jgg     2013 33 (增2):  84-87    ISSN: 0412-1961  CN: 21-1139/TG RESEARCH ON SINUSOIDAL EXCITATION SOURCE OF CAPACITIVE  MICROMETER FOR AIRBORNE GRAVITY MEASUREMENT SYSTEM  BASED ON DDS TECHNOLOGY 1） Key Laboratory of Dynamic Geodesy, Institute of Geodesy and Geophysics, CAS, Wuhan 430077 2） University of Chinese Academy of Sciences, Beijing 100049 Received: 2013-04-09  Revised: null  Online: 2013-10-24 Supporting info