MIL-STD-2071A(AS)
standard. The test facilities, instrumentation, aircraft, and dispenser installations specified shall be limited to those which have yielded comparative data for at least three previous tests of the same chaff type, and have thereby established a data base for performance requirements. In addition, when a new facility or equipment is initiated, the data from the new facility or equipment shall be comparable to the existing baseline data. For individual chaff units, the three tests shall consist of a minimum of 30 units dispensed on each of the three test days; for continuous chaff, the three tests shall consist of a minimum of one roll, roll set, or roving chaff dispensed on each of three
test days.
4.3.1 Number and types of radars. The types of radars used for preproduction, initial production, and production lot tests shall be as specified herein. The radar units shall have established data based general performance requirements as specified in 4.3. All measurements shall be accomplished while tracking aircraft at aspect angles of 5 degrees to 20 degrees. As a minimum, all chaff shall be evaluated using a 2-18 GHz SFR and 35 GHz radar. The data acquisition radars shall be slaved from a separate tracking radar if one of the data radars is not capable of tracking. Parallax correction between the data and tracking radar shall be employed (see figure 1). The data acquisition radars shall meet the following requirements.
a. The radars shall be equipped and specific parameters set in accordance with the associated specification and 4.3.1.1.
b. SFR specifications:
Parameter Frequency |
E/F Band 2-4 GHz |
G/H Band 4-8 GHz |
I Band 8-12.4 GHz |
J Band 12.4-18 GHz |
Min. Freq Coverage |
2.05 to 3.75 GHZ |
4.20 to 7.20 GHz |
8.20 to 12.30 GHz |
13.0 to 17.6 GHz |
Req. Steps (GHz)(min) |
0.10 to 0.15 |
0.2 to 0.4 |
0.2 to 0.5 |
0.6 to 1.0 |
Min. Freq Qty |
13 |
11 |
9 |
7 |
PRF 150 pulses per frequency per second
Pulsewidth 0.5 s BandWidth 10.0 MHz Polarization horizontal
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