72 



The AEM system has many potential non-military applications. NOAA 

 and the US Army Corps of Engineers could use the technology to rapidly 

 measure bathymetry In harbors and coastal regions of the U.S. Working 

 with the US Army Corps of Engineers, the system has demonstrated the 

 capability to locate and map buried erosion control structures on the 

 banks of the Mississippi River. Due to the system's ability to measure 

 water conductivity. It can be used to locate and map salt water intrusions 

 into bays and rivers, such as the salt water wedge that traveled up the 

 Mississippi River, threatening the New Orleans drinking water supply. 

 Similarly, the system has the potential to identify weak spots in river 

 levees that have become saturated with water. 



AIRBORNE GRAVIMETRY AND PRECISE KINEMATIC GPS 



An Airborne Gravity Survey System (AGSS) coupled with a Global 

 Positioning System (GPS) was developed to simplify the logistics and 

 reduce the cost of obtaining detailed gravity data over land, ice and the 

 ocean. This information is important in navigation. Recent S&T efforts 

 through a cooperative effort with NOAA's National Geodetic Survey have 

 developed a precise kinematic GPS as a source of 3-d positioning. When 

 the system is used with a calibrated accurate airborne laser or radar 

 altimeter, it can provide topographic profiles along the flight path. One 

 system is small enough to fit into a Twin Otter, and has been used with 

 the USGS and NSF to acquire gravity and ice thickness in Antarctica. A 

 larger system was flown under sponsorship of the Oceanographer of the 

 Navy in cooperation with the European Space Agency to verify ERS1 

 satellite altimetry data. 



REGIONAL AEROMAGNETICS 



The CNR has had. for over twenty years, an international cooperative 

 program of regional aeromagnetic investigations and scientific studies of 

 marine seafloor tectonics. This data are used in ASW and navigation. 



The research started in the Arctic in 1972. with an experiment to 

 study the tectonics of the Nonvegian-Greenland Sea through the use of 

 Navy operational aircraft. The program has continued to sponsor high 

 quality regional geophysical investigations world-wide since that time. 

 Arctic studies continued through to the mid-70s. This was followed by 

 studies of the Fiji-New Zealand plateau, basin and trench systems in the 



