Fig. 1From: 3D inversion of full gravity gradient tensor data in spherical coordinate system using local north-oriented frameGeometry of the tesseroid (Heck and Seitz 2006), point O is the original point of the SCS; r1 and r2, λ1 and λ2, as well as \(\varphi_1\) and \(\varphi_2\) are the boundaries in radial, longitude, and latitude directions, respectively. Point Q here denotes the geometric center of the tesseroid, and point P is an observation data pointBack to article page