Radar systems' performance checks shall be made how often?

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Radar systems must be checked at regular intervals to ensure they stay within specification and continue providing accurate information. While these checks should happen often enough to catch drift from temperature changes, component aging, or wear, they shouldn’t disrupt operations with excessive downtime. Daily checks would be overly frequent for routine performance verification and are usually reserved for safety-critical pre-operation checks. Weekly checks are also more frequent than needed for typical drift rates. Annual checks would allow too much drift to accumulate before verification. Monthly performance checks provide a practical balance, allowing a thorough test of essential parameters—such as range and bearing accuracy, transmitter power, receiver sensitivity, and display integrity—and any necessary calibration within a reasonable maintenance window. That’s why monthly is the best fit.