MIL-PRF-52955D
was used throughout the leg. IPADS shall not adjust the data for a survey traverse leg when GPS
aiding was used during any portion of the leg.
3.3.6.5 Transport mode. IPADS shall have a transport mode which can be activated after
IPADS has been initialized. While in transport mode, IPADS shall:
a. Not request ZUPT stops.
b. Maintain the selected GPS aiding mode.
c. Inhibit survey marking if accuracy for the selected survey order can not be maintained.
d. Inhibit survey marking if GPS aiding using data derived from C/A code signals is used.
e. Allow the operator to exit transport mode.
f. Require a position update before enabling survey marking if required to restore accuracy
of the selected survey order.
g. Require a position update before enabling survey marking if GPS aiding using data
derived from C/A code signals was used.
h. Enable survey marking when accuracy of the selected survey order is available.
3.3.7 Accuracy. The allowable errors specified below include errors associated with transfer
of horizontal position, altitude, and azimuth to and from IPADS and apply to both unadjusted
and adjusted traverse operations. For no GPS aiding or GPS relative aiding, accuracy is relative
to the SCP used to initialize or update IPADS at the start of the survey traverse leg. For GPS-
centric aiding, accuracy is relative to the World Geodetic System 1984 (WGS 84).
3.3.7.1 Horizontal position. Horizontal position circular error probable (CEP) shall not
exceed the values specified in Table I . 99 percent or more of individual horizontal position
radial errors shall be within the ranges specified in Table I .
3.3.7.2 Altitude. Altitude probable error (PE) shall not exceed the values specified in
Table I. 99 percent or more of individual altitude errors shall be within the ranges specified in
Table I.
3.3.7.2.1 Height-Above-Ellipsoid (HAE)/Mean-Sea-Level (MSL) conversion. The error
introduced by converting between HAE and MSL shall not exceed the error inherent in geoid
undulations calculated by bi-linear interpolation of the NGA/NASA EGM96 (Earth Gravity
Model 1996) 30' x 30' geoid undulation table.
3.3.7.3 Azimuth. Azimuth PE shall not exceed the values specified in Table I . 99 percent
or more of individual azimuth errors shall be within the ranges specified in Table I . Azimuth
accuracy requirements apply to orienting lines (OLs) 100 meters in length and longer established
using a survey instrument (3.4.5,d). Azimuth accuracy requirements apply to OLs within in the
range 100 through 400 meters in length established using the two-position method (3.4.5.b).
3.3.8 Operating time. IPADS shall perform as specified herein for 24 continuous hours
including initialization time. This requirement does not preclude the operator from extending
operating time indefinitely.
3.3.9 Zero-velocity stops. The average required stationary time for a zero-velocity stop
shall not exceed 30 seconds. The maximum required stationary time for a zero-velocity stop shall
not exceed 60 seconds.
8
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business