radio-echo observation
21radar — /ray dahr/, n. 1. Electronics. a device for determining the presence and location of an object by measuring the time for the echo of a radio wave to return from it and the direction from which it returns. 2. a means or sense of awareness or… …
22performing arts — arts or skills that require public performance, as acting, singing, or dancing. [1945 50] * * * ▪ 2009 Introduction Music Classical. The last vestiges of the Cold War seemed to thaw for a moment on Feb. 26, 2008, when the unfamiliar strains …
23literature — /lit euhr euh cheuhr, choor , li treuh /, n. 1. writings in which expression and form, in connection with ideas of permanent and universal interest, are characteristic or essential features, as poetry, novels, history, biography, and essays. 2.… …
24Applications Des Satellites — Cet article décrit les diverses applications des satellites. Sommaire 1 Qu est ce qu un satellite artificiel ? 2 Les différents types de satellites artificiels 2.1 Satellite scientifique …
25Applications des satellites — Cet article décrit les diverses applications des satellites. Sommaire 1 Qu est ce qu un satellite artificiel ? 2 Les différents types de satellites artificiels 2.1 Satellite scientifique …
26Satellite militaire — Applications des satellites Cet article décrit les diverses applications des satellites. Sommaire 1 Qu est ce qu un satellite artificiel ? 2 Les différents types de satellites artificiels 2.1 Satellite scientifique …
27Satellites militaires — Applications des satellites Cet article décrit les diverses applications des satellites. Sommaire 1 Qu est ce qu un satellite artificiel ? 2 Les différents types de satellites artificiels 2.1 Satellite scientifique …
28Convective storm detection — is the meteorological observation of deep, moist convection (DMC) and consists of detection, monitoring, and short term prediction. This term includes the minority of storms which do not produce lightning and thunder. Convective storms can… …
29Nuclear magnetic resonance — This article is about the physical phenomenon. For its use as a method in spectroscopy, see Nuclear magnetic resonance spectroscopy. NMR redirects here. For other uses, see NMR (disambiguation). First 1 GHz NMR Spectrometer (1000 MHz,… …
30Synthetic aperture radar — (SAR) is a form of radar in which the highly directional (and thus very large) rotating antenna used by conventional radar is replaced with many low directivity small stationary antenna positions scattered over some area near or around the target …
