In this paper, we analyze the performance of protocols in a network that consists of both satellite and terrestrial components. One method, proposed by outside research, to improve the performance of network transfers over satellite is to use a performance enhancing proxy often dubbed spoofing. Spoofing involves the transparent splitting of a network connection between the source and destinatio...

In this paper, an FPGA based FIR filter for Satellite Application is presented. The implementation is based on Factored Canonic signed digit (FCSD) which eliminates the use of embedded multipliers. The FIR filter has been implemented using Equiripple on an FPGA. In Equiripple, the ripples are distributed more evenly over pass band and stop band which results in a better approximation of desired...

This paper presents current and future uses of Differential Satellite Navigation Systems in Sierra Research’s Automatic Flight Inspection Systems (AFIS). The purpose of an Automatic Flight Inspection System is to inspect and calibrate ground-based aircraft navigation and landing aids. In Sierra’s inertial-based flight inspection system, a square root Kalman filter estimates the navigation error...

Abstract The standardization of a Return Channel via Satellite (DVB-RCS) and the satellite community efforts in term of interoperability over the last few years are expected to play, in a near future, a decisive role in Next Generation Networks (NGNs) through the integration of Satellite networks as an alternative to terrestrial networks like DSL (Digital Subscriber Line) in low terrestrial inf...

Position of surface objects can be fixed in many ways. The most popular radionavigational systems, including satellite systems, make possible obtaining nearly continuous and very precise ship’s position. However, under the water application of radionavigational systems is impossible. Underwater navigation requires other tools and solutions then these encountered in surface and air navigation. I...

The European Proximity Operation Simulator (EPOS) of the DLR-German Aerospace Center is a robotics-based simulator that aims at validating and verifying a satellite docking phase. The generic concept features a robotics tracking system working in closed loop with a force/torque feedback signal. Inherent delays in the tracking system combined with typical high stiffness at contact challenge the ...

The performance of the Multicast Dissemination Protocol (MDP) in a simulated satellite channel is investigated. The environment that is modeled is that to be expected in a small satellite communications environment including channel errors and link interruptions. The satellite link is simulated with a channel environment simulator. The performance of MDP is compared with file transfer protocol ...

The exploitation of Adaptive Coding and Modulation (ACM) techniques for the forward link (satellite-to-user) of broadband communication satellites operating at Ka-band and above has been shown to theoretically provide large system capacity gains. In this article, the problem of how to accurately estimate the time variant channel and to adapt the physical layer mitigating the effects of estimato...