Atmospheric delay corrections for satellite altimetry measurements are essential deriving highly accurate sea surface heights and reliable global mean level (GMSL) trend estimates. A commonly used method to correct ionospheric path delays the usage of GNSS-based Global Ionospheric Maps (GIM). The different orbit GNSS altimeter satellites require an adaption GIM account free electrons in Earth p...

We present results of contemporary coastal sea level changes along the coasts Western Africa, obtained from a dedicated reprocessing satellite altimetry data done in context ESA ‘Climate Change Initiative’ project. High sampling rate (20 Hz) Jason-1 and Jason-2 missions over 14-year-long time span (July 2002 to June 2016) are considered. The were first retracked using ALES adaptative leading ed...

Jason E. Farrar,1 Michelle Nater,1 Emi Caywood,1 Michael A. McDevitt,2 Jeanne Kowalski,3 Clifford M. Takemoto,4 C. Conover Talbot Jr,5 Paul Meltzer,6 Diane Esposito,7 Alan H. Beggs,8,9 Hal E. Schneider,8 Agnieszka Grabowska,8 Sarah E. Ball,10 Edyta Niewiadomska,11 Colin A. Sieff,9,12,13 Adrianna Vlachos,14 Eva Atsidaftos,14 Steven R. Ellis,15 Jeffrey M. Lipton,14 Hanna T. Gazda,8,9 and Robert J...

Jason P Bentley, Jane B Ford, Lee K Taylor, Katie A Irvine, and Christine L Roberts * 1 Clinical and Population Perinatal Health Research, Kolling Institute of Medical Research, Sydney Medical School, University of Sydney, Sydney, Australia 2 Centre for Epidemiology and Research, NSW Ministry of Health, Sydney, Australia 3 Centre for Health Record Linkage, Cancer Institute, Sydney, Australia * ...

In this paper we study context–sensitive versions of bidirectional Optimality Theory (OT). We discuss a problem presented by Jason Mattausch which shows that context–sensitivity may lead into circularity. In order to be able to represent it we introduce a fundamental structure for bidirectional OT which we call Blutner structure. The discussion of Mattausch’s Example leads us to combine bidirec...

Modeling and regulating interactions among agents is a critical step in the development of Multiagent Systems (MASs). Some recent works assume a normative view, and suggest to model interaction protocols in terms of obligations. In this paper we propose to model interaction protocols in terms of goals and commitments, and show how such a formalization promotes a deliberative process inside the ...

This paper presents the Coastal Altimetry Waveform Retracking Expert System (CAWRES), a novel method to optimise the Jason satellite altimetric sea levels from multiple retracking solutions. CAWRES’ aim is to achieve the highest possible accuracy of coastal sea levels, thus bringing measurement of radar altimetry data closer to the coast. The principles of CAWRES are twofold. The first is to re...