MIL-PRF-23359H
3.3.1.1 Sensitivity. The detector shall detect the following targets
described in table I, one at a time, in a plane parallel to the underside of
the search head (see Appendix A, figure 1) and passing by the point(s) on the
search head where a maximum signal is received at the following distances
shown in table 1. Point(s) on the search head where a maximum signal is
received shall be provided by the contractor.
TABLE I.
Sensitivity targets.
TARGETS
DISTANCES
Aluminum hollow tube,
Grade Alloy 5052
4.45 cm length, 0.64 cm dia.,
0.177 mm + 0.05 mm thickness
13.5 cm
PMN - 6 striker pin
308 series (see figure 2)
7.5 cm
M-14 mild steel pin
5.0 cm
3.3.1.2
Detection capability.
3.3.1.2.1 Offset. The detector shall detect a simulated M-16 mine under
the conditions of table II and at a minimum search head offset (from the edge
of the search head to the center of the target) of not less than 15 cm.
3.3.1.2.2 No offset. The detector shall detect metallic objects as
specified in the sensitivity requirements, (see 3.3.1.1) in sand, loam,
magnetite soils at the contractor's recommended specified sweep (see table
II).
TABLE II.
Target types and placement.
SOIL SWEEP SPEED TARGETS
SAND
LOAM
MAGNETITE
50 cm/sec
50 cm/sec
50 cm/sec
Aluminum, hollow tube
15 cm
15 cm
2.5 cm
PMN-6 striker pin,
10 cm
10 cm
2.5 cm
308 series
M-14 mild steel pin
surface
surface
surface
M-16 simulated mine
4 cm
4 cm
4 cm
The properties of the sand, loam and magnetite soils containing moisture from
2 to 25 percent and measured at frequencies of 300 MHz through 600 MHz are as
follows:
Sand
Relative dielectric constant of 2.57
Loam
Relative dielectric constant of 3.79
Magnetic susceptibility of 15k X 10-6 cgs
Magnetite
3.3.1.2.3 Immersed operation. When the search head receiver coil is
submerged 1.5 meters below the air-water interface, the detector shall be able
to detect metallic objects such as the M-14 mild steel pin.
2
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