An improved cloud shadow removal algorithm for high spatial resolution optical satellite data over land is presented. The method based on the matched filter method, which consists of calculation a covariance matrix and corresponding zero-reflectance vector computation function. new additions consist usage an map further evaluations performed performance incorporated in software package Python-b...

Abstract This paper describes and discusses the preprocessing calibration of magnetic data taken by navigational magnetometers onboard two GRACE satellites, with focus on almost 10 years period from January 2008 to end mission in October 2017 for which 1-Hz are available. A is performed comparing raw magnetometer sensor readings model vector values as provided CHAOS-7 geomagnetic field time pos...

precise geoid determination on islands suffers from the lack of accurate gravity data on the open seas. nowadays, sub-microgal accuracy for the land gravity observations is obtainable. but the sea gravity data which are collected via shipborne techniques, due to the measuring environment at sea area, are usually highly noisy and are contaminated with various systematic errors. on the other hand...