Analysis of Stochastic Properties of GPS Observables
Vazquez Becerra, Guadalupe Esteban, 1973- (2008-10)
Traditionally, data processing for GPS positioning requires modeling considerations underlying the observations. The variance-covariance (v-c) matrix (as part of the stochastic model) usually comprises only the variances ...
On Improving the Accuracy and Reliability of GPS/INS-Based Direct Sensor Georeferencing
Yi, Yudan, 1974- (2007-12)
Due to the complementary error characteristics of the Global Positioning System (GPS) and Inertial Navigation System (INS), their integration has become a core positioning component, providing high-accuracy direct sensor ...
Recovery of Terrestrial Water Storage Change from Low-Low Satellite-to-Satellite Tracking
Chen, Yiqun, 1975- (2007-12)
Gravity Recovery and Climate Experiment (GRACE) spaceborne gravimetry provides a unique opportunity for quantifying geophysical signals including terrestrial water storage change for a wide variety of climate change and ...
Small Anomalous Mass Detection from Airborne Gradiometry
Dumrongchai, Puttipol, 1970- (2007-03)
A new generation of gradiometer technology is currently under development based on atom interferometry and applicable to ground and airborne mapping of geologic or anthropogenic features with signal strength as low as a ...
Satellite Radar Altimetry for Inland Hydrologic Studies
Zhang, Manman (2009-03)
Satellite radar altimetry, which is originally designed to measure global ocean surface height, has been applied to inland surface water hydrologic studies. We have developed a water-detection algorithm based on statistical ...
Geoid Determination Based on a Combination of Terrestrial and Airborne Gravity Data in South Korea
Yang, Hyo Jin (2013-12)
The regional gravimetric geoid model for South Korea is developed by using heterogeneous data such as gravimetric measurements, a global geopotential model, and a high resolution digital topographic model. A highly ...
Covariance expressions for second and lower order derivatives of the anomalous potential
Tscherning, C. C. (1976-01)
Auto- and cross-covariance expressions for the anomalous potential of the Earth and its first and second order derivatives are derived based on three different degree-variance models. A Fortran IV subroutine is listed ...
Direct Sensor Orientation in Airborne and Land-based Mapping Applications
Grejner-Brzezinska, Dorota A. (2001-06)
Since the early 1990s, the concept of Mobile Mapping Systems (MMS) has evolved from rather simple land-based systems to more sophisticated, real-time multi-tasking and multi-sensor systems, operational in land and airborne ...
Global Ice Mass Balance and its Contribution to Early Twenty-first Century Sea Level Rise
Duan, Jianbin (2014-03)
Geometric Constraints in Image Sequence and Neural Networks for Object Recognition
Li, Ron; Wang, Weian; Tseng, Hong-Zeng (1997-09)
Spatially referenced mobile mapping image sequences contain rich information for applications such as transportation and utility management. Automatic object recognition and measurement from the images for reducing human ...