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)

4.4.3 Flight profile. The specific flight profile shall be as specified in the associated specification and in the test plan. The altitude shall be selected for ease in target acquisition and shall be compatible with the requirements of 4.4.2 and 4.4.4 of this standard.

4.4.4 Drop ranges. The ranges of the chaff from the measuring radars shall meet the aspect angle requirements of 4.4.2 and to ensure that a one square meter target shall be 10 dB above the minimum detectable signal level of the radar. The length of the drop zone shall provide for not less then 5-15 seconds of continuous chaff dispensing or provide for adequate spacing of discrete chaff units and ensure that 3-10 drops can be made on a single run.

4.4.5 Drop sequence. The drop sequence for discrete chaff units shall be chosen to ensure that no two consecutive chaff units may provide energy to one radar resolution cell during the

time of measurements. Normally there are three or more full radar resolution cell spaces provided between successive chaff drops. The same spacing requirements shall be met for the pulsed mode of continuous chaff dispensers. Only one drop sequence per run shall be used for continuous

chaff deployment.

4.5 Test documentation. Test documentation shall be prepared to record the results of each acceptance test. As a minimum, the test documentation shall contain:

a. Processed second level statistics of test data provided by the ground crew operator. b. Pre-flight and post-flight calibration data.

c. Test data taken during testing. (4.5.1)

d. Chaff dispensing plan.

4.5.1 Test data. Test data taken at time of test shall include the aircraft flight profile including calibrated air speed; details on drop zones, drop spacings and drop sequences; characteristics of the radar; weather conditions; method of positioning the sample gates; spacing between the sample gates; and all other pertinent information delineated in the associated specification and test plan.

4.5.2 Chaff dispensing plan. A chaff dispensing plan shall be included in the test documentation, and describe the type of aircraft used, the dispenser location on the aircraft, complete information on the type of chaff payload being tested, and complete pre-and post flight information on the chaff payload. Figure 2 provides an example plan format which is recommended for guidance. However, all applicable block information shall be provided in plan.