A spatiospectral localization method is discussed for processing the global geopotential coefficients from satellite mission data to investigate time-variable gravity. The time-variable mass variation signal usually appears associated with a particular geographical area yielding inherently regional structure, while the dependence of the satellite gravity errors on a geographical region is not s...

The aim of this study was to classify the most frequently observed atmospheric circulation anomaly patterns in eastern Africa and the adjacent Indian Ocean. As an example of the usefulness of such a classification, the second objective was to test whether these patterns account for intraseasonal rainfall anomalies in the region. A partitioning algorithm, known as dynamical cluster analysis, was...

[1] We survey the IPCC AR4 models’ responses to SRES A1B forcing in order to evaluate a prediction of climate change common to all models and testable using GPS radio occultation data over the coming decades. Of the IPCC AR4 models that submitted runs of the SRES A1B forcing scenario, we select twelve because of the timeliness of their submission. Trends in the global average surface air temper...

Recent Digital Surface, Elevation, and Bathymetric Models (DSM/DEM/DBM) aim to provide high-resolution accurate height depth information needed for a variety of surveying, geodetic, geophysical, other applications. In this study, first we validate in two test areas some the most used models, i.e., ASTER GDEM; AW3D30 DSM; Copernicus DEM; EU-DEM; GEBCO 2020; NASADEM HGT; SRTM15+ SRTM Global, usin...

Dynamical coupling between the stratospheric and tropospheric circumpolar circulations in the Arctic has beenwidely documented onmonth-to-month and interannual time scales, but not on longer time scales. In the Antarctic, both shortand long-term coupling extending from the stratosphere to the surface has been identified. In this study, changes in Arctic temperature, geopotential height, and ozo...

This work presents a precise analytical model to reconstruct the line-of-sight vector target satellite over time, as required by angles-only relative navigation systems for application rendezvous missions. The includes effects of geopotential, featuring: propagation in mean orbital elements (up second-order expansion), two-way osculating/mean elements’ conversion (second-order J2 and up given d...