SUR-RAD Demonstration Quiz - Intersoft Electronics

Why is the periodic testing of radar antennas with special tools important for the overall radar performance? The antenna is the most high-value component of the radar The antenna is the only moving part of the radar The antenna performance cannot be effectively checked by the radar's built-in diagnostics (BITE) The antenna is exposed to the elements of the weather

When should the performance of radar antennas be checked? At the radar acceptance tests Whenever a lightning strike occurs on the antenna or radome Whenever an accident or near miss occurs in the surveillance area Periodically, every 12-18 months or when system performance degradation is detected by the data analysis tools

The solar measurement is an accurate method to measure: The antenna vertical sidelobes The elevation pointing angle of each beam and the vertical beam overlap The azimuth position of interrogation punch-throughs The effects of solar radiation on radar performance

In case the antenna uplink measurement in the Far-Field shows high azimuth sidelobes, what is the primary assessment? There is a problem with the antenna elements that must be investigated further using Near Field Measurements Repeat the uplink measurement from a different location (azimuth) to verify if it is indeed an antenna defect or a reflection from the environment The measurement position is too close, and we must repeat the uplink measurement from a longer distance The measurement position is too far, and we must repeat the uplink measurement from a closer distance

What is the main advantage of the antenna Near Field Measurement of an MSSR LVA-type antenna? It can provide both the Horizontal and Vertical Polar Diagrams of the antenna, as well as identify possible defective antenna elements (LVA columns) It is fast and requires little effort compared to the Far-Field (Uplink) method It does not require stopping the rotation of the antenna Both (B) and (C) are correct

A common reason for the degradation of PSR and SSR antenna radiation patterns is: Degradation of the radar receiver sensitivity Instability of the radar transmitter power Degradation of the radome's surface material Incorrect settings of the signal processor

If during the Uplink Measurement of an MSSR antenna Horizontal Pattern, there is a second MSSR visible in the recording, how can we separate the recordings of the radar under test? Using the specific stagger pattern of the radar under test Using a bandpass filter for the frequency of the radar under test Using the pulse modulation characteristics of the radar under test It is not possible to separate the recordings because they are at the same frequency of 1030 MHz

Why is it important that at the uplink HPD measurement, the MSSR SLS pattern has higher power than the MSSR SUM pattern at all azimuths except the mainlobe? To ensure that the transponder replies have adequate Signal-to-Noise Ratio (SNR) and are decoded correctly by the interrogator To ensure that only the transponders that are interrogated by the MSSR mainlobe are replying to the interrogator To ensure that the interrogator transmits the required power for triggering the transponder's replies To force the transponder's replies via Mode-S instead of Mode A/C

In which case is the use of a drone preferred for the Uplink Measurement of the antenna patterns of a PSR or SSR? When the weather conditions (rain, wind, etc.) are bad When there are multiple reflective objects on the ground close to the radar antenna under test When there is no suitable land position close to the radar mainlobe elevation Both B and C are correct

In which case is the drone measurement NOT preferred for the Uplink Measurement of the antenna patterns of a PSR or SSR? When the weather conditions (rain, wind, etc.) are bad When the regulations do not allow or are very restrictive on drone flights in the area around the radar under test When we want to measure both the horizontal and vertical patterns of the radar under test When the measurements take place at night

Radar Demonstration – Knowledge Quiz