单词 | topocentric |
释义 | > as lemmastopocentric topocentric adj. Brit. /ˌtɒpə(ʊ)ˈsɛntrɪk/ , U.S. /ˌtɑpəˈsɛntrɪk/ Astronautics (of a parameter of a spacecraft or an orbit) measured relative to a point on the earth's surface (rather than its centre).ΘΚΠ society > travel > air or space travel > space flight > [adjective] > (put) in orbit > measured relative to earth's surface topocentric1965 1965 P. R. Escobal Methods Orbit Determination vii. 241 The topocentric right ascension-declination of the unknown orbit at the three times..can be obtained as follows. 1976 Sci. Amer. June 70/2 Since the tracking stations are on the earth's surface, the direct measurements they provide of the spacecraft's radial parameters (range, velocity and acceleration) are topocentric rather than geocentric. < as lemmas |
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