ATP-3-09-02 Field Artillery Survey Download
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Chapter 3 3-6 ATP 3-09.02 16 February 2016 Figure 3-2. Typical MLRS firing platoon position area 3-26. SCPs are used to initialize, update, and calibrate the SRP/PDS aboard the launcher. These SCPs are established with the IPADS or IPADS-G by using 10-minute zero velocity updates (ZUPT) corrections. Directional control is not required for the MLRS and HIMARS. At least one SCP must be available in each of the three firing platoon positions. 3-27. Although cover and concealment are considerations in platoon area survey point selection, utility should be the primary consideration. The platoon area survey point must be readily accessible so that the driver can stop the launcher next to the SCP without a ground guide or excessive maneuvering. 3-28. In the motor park area, each launcher should have an individual SCP for initialization. This option will enable the launcher to leave the motor park area in a HOT status and be able to accept fire missions immediately. 3-29. The launcher crew calibrates the SRP/PDS whenever the launcher carrier track system is replaced or repaired. Calibration must also be performed when there is a significant change in the terrain of the operating area. Three SCPs located 4 to 6 kilometers apart are required for conducting calibration. The launcher must be calibrated every 30 days, after position determining system (PDS) maintenance, and after major suspension or track drive maintenance. ALTERNATIVE SURVEY CONTROL 3-30. If the IPADS or IPADS-G becomes inoperative, the battery commander must ensure that the survey mission is continued. In this situation, survey control should be obtained from other FA units operating in the area or may be established by using hasty survey techniques. The IPADS or IPADS-G team can continue the mission using the AN/PSN-11 (precise lightweight global positioning system receiver [PLGR] or AN/PSN-13 DAGR) to establish coordinates at the firing point. (For guidance on using the PLGR or DAGR, see chapter 9.) When location data are determined by hasty survey or map reading skills, the distance traveled by the MLRS between update points cannot exceed 6 kilometers. The unit must train and rehearse these techniques at every opportunity, both in the field and in garrison, to ensure that personnel have the skills needed to consistently obtain accurate results. It must be understood that these alternative methods are to be used only in emergency situations. 3-31. Maintain maps and files of survey data for the battalion AO, and coordinate survey activities with higher, lower, and adjacent headquarters.