1、 1 MIL-PRF-52955D 7 April 2009 SUPERSEDING MIL-PRF-52955C 8 November 2002 PERFORMANCE SPECIFICATION IMPROVED POSITION AND AZIMUTH DETERMINING SYSTEM (IPADS) This specification is approved for use by all Departments and Agencies of the Department of Defense. 1 SCOPE 1.1 Scope. This specification cove
2、rs an improved position and azimuth determining system, which is an inertial surveying system that may be Global Positioning System (GPS) aided. 1.2 Requirements. Threshold (T) requirements are the minimum acceptable requirements. Objective (O) requirements indicate desired performance and must be m
3、et when specified in the solicitation (6.2). Unless specifically identified as (O), all requirements are (T). 2 APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents cited in other secti
4、ons of this specifica-tion or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements documents cited in section 3 and 4 of this specification, whether
5、 or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the soli
6、citation or contract. AMSC N/A FSC 6675 Comments, suggestions, or questions on this document should be addressed to Director, U.S. Army Topographic Engineering Center, ATTN: CEERD-TS-T, 7701 Telegraph Road, Alexandria, VA 22315-3864 or emailed to kenneth.travellerus.army.mil. Since contact informati
7、on can change, you may want to verify the currency of this address information using the ASSIST Online database at http:/assist.daps.dla.mil/. INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-52955D 2 SPECIFICATIONS FEDERAL A-A-5256
8、7 Survey Instrument Automated, Integrated (AISI) A-A-52573 Theodolites, Surveying, Direction: Third Order A-A-52574 Theodolites, Surveying, Direction: Second Order DEPARTMENT OF DEFENSE MIL-DTL-55116/2 Connector, Plug, Six Pin Audio, Crimp Sleeve Terminals, Wire Strain Relief, U-229 Type STANDARDS F
9、EDERAL FED-STD-595/34083 Colors Used In Government Procurement DEPARTMENT OF DEFENSE MIL-STD-130 Identification Marking of U.S. Military Property MIL-STD-461 Requirements for the Control of Electromagnetic Interference Characteristics of Subsystems And Equipment MIL-STD-464 Electromagnetic Environme
10、ntal Effects MIL-STD-810 Environmental Engineering Considerations and Laboratory Tests MIL-STD-1275 Characteristics of 28 Volt DC Electrical Systems in Military Vehicles MIL-STD-1472 Human Engineering MIL-STD-1474 Noise Limits HANDBOOKS DEPARTMENT OF DEFENSE MIL-HDBK-781 Reliability Test Methods, Pl
11、ans and Environments for Engineering, Development, Qualification and Production MIL-HDBK-783 Chemical and Biological (CB) Contamination Avoidance and Decontamination MIL-HDBK-784 Design to Minimize Contamination and to Facilitate Decontamination of Military Vehicles and Other Equipment: Interiors an
12、d Exteriors (Unless otherwise indicated, copies of the above specifications, standards and handbooks are available from the Standardization Document Order Desk, 700 Robbins Avenue, Bldg. 4D, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-529
13、55D 3 Philadelphia, PA 19111-5094. They also may be downloaded from http:/assist.daps.dla.mil/quicksearch/.) 2.2.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications, form a part of this document, to the extent specified herei
14、n. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. SAAL-RP 4 Jan 2000 MEMORANDUM, SUBJECT: Development, Acquisition and Fielding of Weapon and Information Systems with Batteries (This document may be accessed at: http:/lrc7.monmouth.army.mil
15、/QuickPlace/ipm/PageLibrary85256AE1004DB1FD.nsf/h_Toc/8A26328FBC6148FE85256BAB006763E7/?OpenDocument) Army Guide On Selection/Approval of Portable/Mobile Power Sources (This document may be obtained from Program Manager, Joint lightweight 155mm Howitzer, Building 151, Picatinny Arsenal, NJ 07806-500
16、0.) FGDC-STD-007.2 Geospatial Positioning Accuracy Standards Part 2: Standards for Geodetic Networks (This document may be downloaded from http:/www.fgdc.gov/standards/projects/FGDC-standards-projects/accuracy/part2/chapter2.) FSS-SS-0011-ICD Improved Position And Azimuth Determining System Interfac
17、e Control Document for the Forward Observer System (This document may be obtained from Program Manager, Joint lightweight 155mm Howitzer, Building 151, Picatinny Arsenal, NJ 07806-5000.) NGA/NASA EGM96, N=M=360 Earth Gravitational Model (EGM96 documentation and data files may be downloaded from http
18、:/earth-info.nga.mil/GandG/wgs84/gravitymod/egm96/egm96.html.) NIMA TR8350.2 Third Edition Amendment 1 Department of Defense World Geodetic System 1984, Its Definition and Relationships with Local Geodetic Systems (NIMA TR8350.2 may be downloaded from http:/164.214.2.59/GandG/tr8350_2.html) SEL Form
