Dictionary
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Tacheometry
Subtense bars
Another device used in tacheometry is the subtense bar. The distance from the telescope to the subtense bar is the height of an isosceles triangle formed with the theodolite at the upper vertex and the subtense
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rectangular
rectangular, a. (rɛkˈtæŋgjʊlə(r)) [ad. L. type *rectangulār-is: see rectangle n. and -ar. Cf. F. rectangulaire (1571).] 1. a. Shaped like a rectangle; having four sides and four right angles.1624 Wotton Archit. 19 To resolue vpon Rectangular Squares, as a mean betweene too few, and too many Angles. ...
Oxford English Dictionary
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Color coding in data visualization
Calculated color difference assumes a 2-degree visual subtense. color difference as estimated for smaller subtense.
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double image
double image [f. double a. + image n.] 1. An optical appearance or counterpart of an object seen double in certain circumstances, esp. as a result of an affection of the eyes like diplopia.1880 W. James Coll. Ess. & Rev. (1920) 172 The other eye..is kept covered during the experiments to prevent dou...
Oxford English Dictionary
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Minimum resolvable temperature difference
Here the relevant spatial frequency is f = 1/W where W is the angular subtense of the target.
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Image resolution
lines per mm, lines per inch), to the overall size of a picture (lines per picture height, also known simply as lines, TV lines, or TVL), or to angular subtense
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