used to determine wind vector information from theradiosonde. Units without GPS use a VLF antenna tomonitor reception of the OMEGA network NAVAIDsignals, which can be used to determine the sameinformation. A printer is also included in the system.The receiver can operate in nearly any environmenton 110V or 220V alternating current, or on 24V directcurrent.However, make sure you keep the systemsheltered from precipitation while in use. The VLF andUHF antennas should be mounted at least 8 feet apart. Ifworking aboard ship, mount the antennas as high on theships superstructure as possible, while avoiding radarantennas and other transmitters.In addition toequipment listed, a computer may be connected to theMRS for direct download of observation data todiskette. Data disks are then forwarded to the FleetNumerical Meteorology and OceanographyDetachment (FNMOD), Asheville, North Carolina, forarchiving. Figure 1-4 shows the overall operatingscheme of the system.MRS OPERATIONOperation of the AN/UMQ-12 is very simple and isdetailed in the operator’s manual, MWOP-00139-3.2,Figure 1-4.—MRS system diagram (VLF-Omega).1-5
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