ATP-3-09-02 Field Artillery Survey Download
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Chapter 8 8-2 ATP 3-09.02 16 February 2016 the IPADS. The Porro Prism Assembly (PPA) will be in the locked position during transit to avoid permanent damage. The Nikon NE-102 provides accuracy of 0.02mils and has a magnification of 30X. IMPROVED POSITION AND AZIMUTH DETERMINING SYSTEM-GLOBAL POSITIONING SYSTEM (IPADS-G) 8-5. The IPADS-G is currently being used in ground vehicles only for survey operations. The system can achieve 4 meters CEP in position and 2 meters Probable Error (PE) in altitude and 0.4 mils PE in azimuth. The IPADS-G is extremely accurate and meets or exceeds all prescribed requirements for FA Survey when using GPS aiding. 8-6. IPADS-G must be initialized before it can perform survey operations. It is flexible in initialization methods allowing seamless transitions between stationary (gyro-compassing method) and on-the-move (GPS-aided method). Three types of initializations are used; “moving base”, “normal” and “hot start”. 8-7. With GPS aiding, it is no longer necessary to wait 5 or 10 minutes for the IPADS-G to perform normal or hot start initialization. IPADS-G can start moving once countdown reaches 440 seconds if GPS aiding is selected, available and the internal GPS Receiver is initialized (position, Ephemeris, timing data). If IPADS-G is moved prior to counting down to 440 seconds, a fatal CPNU error will occur. When the operator starts driving the vehicle before the Hot Start or Normal Initialization is complete and GPS is available, 800 seconds (or less depending on how long normal initialization has been running while the vehicle was stationary). If the vehicle stops the navigation mode will switch from MOV. BASE to ALIGNING. 8-8. In the case where the IPADS (GPS Receiver) was not recently initialized at that location (e.g. after a long period of storage or after transporting over a long distance), and the GPS feature is enabled and available, a DAGR can be used to initialize the IPADS GPS Receiver within one minute. If a DAGR is not available the IPADS GPS Receiver will start downloading large amounts of data from the satellites (position, Ephemeris, timing data). This process will take 10 to 30 minutes. SYSTEM USES 8-9. The system’s main purpose is to provide a common grid for the FA weapons systems and target acquisition assets rapidly determining accurate position, azimuth, and altitude on the modern battlefield. The IPADS or IPADS-G also contains a navigational aide to decrease travel time between missions and can be used in conjunction with hasty survey techniques or GPS receivers. CONFIGURATIONS 8-10. IPADS or IPADS-G must be configured for the current mission including: normal operation mode or training, vehicle type, survey order, ellipsoid and datum, display settings, grid zone (if using UTM coordinates and operating within 40 km of a zone boundary) and date and time. Any vehicle used with IPADS must supply at least 100 amperes at 24 VDC for IPADS or IPADS-G operation. IPADS or IPADS- G retains configuration settings after shutdown. It is not necessary to reconfigure IPADS or IPADS-G for settings that do not change from the previous mission unless changing from a training mode to a tactical mode. See figure 8-1 (on page 8-3) for an example of an IPADS.