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|  MIL-D-70789A (AR)
The DRU shall be used
4.8.6.2.2.2 Functional survey test.
in Configuration A, Figure 1, for the functional survey test.
The test conditions and procedures to be used are as follows:
Test conditions.
a.
(1)
The DRU system will be operated in a ground
vehicle over a government approved test course.
(2)
One functional survey test will be run in an
eight hour period.
The DRU system shall stop no more than once
(3)
every hour for a planned zero-velocity update.
The distance traveled per run shall be
(4)
approximately 63 miles (100 km).
The test course shall have 11 known survey
(5)
points, including starting point, approximately 6.3 miles (10 km)
apart.
b. Test Procedure. The functional
survey
test
will
follow the procedure as outlined below:
(1)
Install system in vehicle.
Warm up, initialize, and align system at
(2)
starting point (15 min.).
Take test data at each survey point.
(3)
(4)
Turn off system and remove from vehicle.
The test data must meet accuracies as specified in 3.6.
4.8.6.2.2.2.1 Statistical Performance criteria. The
following sets of data shall meet the statistical criteria
established for survey parameters (3.6.1.1.1 through 3.6.1.1.11):
All
accumulated
data.
(Initialization
point
a.
excluded)
b. At least 98 percent of the individual missions
containing 10 or more survey control points. All data obtained
in an individual mission shall be used to compute that mission's
statistics. (Initialization point excluded)
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