국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	New Analysis of Lunar Prospector Radio Tracking Data Brings the Nearside Gravity Field of the Moon with an Unprecedented Resolution
저자	Han, Shin-Chan;; Mazarico, Erwan;; Rowlands, David;; Lemoine, Frank;; Goossens, Sander
Keyword	BANDWIDTH;; CRATERS;; DOPPLER RADAR;; EXTRACTION;; GEOPHYSICS;; GRAVITATIONAL FIELDS;; GRAVITY ANOMALIES;; HIGH RESOLUTION;; LOW ALTITUDE;; LUNAR PROSPECTOR;; RADIO TRACKING;; RECONNAISSANCE;; TOPOGRAPHY
URL	http://dx.doi.org/10.1016/j.icarus.2011.07.020
보고서번호	GSFC.JA.5446.2011
발행년도	2011
출처	NTRS (NASA Technical Report Server)
ABSTRACT	A new analysis of the Doppler tracking data from the Lunar Prospector mission in 1999 revealed a number of previously-unseen gravity anomalies at spatial scales as small as 27 km over the nearside. The tracking data at low altitudes ࿒ km or below) were better analyzed to resolve the nearside features without dampening from a power law constraint, by partitioning the gravity parameters concentrated on either the nearside or farside. The resulting model presents gravity anomalies correlated with topography with a correlation coefficient of 0.7 or higher from degree 50 to 150, the widest bandwidth yet. The gravity-topography admittance of approx. 70 mGal/km is found from numerous craters of which diameters are 60 km or less. In addition, the new model produces orbits that fit to independent radio tracking data from the Lunar Reconnaissance Orbiter and Kaguya (SELENE) better than previous gravity models. This high-resolution model can be of immediate use to geophysical analysis of small craters. Our technique could be applied to an upcoming mission, the Gravity Recovery And Interior Laboratory and useful to extract short wavelength signals from the MESSENGER Doppler data.