Operator of the Apstar series of communications satellites in the Asia Pacific region, providing satellite services, including broadband media and television services.

APT launched its first satellite, APSTAR-1, in 1994.

APSTAR-V and APSTAR-VI is the new generation (as of Nov. 2012) of high-power and high-reliability communication satellites.

A Tracking and Data Relay Satellite (TDRS) is a type of communications satellite.

Such a satellite forms part of the Tracking and Data Relay Satellite System (TDRSS) used by NASA and other United States government agencies for communications to and from independent "User Platforms" such as satellites, balloons, aircraft, and the International Space Station. This system was designed to replace a pre-existing worldwide network of ground stations that had supported all of NASA's manned flight missions and unmanned satellites in low-Earth orbits. The primary system design goal was to increase the amount of time that these spacecraft were in communication with the ground and improve the amount of data that could be transferred. These TDRSS satellites are all designed and built to be launched to and function in geosynchronous orbit.

The NASA Visualization Explorer — a nice way to get stories about NASA's exploration of the Earth, sun, moon, planets and universe. Each story will take you on a remarkable journey into the science of NASA, brought to life.

NASA's Science Mission Directorate is organized into four disciplines: Heliophysics, Planetary, Astrophysics and Earth science. This project is putting imagery and data from this exploration at your fingertips. 

The Focusing Optics x-ray Solar Imager (FOXSI) is a sounding rocket payload to test hard x-ray (HXR) focusing optics and position-sensitive solid state detectors for solar observations.

The mission is funded under the NASA Low Cost Access to Space program. The FOXSI project is led by the Space Sciences Laboratory at the University of California, Berkeley. The NASA Marshall Space Flight Center is responsible for the grazing incidence optics, while the Astro-H team at JAXA/ISAS has provided double-sided silicon strip detectors.

FOXSI is a pathfinder for the next generation of solar hard x-ray spectroscopic imagers. Such observatories will be able to image the non-thermal electrons within the solar flare acceleration region, trace their paths through the corona, and provide essential quantitative measurements such as energy spectra, density, and energy content in accelerated electrons.

The FOXSI team sits in front of the integrated payload before it gets ready for launch (from left to right: Paul Turin, Shinya Saito, Stephen McBride, Steven Christe, Säm Krucker, Lindsay Glesener). Credit: NASA/S. Fitzpatrick 

 Previously, techniques to collect and observe the high energy x-rays streaming from the sun were hampered by the fact that x-rays at high energies cannot be focused with conventional lenses the way visible light can be. When an x-ray encounters a standard glass lens it passes through the lens completely. X-ray telescopes have therefore relied on imaging that doesn't rely on focusing. This is a very effective technique when looking at a single bright event on the sun, such as the large burst of radiation and x-rays from a solar flare, but doesn't work as well when searching for many faint events occurring simultaneously. 

The FOXSI instrument, however, makes use of new iridium-coated nickel/cobalt mirrors that do successfully cause x-rays to reflect, as long as the x-rays come in from a nearly horizontal direction. Several of these mirrors in combination help collate the x-ray light before funneling it to the detector. These focusing optics make faint events appear brighter and crisper. 

NEXEYA Systems is dedicated to the development of ground test tools: test means, space harness and structures. NEXEYA intervenes on all types of programs : civil, miltary, observation, scientific, intrumentation, etc.

• execution of full and rigorous test campaigns before launching to ensure perfect satellite operation in space (afterwards it's too late). 
• designing, making and testing "power/control-command" harnesses for the space flight and ground segment.
• management of complete projects with high responsibility as antennas, batteries, platform or payload NIDA structures, PDU equipment, deployment mechanisms, optical instruments.

BLUEsat, an acronym of Basic Low-Earth-orbit University of NSW Experimental satellite, is a digital amateur radio satellite being designed and built solely by students here at the University of NSW.

The satellite is a small cube measuring approximately 260mm on each side, excluding antennae, and weighs around 14kg. Powered by fixed solar panels on each face, it will carry a flight computer, radio transmitters and receivers, a power-control system, battery packs for when its orbit places it in the Earth's shadow, magnets to passively stabilise the satellite and align it with the Earth's magnetic field, and will be controlled via a dedicated communications groundstation here at UNSW. BLUEsat will be placed in an approximately circular orbit at an altitude of around 750km that will take it over the poles. At this altitude, the satellite will travel around the Earth at a rate of around once every 90 minutes.

BLUEsat is primarily an educational satellite, designed to give students at UNSW space experience which they could not obtain elsewhere.

The Australian Centre for Space Engineering Research (ACSER) was launched at the University of New South Wales (UNSW) in November 2010. The centre aims to assist in the Federal Government's push to increase Australia's capabilities in the space industry.

The centre will build on existing UNSW strengths of satellite navigation, earth observation, and hypersonics, and can draw on the huge expertise of Australia's largest Engineering faculty. UNSW is participating in five Australian Space Research Program (ASRP) projects.

Global Satellite Engineering (GSE) was established in 2005 to provide engineering solutions for the satellite industry.

Space Engineering (S.E.) was founded in 1989.

The Company is providing engineering services, characterised by highly technical contents and mainly dealing with satellite systems, space products and services (Antenna Systems, Test Beds, Mission Analysis, Space studies).

SintelSat is a global communications company based in Stony Brook, New York, USA, providing turnkey solutions using Satellite Communication, Fiber, Networking, Microwave Systems and Wi-Fi/ Wi-MAX Wireless technologies.

The company currently serves corporations, local & state government, federal, state, embassies, United Nation, World Bank and many enterprise customers in infrastructure rebuilding, IP connectivity, private networks, VoIP, data and video solutions in emerging markets.

SintelSat has satcom, networking, technical support and NOC capabilities in Afghanistan, Iraq, Lebanon, India, and the Philippines. Field support personnel are available on many continents including Africa, Middle East, Asia and Europe.