MIL-STD-2071 Testing Of Chaff Radar Cross-SectionThis standard establishes the procedures, requirements, and instructions for testing chaff payloads under flight conditions to determine compliance with the associated system performance or detail specification specified in the contract.

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MIL-STD-2071A(AS)

APPENDIX

4.2.7  Radar operation.  The radars shall track the aircraft in the beacon mode or be slaved in both range and angle to a radar that is tracking in the beacon mode.  In cases where beacon tracking cannot be done, range tracking shall be accomplished in the aided manual mode.  The radar shall lock-on and track the aircraft on each run prior to the deployment of chaff.  After the data system is initialized, chaff drops shall begin and the radar shall continue to track the aircraft

in both angle and range.  Except for measuring old chaff (chaff which has been deployed for more than a minute), data shall be taken only when the radar is locked on and tracking the deploying aircraft.  The operation of the radar(s) shall be continuously monitored during the test to ensure that the radar is stable and within radar specification limits.

4.2.8  Other data.  In addition to the RCS data, the azimuth and elevation angles from the radars and the time of day shall be recorded.  Other data, such as the type of aircraft, type of chaff, type of radar, altitude, and calibrated airspeed shall be recorded at the beginning of each test mission and at such times as there is a change in any of these parameters.  This data shall be recorded for permanent record.

4.3.  Instrumentation.

4.3.1  Requirements for RCS instrumentation.  The following requirements are provided for the RCS measurement instrumentation.  These requirements shall be used to establish that the RCS instrumentation meets required specification limits to measure the performance of the chaff measurement techniques described herein.

a.  Instantaneous Dynamic Range:  60 dB required, 80 dB desirable.

b.  Operating Range:  0.3 to 65 nautical miles required, ranges out to 125 nautical miles desirable.

c.  RCS accuracy:    1 dB.

d.  Measurement (range) gates:  15 minimum. e.  Permanent Record:  Disk.

f.  Data output:  Eight range gates in real time on chart recorders or other medium, with

15 range gates minimum in permanent records.

g.  Data recorded:  RCS in each range gate for each radar pulse.  Range, time, azimuth, and elevation information at least four times per second.

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