Goddard Projects Directory

The search for R produced 5 results out of 249 records Relay I Launch Date: 12/13/1962 Successfully tested a variety of telecommunication transmission modes. Other Name(s):  Relay 1, Relay-A, A 15 |  NSSDC Link  |  Additional URL 1  |   Relay II Launch Date: 01/21/1964 Conducted a varety of on-orbit tests of wideband communication modes. Other Name(s):  Relay 2, Relay-B |  NSSDC Link  |  Additional URL 1  |   RHESSI Launch Date: 2/5/2002 The Rueven Ramaty High-Energy Solar Spectroscopic Imager's primary mission is to investigate the basic physics of particle acceleration and explosive energy release in solar flares. The RHESSI mission consists of a single spin-stabilized spacecraft in a low-altitude orbit inclined 38 degrees to the Earth's equator. The only instrument on board is an imaging spectrometer with the ability to obtain high fidelity color movies of solar flares in X rays and gamma rays. It uses two new complementary technologies: fine grids to modulate the solar radiation, and germanium detectors to measure the energy of each photon very precisely. Other Name(s):  Rueven Ramaty High-Energy Solar Spectroscopic Imager, HESSI, SMEX/RHESSI, Small Explorer/RHESSI, SMEX 6 |  GSFC Link  |  NSSDC Link  |  Additional URL 1  |  Additional URL 2  |  Image Gallery  |  Educational Resource  |   ROSAT Launch Date: 06/01/1990 Roentgen Satellite to accommodate a large X-ray telescope to study X-ray emissions from non-solar celestial objects. ROSAT, the Röntgen Satellite, was an X-ray observatory developed through a cooperative program between Germany, the United States, and the United Kingdom. The satellite was proposed by the Max-Planck-Institut für extraterrestrische Physik (MPE) and designed, built and operated in Germany. It was launched by the United States on June 1, 1990. The mission ended after almost nine years, on February 12, 1999. The U.S. ROSAT Guest Observer Facility (GOF) is located at NASA's Goddard Space Flight Center in Greenbelt, Maryland. The GOF is part of the Office of Guest Investigator Programs (OGIP) in the Laboratory for High Energy Astrophysics (LHEA). Other Name(s):  Röentgen Satellite |  GSFC Link  |  NSSDC Link  |  Additional URL 1  |  Additional URL 2  |  Image Gallery  |   RXTE Launch Date: 12/30/1995 The Rossi X-Ray Timing Explorer (RXTE) studies the temporal and broad-band spectral phenomena associated with stellar and galactic systems over timescales ranging from microseconds to years. The Rossi X-ray Timing Explorer (RXTE) is a satellite that observes the fast-moving, high-energy worlds of black holes, neutron stars, X-ray pulsars and bursts of X-rays that light up the sky and then disappear forever. RXTE was launched into low-Earth orbit on December 30, 1995, and is still going strong, making unique contributions to our understanding of these extreme objects. For RXTE, the trick to observing these kinds of objects is all in the timing -- an ability to observe changes in X-ray brightness that occur in a mere thousandths of a second, or over several years. Other Name(s):  Rossi X-Ray Timing Explorer, X-Ray Timing Explorer, Explorer 69, XTE |  GSFC Link  |  NSSDC Link  |  Additional URL 1  |  Image Gallery  |  Educational Resource  |