19、 1183 Feb 2001 System Safety Design Verification Checklist (SEL Form 1183 can be downloaded from http:/www.monmouth.army.mil/cecom/safety/system/spublication.htm.) 42 U.S.C. 4321-4370d National Environmental Policy Act Provided by IHSNot for ResaleNo reproduction or networking permitted without lice
20、nse from IHS-,-,-MIL-PRF-52955D 4 (This document can be downloaded from http:/epw.senate.gov/nepa69.pdf.) 29 C.F.R 1910.145 Specifications for Accident Prevention Signs and Tags (29 C.F.R 1910.145 can be viewed at http:/www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS accomplish data
21、 entry, readout, and update; observe system status; display survey and other operational parameters; and initiate data transfer to an external host system. 3.4.4.1 Control and display location. The control and display interface shall be visible and accessible for hands-free operation (except for dat
22、a entry and selection procedures) by both the vehicle driver and IPADS operator (not necessarily at the same time). 3.4.4.2 Display parameters. IPADS shall display: a. Survey control point identifier. b. Universal Transverse Mercator (UTM) easting, northing and grid zone. c. Latitude and longitude.
23、d. Military Grid Reference System (MGRS) (see Appendix B) (O). e. Altitude. f. Mark identifier. g. Azimuth. h. Distance. i. Angle. j. Ellipsoid display name. k. Semi-major axis, flattening or semi-minor axis indicator, and semi-minor axis or inverse flattening of user defined ellipsoids. l. Datum di
24、splay name. m. X, Y, Z-shifts for user defined datums. n. Current date and time of day. o. Date and time of day a SCP or Mark was established. p. Unadjusted or adjusted survey indicator for stored SCP data. q. IPADS and GPS receiver software version(s). r. GPS warning messages. s. Estimated Horizont
25、al Error (EHE) and Estimated Vertical Error (EVE). t. Number of healthy, visible, GPS satellites. u. Number of healthy GPS satellites being tracked, displayed by code type. v. Number of GPS satellites used in the solution, displayed by code type. w. GPS cryptographic key type and number of days keys
26、 are valid. x. GPS almanac age. y. Overall indication of received signal carrier-to-noise ratio (C/N0), low or Ok. z. All other parameters required to operate IPADS. 3.4.4.2.1 Display field characteristics. Characteristics of display fields shall be as specified in Appendix A. Provided by IHSNot for
27、 ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-52955D 14 3.4.4.2.2 Survey data page. Survey control point identifier, horizontal position, altitude, mark identifier, azimuth, distance from last initialization or update point (if displaying survey in progress), le
28、ngth of OL (if displaying saved survey data), ellipsoid name, and datum name shall be displayed on a single page. 3.4.4.2.3 Display field selection. At any time, IPADS shall allow the operator to select display of: a. Geodetic (T), UTM (T), or MGRS (O) horizontal coordinates. b. UTM coordinates with
29、 respect to the normal or adjacent zone, when horizontal position is within 40 Km of a UTM zone boundary. c. Grid or geodetic (true) azimuth. d. Azimuth in mils; degrees, minutes and seconds; or decimal degrees. e. User ellipsoid inverse flattening or semi-minor axis. f. Geodetic coordinates in deci
30、mal degrees or degrees, minutes, and seconds. 3.4.4.2.4 Horizontal position display. Horizontal position shall be displayed with respect to the selected horizontal datum. 3.4.4.2.5 UTM zone. a. UTM coordinates shall be displayed with respect to standard, 6 wide longitude zones throughout the UTM cov
31、erage area. b. Within 40 Km of a UTM zone boundary, IPADS shall accept initialization or update UTM coordinates with respect to the normal UTM zone, for that location, or the adjacent (extended) UTM zone. IPADS shall display UTM coordinates with respect to the input zone until the operator changes t
32、he zone (3.4.4.2.3.b.) or a normal or extended zone boundary is crossed. c. The first time a normal UTM zone boundary is crossed from west to east during a mission, IPADS shall prompt the operator to select whether display of UTM coordinates shall remain with respect to the previous zone or shall be
33、 with respect to the new zone. For subsequent crossings of the same zone boundary, IPADS shall display UTM coordinates with respect to the previously selected zone for the current side of the boundary. d. The first time IPADS crosses into an extended zone from east to west during a mission, IPADS sh
34、all prompt the operator to select whether display of UTM coordinates shall remain with respect to the current (normal) zone or shall be with respect to the adjacent (extended) zone. For subsequent crossings of the same extended zone boundary, IPADS shall display UTM coordinates with respect to the p
