Gravity Potential Comparative Analysis around Korean Peninsula by EGM96 and EIGEN-CG01C Models

EGM96와 EIGEN-CG01C 모델에 의한 한반도 주변의 중력포텐셜 비교분석

  • 유상훈 (연세대학교 지구시스템과학과) ;
  • 김창환 (한국해양연구원 해저환경 자원연구본부) ;
  • 민경덕 (연세대학교 지구시스템과학과)
  • Published : 2005.05.01

Abstract

According to development of satellite geodesy, gravity potential models which have high accuracy and resolution were released. Using the EIGEN-CG01C model based on low orbit satellite data such as CHAMP and GRACE and the EGM96 model, geoid and gravity anomaly were calculated and compared. The study area is located at $123^{\circ}{\sim}132^{\circ}$ E, $33^{\circ}{\sim}43^{\circ}$ including Korea. Comparing two models, very high correlation more than 0.90 in geoid and gravity anomaly was observed, but in amplitude analysis the EIGEN-CG01C model have higher amplitude in high frequency area. Gravity anomaly calculated with both models shows a little difference in North Korea and some coast area of the Yellow sea. Through power spectrum analysis, residual anomaly that can be used in large scale structure or underground resources survey was calculated.