An observation which expands previous observations and aims at obtaining complementary data in particular with other telescopes/instruments.
Follow-up, from follow, from O.E. folgian, fylgan "to follow, pursue," from W.Gmc. *fulg- (cf. O.Fris. folgia, M.Du. volghen, Ger. folgen "to follow") + up, O.E. up, uppe (cf. Du. op, Ger. auf "up, upward"), from PIE base *upo "up from below;" cf. O.Pers./Av. upā; Skt. úpa; Gk. hypo; L. sub, → hypo-; → observation.
Nepâheš, → observation; peygir, from pey "after; step," related to pâ "foot, step, track," → foot, + gir present stem of gereftan "to take, seize" (Mid.Pers. griftan, Av./O.Pers. grab- "to take, seize," cf. Skt. grah-, grabh- "to seize, take," graha "seizing, holding, perceiving," M.L.G. grabben "to grab," from P.Gmc. *grab, E. grab "to take or grasp suddenly;" PIE base *ghrebh- "to seize").
nepâheš az zamin
Fr.: observation au sol
An astronomical observation carried out using a telescope on Earth, as opposed to that from an orbiting satellite.
Fr.: observation à haute résolution
An observation that provides a particularly narrow, peaked image of a point source. → point spread function.
Fr.: observation au méridien
The observation of a star when it crosses an observer's meridian.
Fr.: observation météorologique
Evaluation or measurement of one or more meteorological elements.
1) Act or instance of observing; → observe.
Verbal noun of → observe.
Pertaining to, or founded on observation, especially based on observation rather than theory.
Adj. of → observation.
Fr.: astrophysique observationnelle
That part of astrophysics that is mainly concerned with the collection of observational data, in comparison with theoretical astrophysics
Fr.: biais observationnel
An error in observation arising from systematically favoring brighter or weaker objects or some particular object morphologies; e.g. → Malmquist bias.
Fr.: cosmologie observationnelle
The application of observational data to the study of the Universe as a whole.
Fr.: effet observationnel
A feature appearing in an observation, which is not intrinsic to the object observed, but is due to the inappropriate method used (e.g. limited angular resolution).
Fr.: erreur observationnelle
The difference between a measured value of quantity and its true value.
Fr.: observation hors source
An observation when the telescope is pointed away from the source in order to measure the sky background contribution.
Fr.: observation sur la source
In comparison with → off-source observation, an observation which is concerned with the source itself.
Fr.: observation avec antenne uinique
A radio astronomical observation which uses only one antenna, in contrast to interferometric observations.