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.