Army aircraft operating at altitudes below 25,000 ft are at riskwhen liquid water is present in the atmosphere within a criticaltemperature range. Currently, existing ice detection and accretionmeasurement systems have particular features that limit their applicationfor Army aircraft utilization. A multi-mode, MMW radar sensor is proposedthat has unique features that make it useful for both fixed and rotary wingaircraft. Each radar mode works in a complementary function to effect thecomplete range of ice accretion. An important feature is one that willallow it to operate in a non-radiation mode during periods of restrictedemissions. A study to expand the proposed concept followed by selectiveexperiments to validate the detection and measurement modes will beperformed.
