primary radar

primary radar

[′prī‚mer·ē ′rā‚där]
(engineering)
Radar in which the incident beam is reflected from the target to form the return signal. Also known as primary surveillance radar (PSR).

primary radar

A radar that depends exclusively on transmitted energy, reflected back from the target. A primary radar indicates the target position in range and azimuth. It also can be made to indicate height. The other information for identification, however, cannot be given by primary radar, as it does not incorporate transponder data. The ranges of primary radar are dependent on transmission power and characteristics of the reflecting object and PRF (pulse repetitive frequency).
References in periodicals archive ?
Transponders are comparatively more effective than primary radar and assist in safe and accurate flight operations.
It pointed out the Russian authorities had also made the unprecedented move of declassifying Russian military equipment and conducting a meticulous experiment in collaboration with Almaz-Antei, to providing primary radar data and documents showing that the missile that downed the Malaysian Boeing belonged to Ukraine.
"HENSOLDT's primary radar provides almost four times the volume coverage when compared to others, and that's something our customers want." Raytheon provides air traffic management solutions to over 60 percent of the world's airspace.
The primary radar data of what happened that night I don't believe that we actually saw.
Their analysis of the primary radar data suggests that it was impossible to launch a missile towards the Malaysian Boeing from the area east of the tragedy site, including from the community of Snezhnoye.
"Due to the magnetic interference it generates, the 150-meter dual smokestack will impair not only the aircraft instruments but the accuracy of the Instrument Landing System (ILS) and the Air Traffic Control (ATC) primary radar," they said.
'Due to the magnetic interference it generates, the 150m dual smokestack will impair not only the aircraft instruments but the accuracy of the Instrument Landing System (ILS) and the Air Traffic Control (ATC) primary radar,' petitioners added.
Indra will integrate new primary radar co-mounted with an Enhanced Mode S Secondary Surveillance Radar to support en route, approach and landing manoeuvres.
A primary radar illuminates the surroundings, like a beacon, and it receives a fraction of the released energy after being scattered by surrounding objects.
SSRs are distinct from an ATC primary radar which determines the position of an aircraft using conventional radar techniques which involve transmitting a radio pulse which bounces of an aircraft as an echo.
The two major methods used to track planes are primary radar and secondary radar.