The U.S. Air Force (USAF) proposes to launch six Milstar Satellites from Cape Canaveral Air Force Station (CCAFS), Florida, using a Titan IV launch vehicle with a Centaur upper stage (Titan IV/Centaur). The primary mission of Milstar is to provide the next generation of Military Satellite Communication (MILSATCOM) systems to complement Navy’s Fleet Satellite Communication System, Air Force’s Sa...

In the near future low earth orbit (LEO) satellite communication networks will partially substitute for fixed terrestrial multimedia networks especially in sparsely populated areas. Unlike fixed terrestrial networks, ongoing calls may be dropped if satellite channels are shadowed. Therefore, in most LEO satellite communication networks more than one satellite need to be simultaneously visible i...

This study presents the “overview of TCP performance on satellite communication networks”, aimed at satellite characteristics, their effects on throughput selected link control protocols and various method proposed for enhancing TCP throughput on satellite networks. Literature reviews on satellite link characteristics and their effects on TCP operation in satellite communication networks. Diffe...

Satellite communication is well known in providing best services where broadcasting is essential, where terrain is hostile and very sparsely populated. It also has niche where rapid deployment is very critical and important. In Global Network Infrastructure satellite is considered as an inseparable component of the communication infrastructure. A variety of research work has been explored and p...

objective: parents are believed to be among the most influential adults who have a deterministic role in the success of interventional programs on adolescents' reproductive health. the aim of this study is to describe parents' perceptions and attitudes towards adolescent reproductive needs, experiences and associated factors. method: a population-based study of 539 parents of adolescent boys, a...

The basic free-space optical communication system includes at least two satellites. To communicate between them, the transmitter satellite must track the beacon of the receiver satellite and point the information optical beam in its direction. Optical tracking and pointing systems for free space suffer during tracking from high-amplitude vibration because of background radiation from interstell...

This article presents the design and development of a satellite cluster system that supports an in-terfederation communication in High Level Architecture (HLA)–compliant distributed simulation. The interfederation communication enables the execution of a complex, large-scale cluster system of distributed satellites that share the dispersed data assets among satellite components collaboratively....

A satellite communication is suitable for broadcasting service and long-hual transmission based on telecommunications. In the satellite communication environment, unauthorized user should not have to obtain his/her required services from the satellite communication systems without authentication. Therefore, authentication is an important security technique to prevent illegal service requests. Q...