A Transatlantic Communication Experiment via Echo I Satellite

Cellular Networks, Satellite Communication 1 Satellite Communication

A satellite communications system is based on antennas in a stable orbit above the earth. Satellites serve as relay stations in the sky. The basic idea of satellite communications is that two stations on earth discuss via one or more satellites. So a little bit of satellite-related terminology: 1. Earth station is an antenna on or near the surface of the earth. 2. Uplink is a transmission from ...

Commissioning the Echo-Seeding Experiment ECHO-7 at SLAC∗

ECHO-7 is a proof-of-principle echo-enabled harmonic generation (EEHG) FEL experiment in the Next Linear Collider Test Accelerator (NLCTA) at SLAC. The experiment is intended to test the EEHG principle at low electron beam energy, 120 MeV, and determine the sensitivities and limitations to understand the expected performance at the higher energy scales and harmonic numbers required for xray FEL...

Reliable Multicast via Satellite: Uni-directional versus Bi-directional Communication

We investigate reliable multicast communication over satellite networks. We compare a scenario where receivers can use a feedback channel to signal loss to a scenario where no feedback channel is available. We show that the introduction of a feedback channel is the key to allow for bandwidth-e cient, robust, and fully reliable multicast communication via satellite.

A Laser Communication Experiment Utilizing the ACT Satellite and an Airborne Laser Transceiver

The launch o f a l a s e r communication t r a n s m i t t e r package i n t o geosynchronous e a r t h o r b i t onboard the Advanced Communications Technology ( A C T ) s a t e l l i t e w i l l p resen t an e x c e l l e n t o p p o r t u n i t y f o r t h e exper imenta l r e c e p t i o n o f l a s e r communication s i g n a l s t r a n s m i t t e d from a space o rS i t . The ACTS l a s...

Raven: Developing a Surgical Robot from a Concept to a Transatlantic Teleoperation Experiment