Review support

Maintenance during the review (also tracking during the review, tracking during the scan , Track Track Scan, TWS ) is a multi-function radar station mode in which part of the resources (time, radiated power) is allocated to the space overview, and the rest to continuous tracking of coordinates and parameters of one or several selected targets. The equipment allows you to enter the targets detected during scanning into the tracking list. Radars of this type, along with the display of the general situation in the airspace, provide the operator with additional information about the most dangerous or other objects of interest ^[1] .

In one form or another, TWS radars have a memory that allows you to remember the coordinates of one or more tracking targets during the previous scan cycle and compare them with the coordinates of targets found in the next cycle ^[2] .

Historically, the first TWS radars were fire control radars, which, along with a general overview of the targets, accompanied one target for which the fire was currently fired. One of the first such radars was the Mk 8 American marine radar, designed to control surface targets. In addition to the actual tracking of the target, it allowed observing bursts at the places where shells ruptured in order to correct shooting ^[2] .

Modern TWS radars are capable of simultaneously tracking several targets, which, in the presence of one beam, greatly reduces the radius of the radar. An example is the American AN / SPQ-9 firing control radar with an antenna rotation speed of 60 rpm. Electron-scan multi-beam radars (such as AN / SPY-1 ) emit a separate beam to accompany each target (physically or in time-sharing mode), which allows you to bypass the range limits ^[2] .