In this research, a back-propagation neural network was used to retrieve and map the surface soil moisture in Oklahoma (97d35'W, 36d15'N) from Synthetic Aperture Radar data acquired by RADARSAT-1 satellite. In addition to SAR backscattering, different vegetation-related information (vegetation optical depth and Normalized Difference Vegetation Index) have been added as additional inputs to the ...

Development of Distributed Generic Simulator (GenSim) through Invention of Simulated Network (simNetwork) Cheol-Hea Koo, Hoon-Hee Lee, and Yee-Jin Cheon Satellite Flight Software Department, Satellite Technology Division, Korea Aerospace Research Institute, Daejeon 305-333, Korea Satellite Control System Department, Satellite Technology Division, Korea Aerospace Research Institute, Daejeon 305-...

Geostationary satellite networks are currently considered as one of the most promising broadband access network technology for narrowing the digital divide. Though technically attractive and cost effective, the provisioning of endto-end QoS services in satellite access remains largely undefined. In order to bridge this gap, the European SATIP6 project defines a complete QoS architecture involvi...

The paper begins suggesting a possible framework to classify the different approaches to modify the transport layer (namely, the TCP) over satellite channels. In one case, the satellite network is considered as a black box (Black Box BB approach). Each modification is performed within the end terminals. In the other case, the satellite network is completely known and the transport layer paramet...

Heterogeneous graph neural networks (HGNNs) have the powerful capability to embed rich structural and semantic information of a heterogeneous into node representations. Existing HGNNs inherit many mechanisms from (GNNs) designed for homogeneous graphs, especially attention mechanism multi-layer structure. These bring excessive complexity, but seldom work studies whether they are really effectiv...

Satellite communication promises potential methods for providing global communication. In particular, by the development of a Low Earth Orbital (LEO) satellite constellation, both global coverage and broadband communication will be accessible. Problems arise in situations where various tra¢ c types in broadband communication require di¤erent levels of quality of service (QoS). Tra¢ c control is...