ACR Electronics SAT2 Product Support Manual

Also see for RapidFix 406: Product support manual Product support manual

Contents

Y1-03-0148-2 Rev. K 14The LUT processes the Doppler-shifted signal from the LEOSAR and determines the location of the beacon, then theLUT relays the position of the distress to a Mission Control Center (MCC) where the distress alert and locationinformation is immediately forwarded to an appropriate Rescue Coordination Center (RCC). The RCC dispatchesSearch and Rescue (SAR) forces.The addition of the GEOSAR satellite system greatly improves the reaction time for a SAR event. This satellite systemhas no Doppler capabilities at 406 MHz, but will relay the distress alert to any of the LUT stations. When there is GPSdata included in the distress message, SAR authorities instantly know your location to within 110 yards (100 m). Thisspeeds up the reaction time by not having to wait for one of the LEOSAR satellite to pass overhead. Because most ofthe search and rescue forces presently are not equipped to home in on the 406 MHz Satellite beacons signal, homingmust be accomplished at 121.5 MHz.7.3 Global Positioning System (GPS)The GPS system is a satellite group that enables a GPS receiverto determine its exact position to within 30 m (100 ft.) anywhereon earth. With a minimum of 24 GPS satellites orbiting the earth atan altitude of approximately 11,000 miles they provide users withaccurate information on position, velocity, and time anywhere inthe world and in all weather conditions. The RapidFix™ stores thisdata into its distress transmission allowing search and rescueforces to narrow the search into a very small area and thusminimize the resources required and dramatically increase theeffectiveness of the overall operation.Figure 12 - GPS Satellite OrbitsFigure 10- Satellite Coverage Figure 11- GEOSAR Satellite Orbits