ATP-3-09-02 Field Artillery Survey Download
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Chapter 3 3-4 ATP 3-09.02 16 February 2016 BATTALION AND BATTERY SCPS 3-16. As mentioned earlier, survey control for artillery units may be available in the form of SCPs established by technical engineer specialist geodetic surveyors or trigonometric lists containing data for stations located near the unit. The locations of SCPs established by the BCTs FA battalion survey teams must allow for the survey capability of the battalion. An SCP must be provided within 2 kilometers of the center of the battalion position area if the IPADS or IPADS-G is the primary method of survey. The BCT Chief Surveyor may task organic FA battalions to provide survey control for supporting units located in the battalion AO. FIRING BATTERY POSITIONS 3-17. Survey requirements in each firing battery position are described below. Battery SCPs. Will provide coordinates and height for weapon systems position updates. Azimuth will be determined from Orienting Station. Orienting station (OS). The OS is a station used by the firing battery or platoon personnel to orient the weapons. The coordinates and height of the OS and a line of known direction are required. The position of the OS is usually selected by the battery commander or fires battery platoon leader, but it can be selected by the survey personnel. The frequent moves and the many positions required will not always allow the battery commander and/or platoon leader to select all OSs. The relative locations of the OS and end of orienting line (EOL) usually are addressed in the unit survey SOP. EOL. The EOL is a survey station used as an azimuth mark for the OS. The EOL must be located so that it is visible and at least 100 meters from the OS. Orienting line (OL). An OL is a line of known direction materialized on the ground in each position area. It is used as a reference direction for orienting instruments and for laying weapons for direction. When using IPADS or IPADS-G to establish the OL, the two-position mark is the preferred method. If optical transfer is used by achieving auto-reflection, a one-position angle must be measured. FIELD ARTILLERY RADAR LOCATIONS 3-18. If a WLR section is attached to a FA battalion, the coordinates and the height of the radar position (near stake) and a line of known direction to an azimuth mark (far stake) are required. The distance and vertical angle to an azimuth mark is also required. The battalion survey team is responsible for determining this data. Usually, the FAB or DIVARTY WLRs will be located near one of the FA battalions. FABs and DIVARTY may task the nearest FA battalion to provide survey control. The radars require coordinates and height of the radar position and distance and direction to an azimuth mark. 3-19. . The IPADS or IPADS-G is the primary means of obtaining survey control for the radars. When the IPADS or IPADS-G is not available before the radar section occupies the radar site, the radar section will conduct a hasty survey. The hasty survey will provide the data for initializing the radar. If the IPADS or IPADS-G team arrives after the hasty survey has been completed, the data determined by the IPADS or IPADS-G survey will be entered into the radar computer instead of the hasty survey data. Azimuth required by the WLR radars must be accurate within 0.4 mil. The position accuracy required is 10 meters. The vertical interval accuracy is 10 meters for the AN/TPQ-36, AN/TPQ-50, AN/TPQ-53, and 3 meters for the AN/TPQ-37. However, the weapon location accuracy of the WLRs is greatly enhanced by keeping the vertical interval accuracy within 3 meters. This accuracy is within the capabilities of the IPADS survey. ALTERNATE, SUPPLEMENTARY, AND OFFSET POSITIONS 3-20. Survey of alternate, supplementary, and offset positions should be performed as soon as survey operations for primary positions are completed. Survey requirements for alternate positions are the same as those for primary positions.