35、reviously selected zone for the current side of the boundary. e. When further than 40 Km from a UTM zone boundary, IPADS shall display UTM coordinates with respect to the normal UTM zone for that location. 3.4.4.2.6 Vertical datum. Altitude shall be displayed with respect to the local vertical (msl)
36、 datum when no GPS aiding or relative GPS aiding is used. Altitude shall be displayed with respect to the WGS 84 geoid when GPS-centric aiding is used. Altitude shall not be transformed between datums. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
37、MIL-PRF-52955D 15 3.4.4.3 Operator control functions and data entry. IPADS shall allow the operator to: a. Turn IPADS on and off. b. Read out survey data from the previous mission, if not previously cleared by the operator. c. Perform “hot start” initialization (3.3.5.2.) d. Initialize and update IP
38、ADS position using GPS data, if available. e. Select high or lower order operating mode. f. Enter and exit transport mode. g. Select and use survey control point data provided by the host system for position initialization and update. h. Select the vehicle reference or offset reference for position
39、and azimuth transfer. i. Establish the relative location of the vehicle reference for different host vehicles. j. Enter distance for offset position and azimuth transfer. k. Enter angle for offset azimuth transfer. l. Enter date and time. m. Initialize date and time to GPS UTC time, within two secon
40、ds, when GPS time is available and an FSS-SS-0011-ICD Time Message has not been received from the host system. n. Enter survey control point identifiers. If the operator does not enter a survey control point identifier, IPADS shall populate the field with an unambiguous identifier. o. At any time, s
41、elect ellipsoid and horizontal datum from preprogrammed table of all datums listed in NIMA TR8350.2 without requiring reinitialization or a position update. p. At any time, select ellipsoid from preprogrammed table of all ellipsoids listed in NIMA TR8350.2 and enter shift parameters for two user-def
42、ined horizontal datums without requiring reinitialization or a position update. q. At any time, enter ellipsoid and shift parameters for two user-defined horizontal datums without requiring reinitialization or a position update. r. At any time, initialize and update horizontal position coordinates a
43、nd altitude. s. Enter mark identifiers. If the operator does not enter a mark identifier, IPADS shall populate the field with an unambiguous identifier. t. Establish the position of a survey control point, except when accuracy for the selected survey order can not be maintained. u. Associate up to f
44、our azimuth marks with a survey control point v. Establish the azimuth of an orienting line, except when accuracy for the selected survey order can not be maintained. w. Save survey control point data. x. Display current IPADS position and heading. y. Display current GPS position, if available, with
45、 EHE, and EVE. GPS position shall be with respect to the drivers position transfer interface (3.4.5.a.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-52955D 16 z. Display data for any saved survey control point. aa. Delete data for any save
46、d survey control point. bb. Delete data for all saved survey control points. cc. When GPS aiding wasnt used, adjust all survey control points on a survey traverse leg for closure. dd. Send data for any saved survey control point to the host system. ee. Send data for all saved survey control points t
47、o the host system. ff. Adjust control and display lighting intensity. gg. Turn the audible alarm on and off. hh. Select GPS aiding mode from: No GPS Aiding, GPS Centric Aiding, and GPS Relative Aiding. GPS Centric Aiding shall be the power on default. ii. Select use of All Y-code or Mixed Y and P-co
48、de GPS signals. All Y-code shall be the power-on default. jj. Zeroize GPS cryptovariables. kk. Zeroize GPS cryptovariables and all classified GPS data (typically called “Emergency Zeroization). 3.4.4.4 Status indications. IPADS shall indicate to the operator: a. Operational status (BIT) of all LRUs.
49、 b. Status of vehicle power and backup power. c. Operational status (connected/disconnected) of serial data link with host system. d. Requirements to stop the vehicle or remain stationary, both audibly and visually. e. Travel time until a stop is required. f. Time remaining to complete alignment. g. When a UTM zone boundary or extended zone boundary has been crossed, both audibly and visually. h. Whe
