MTI radar

MTI radar (moving target indicator)

MTI radar (moving target indicator)click for a larger image
Radar scope presentation with and without MTI.
Radar in which the Doppler effect can be employed to differentiate between stationary and moving targets, with the former suppressed and only the latter displayed. In this process, the permanent echoes as well as those from very slow moving objects (if desired) are not displayed on the PPI (plan position indicator), and the radar controller can pay attention to the real aircraft.
References in periodicals archive ?
GEOINT Training now consists of an IMINT section working in an integrated and collaborative Analysis and Control Element (ACE) environment where students simultaneously exploit FMV and MTI radar returns, cross-cue multiple sensors such as Unmanned Aerial Systems (UAS) and the Joint Surveillance and Target Attack Radar System (J-STARS), and produce digital reports including Imagery Derived Products (IDP) and video clips within the DCGS-A concept design.
"Performing complex MTI radar missions from space poses many technology challenges.
The after-action comment provided by Staff Sergeant Adrian Flores from the 513th MI Brigade perhaps best reflected the significant impact that CGS crews made in Iraq-- "No other collection asset provided the wide-area all-weather coverage of the battlespace that the [Joint] STARS did with the [moving target indicator] MTI radar. The CGS allowed us to interact in real time with the collection platform and to focus on our critical requirements and process the collection data into usable and actionable intelligence products.
The first of four Horizon helicopters -- Eurocopter AS 532 Cougar helicopters fitted with MTI radar -- was declared operational on March 1, but as the program was launched in the '90s, many of the components of the system are considered obsolete.
Other topics include imaging radar, pulse-Doppler and MTI radar, and special radars such as weather radar and ground-penetrating radar.
Like the MTI radar, the SAR measures returned signal power at time increments equal to the pulse width to create a series of "range bins," which determine the radar return as a function of distance from the radar, as shown in Figure 2.
For example, an MTI radar with pulse repetition frequency of 6,250, which samples 200 times per pulse and digitizes the I&Q values at 12 bits each, generates 30 Mbits per second of raw data.
Since an MTI radar uses Doppler frequency shifts to separate small moving targets from fixed clutter, the phase coherency between the transmitted signal and the downconverted received signal is of extreme importance.
The use of this standard is expanded to include the RCS calibration of any moving vehicle that might be used in evaluating the capabilities of an airborne MTI radar system.
The IDR report also stated that the system was automatically triggered by the hostile (presumably radar altimeter or AWACS MTI radar) emissions and that it automatically shut down after each attack.
The MTI radar sensor is quoted as having a detection range of at least 100 km and four operating modes: "Acquisition" (target detection/localization), "Count" (high-resolution analysis of a particular sector), "Memory" (overlay facility for analysis of activity over time) and "Expansion" (digital display enlargement).