Inter-satellite links (ISLs) can improve the performance of Global Navigation Satellite System (GNSS) in terms precise orbit determination, communication, and data-exchange capabilities. This research aimed to evaluate a simulation-based processing strategy involving exploitation ISLs determination Galileo satellites, which are not equipped with operational ISLs. The estimation process is first...

We performed a comparison between the interpolation methods of Kriging and Least Squares Collocation. This allowed to obtain an optimal velocity model earth’s crust for continental Ecuador from field ITRF2008 obtained with GNSS data in period 2008-2014. The best fitting semivariograms two components were Spherical Stable semivariogram. functional Collocation method was third order East componen...

The following NDSC stations have been included as ozonesonde stations so far and are supposed to deliver sonde data to the NDSC data base: Ny-Ålesund, Thule, Eureka, Observatoire de Haute Provence, Mauna Loa, Lauder, Dumont d’Urville, McMurdo, South Pole. One should consider whether more stations should be included as there are more NDSC stations with ozonesonde facilities either at the site or...

Radar warning systems are found in all modern fighter aircraft and their main purpose is to warn pilots of enemy military units such as radar stations, aircraft and missiles. Testing these systems for fighters in real life is an expensive, complex and somewhat dangerous task. Hence engineers aim to test these systems in an artificial environment by the use of software in order to simulate hour-...