For real-time precise orbit determination (POD) of low earth (LEO) satellites, high-accuracy global navigation satellite system (GNSS) and clock products are necessary in real time. Recently, the Japanese multi-GNSS advanced demonstration analysis point positioning (PPP) service new generation Australian/New Zealand satellite-based augmentation (SBAS)-aided PPP provide free GNSS that directly b...

In a market of services, customers require Service Based Applications (SBAs) with specific QoS constraints usually expressed as end–to–end requirements. Here, we show that mechanisms used to find Pareto optimal agreements can be extended in order to compute them also in the case of negotiation for market–based service composition, where different provider agents compete to provide the same serv...

This is anOp Abstract – This work reviews an ionospheric activity indicator useful for identifying disturbed periods affecting the performance ofGlobal Navigation Satellite System (GNSS). This index is based in the AlongArc TEC Rate (AATR) and can be easily computed from dual-frequency GNSS measurements. The AATR indicator has been assessed over more than one Solar Cycle (2002–2017) involving a...

Landslides in high-order position areas pose a serious threat to residents located below such areas. Therefore, research on the evolution process and underlying dynamic mechanisms is crucial. The majority of relevant studies are based landslides that have already occurred; however, investigation potential higher value. In this study, progressive landslide identification method proposed with app...

Landscape maps based on multivariate cluster analyses provide an objective and comprehensive view the (marine) environment. They can hence support decision making regarding sustainable ocean resource handling protection schemes. Across a large number of scales, input parameters classification methods, numerous studies categorize into seascapes, hydro-morphological provinces or clusters. Many th...

In the Beijing plain, the long-term groundwater overexploitation, exploitation, and the utilization of superficial urban space have led to land subsidence. In this study, the spatial–temporal analysis of land subsidence in Beijing was assessed by using the small baseline subset (SBAS) interferometric synthetic aperture radar (InSAR) technique based on 47 TerraSAR-X SAR images from 2010 to 2015....

Society, including many European governments, has a strong belief in the reliability of today’s primary radio navigation system, GPS. Unfortunately, space-based as well as terrestrial-based systems have some serious limitations that cannot be ignored if continuity of service plays a keyrole in the process in which these systems are used. The paper indicates some weaknesses of radio navigation s...

This paper has collected 7 scenes of L band PALSAR sensor radar data of a mine in FengCheng city, jiangxi province, using the Small-baseline Subset (SBAS) method to invert the surface subsidence of the mine. Baselines of interference less than 800m has been chosen to constitute short baseline differential interference atlas, using pixels whose average coherent coefficient was larger than or equ...