radar horizon
81over-the-horizon radar — A radar system that makes use of the atmospheric reflection and refraction phenomena to extend its range of detection beyond the line of sight. Targets can be detected by over the horizon radar thousands of miles away. Over the horizon radars may …
82Early warning radar — An early warning radar is any radar system used primarily for the long range detection of its targets, i.e., allowing defences to be alerted as early as possible before the intruder reaches its target, giving the defences the maximum time in… …
83over-the-horizon radar — transhorizontinio aptikimo radaras statusas T sritis radioelektronika atitikmenys: angl. over the horizon radar; trans horizon radar vok. Transhorizontradar, n rus. загоризонтная радиолокационная станция, f pranc. radar transhorizon, m …
84trans-horizon radar — transhorizontinio aptikimo radaras statusas T sritis radioelektronika atitikmenys: angl. over the horizon radar; trans horizon radar vok. Transhorizontradar, n rus. загоризонтная радиолокационная станция, f pranc. radar transhorizon, m …
85Deepwater Horizon oil spill — 2010 oil spill and BP oil spill redirect here. For other oil spills in 2010, see 2010 oil spill (disambiguation). For the 2006 oil spill involving BP, see Prudhoe Bay oil spill. For the drilling rig and explosion, see Deepwater Horizon… …
86Weather radar — in Norman, Oklahoma with rainshaft …
87Passive radar — systems (also referred to as passive coherent location and passive covert radar) encompass a class of radar systems that detect and track objects by processing reflections from non cooperative sources of illumination in the environment, such as… …
88Equation du radar — Équation du radar Énergie retournée L équation du radar est un bilan des puissances sur le trajet aller retour d une onde émise par un radar. Celle ci dépend des caractéristiques du radar (antenne, circuits électroniques, guide d onde, pertes de… …
89Équation du radar — L’énergie retournée dépend de la puissance transmise, du gain de l antenne, de la longueur d onde utilisée, de la distance radar cible et de la surface équivalente radar de la cible (σ) L équation du radar est un bilan des puissances sur le… …
90Synthetic 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 …
