ATP-3-09-02 Field Artillery Survey Download

Chapter 9 9-4 ATP 3-09.02 16 February 2016 Table 9-1. Example AN/PSN-11 setup PROMPT EXPLANATION SETUP MODE: AVG The averaging mode is used for static positions. This is the required mode setting for critical positions and IPADS or IPADS-G operations. Averaging produces more stable and accurate coordinates and height. The receiver tracks satellites, updates position data every second, and continuously averages each data set to the previous average. SV-TYPE: All-Y The selection for the satellite vehicle (SV) type causes the system to use only the encrypted “Y” code satellite signal, which provides the most protection against jamming and spoofing. SETUP UNITS: UTM/UPS Metric Artillery surveyors normally use UTM coordinates for IPADS or IPADS-G and conventional survey operations. The metric selection will cause the PLGR to calculate speed in kilometers per hour and to calculate distance in meters. ANGL: Mil Grid Artillery azimuth is normally expressed in mils and referenced to grid north. SET UP MVAR TYPE: Calc This selection is only used when calculating a magnetic azimuth with the PLGR. This function is not required with IPADS, IPADS-G, or conventional survey operations. Any type of calculated azimuth determined from a PLGR cannot be used for survey purposes. SET UP ELHold: Automatic Elevation hold (ELHold) et to automatic will cause the PLGR to automatically show the elevation as ELHold whenever fewer than four satellites are being observed or the satellite geometry is causing excessive elevation error. Regardless of the figure of merit (FOM) noted on the position screen, do not use elevation values when ELhold is being observed. Only use elevation values associated with an EL on the position screen. TIME: Zulu Zulu time will allow for global operations regardless of any local time offset. ERR: FOM Figure of merit is a system estimate of position accuracy. FOM 1 or 2 can be used for PAS initialization. Only a FOM 1 can be used for a IPADS or IPADS- G update point or other critical locations. SET UP DTM: NAS- C This is where the datum selection is made. It is extremely important that the datum selected be the same as the directed operational datum. AUTOMATIC OFF TIMER: Off This setting can cause the system to automatically shut down after a selected time. SETUP I/O SERIAL: Standard Used primarily during a PLGR download operation. During system-to-system download, both receivers should be set to standard. HAVEQUICK: & 1PPS: Off Used primarily for timing and radio synchronization. Normally set to off. SET UP AUTOMARK MODE: Off Can cause the system to automatically activate and mark locations on a timed basis. For normal survey operations, set to off. Legend: AVG – average DTM – datum EL – elevation FOM – figure of merit I/O – input/output IPADS – Improved Position and Azimuth Determining System IPADS-G – Improved Position and Azimuth Determining System-Global Positioning System NAS-C – North American 1927 Datum PLGR - Precise Lightweight Global Positioning System Receiver PPS – precise position system SV – satellite vehicle UTM/UPS – Universal Transverse Mercator/Universal Polar Stereographic  Position. Whenever coordinates are being determined for a critical position such as an orienting station, howitzer location, and IPADS or IPADS-G initialization or update point, use extreme care. To meet required accuracy, the system must have crypto keys loaded, be set on the correct