HR: 11:05h
AN: G32A-04    [Abstracts]
TI: Precise Geodesy Programs at the Naval Research Laboratory
AU: * Brozena, J M
EM: john.brozena@nrl.navy.mil
AF: Naval Research Laboratory Marine Physics Branch, Code 7420, 4555 Overlook Ave SW , Washington, DC 20375, United States
AU: Childers, V A
EM: vicki.childers@nrl.navy.mil
AF: Naval Research Laboratory Marine Physics Branch, Code 7420, 4555 Overlook Ave SW , Washington, DC 20375, United States
AB: For the past decade the Naval Research Laboratory independently and in collaboration with KMS, NOAA, NGA and NAVOCEANO has maintained an active program in developing precise geoid models. The Navy focus has been in the development of precise coastal reference frames for applications to coastal oceanography and hydrography. Our primary tool has been airborne gravimetry used to fill in data gaps, and to serve as a self consistent survey to detect and correct problems such as incorrect tie values in the historical data. Most recently we have been utilizing high-altitude surveys (7.5-10.5 km) flown on the NRL P-3 and the NOAA Citation. The attenuation of short wavelengths with altitude permits wider line spacing without aliasing and minimizes the effects of terrain corrections. At the same time true air-speeds are increased over low altitude operations. Both factors increase the cost effectiveness of geodetic surveys, allow the coverage of larger areas in less time than would be possible at lower altitudes. High-altitude profiles also generally provide a benign environment for the acquisition of good quality gravimetry. We will show recent work conducted over Afghanistan and the Gulf of Mexico and discuss plans for a comprehensive airborne geodetic survey of the southeastern border of the United States.
DE: 1219 Gravity anomalies and Earth structure (0920, 7205, 7240)
DE: 1222 Ocean monitoring with geodetic techniques (1225, 1641, 3010, 4532, 4556, 4560, 6959)
DE: 1229 Reference systems
DE: 1294 Instruments and techniques
SC: Geodesy [G]
MN: 2007 Joint Assembly