This paper considers the transport layer implications by assuming a position where satellite networks form one integrated component of a hybrid Internet architecture. It reviews the key role of transport protocols in providing a reliable and robust end-to-end Internet service. A history of TCP protocol evolution from a satellite perspective is followed by focussing on the role of protocol-enhan...

[1] High-resolution (0.1 0.1 ) geostationary satellite infrared radiances at 11 mm in combination with gridded (2.5 2.0 ) hourly surface precipitation observations are employed to document the spatial structure of the diurnal cycle of summertime deep convection and associated precipitation over North America. Comparison of the diurnal cycle pattern between the satellite retrieval and surface ob...

It is well-known that the transmission control protocol (TCP) does not perform well in wireless and satellite environments. We investigate the use of cross-layer design involving the transport and medium access control (MAC) layers in the context of a geostationary bandwidth-on-demand satellite network to simultaneously enhance TCP performance and to improve bandwidth utilization. In this paper...

An algorithm was developed to estimate aerosol optical depth (AOD) from geostationary satellite data. The 6S radiative transfer computer code was employed to generate a look-up table (LUT) which incorporates several combinations of satellite-derived variables including earthatmospheric reflectivity, atmospheric reflectivity and surface albedo. The parameterization of the satellite-derived atmos...

This paper investigates the effect of the Radio Link Control (RLC) operation modes for different types of UMTS traffic over a Satellite High Speed Downlink Packet Access (SHSDPA) air interface. Satellite Systems are expected to complement the terrestrial access network and work with the same core network. The geostationary bent-pipe satellite has been considered for this work. The transmission ...

Chinese BeiDou Navigation Satellite System is officially operational as a regional constellation with five Geostationary Earth Orbit (GEO) satellites, five Inclined Geosynchronous Satellite Orbit (IGSO) satellites and four Medium Earth Orbit (MEO) satellites. Observations from the BeiDou Experimental Tracking Stations (BETS) and the IGS Multi-GNSS Experiment (MGEX) network from 1 January to 31 ...

The means of achieving full duplex broadband access to either the home or office has been the focus of much research and entrepreneurial development in the past 5 years. This is the so-called “last mile” problem. One approach is duplex access to either a geostationary earth orbit (GSO) or non-GSO satellite, through a relatively small satellite dish located at each home or office. This scenario ...

A two-channel temporal updating system is presented, which accounts for feature changes in the visible and infrared satellite images. The system uses two probabilistic neural network classifiers and a context-based predictor to perform continuous cloud classification during the day and night. Test results for 27 h of continuous classification and updating are presented on a sequence of Geostati...

Abstract—Circularly-polarized arrays of cavity backed slot (CBS) antennas are proposed for X-band satellite-earth communications. Two configurations of such circularly polarized arrays are investigated: cross-shaped and square-shaped arrays. Both configurations can produce right-hand circular polarization (RHCP) as well as lefthand circular polarization (LHCP) by proper setting of excitation ph...

This paper evaluates the effects of bandwidth asymmetry introduced in a geostationary DVB-RCS satellite architecture on the Round Trip Time of the Transmission Control Protocol (TCP). In particular, it shows the analytical analysis of the round trip time (RTT) of a TCP connection and defines a bandwidth asymmetry index, which is the key point of the work. The final goal is the provision of anal...