development schedule and capped life-cycle costs. The first two such missions, the Vegetation Canopy Lidar and the Gravity Recovery and Climate Explorer, are scheduled for launch in 2000 and 2001, respectively.
electrons per bit.
Gallium arsenide/germanium: Semiconductors used in the construction of solar arrays.
Geosat Follow-On mission.
A type of infrared array detector composed of an alloy of mercury (Hg), cadmium (Cd), and tellurium (Te).
Intercontinental ballistic missile.
A type of focal-plane array used for sensing near-infrared radiation composed of indium (In) and antimony (Sb).
Integrated product development team.
Inertial Upper Stage.
Jet Propulsion Laboratory.
Lightweight Exo-Atmospheric Projectile.
Light identification, detection, and ranging.
Lockheed Martin Launch Vehicle.
Second-generation Lockheed Martin Launch Vehicle.
SDIO experimental satellite.
NASA's third Discovery mission, a small lunar orbiter scheduled for launch in October 1997 (see Table 3.1).
The first Shuttle-launched interplanetary spacecraft. Following its launch from Atlantis in 1989, Magellan mapped almost all of Venus's surface using synthetic aperture radar and conducted measurements of the planet's gravitational field.
The first and last of NASA's Planetary Observer series. It was launched in 1992 and was lost shortly before entering orbit around Mars in 1993.
Formerly known as the Mars Environmental Survey (MESUR) Pathfinder, this spacecraft is one of the first two Discovery missions and was launched in December 1996. The mission consists of a lander and a surface rover, ''Sojourner" (see Table 3.1).
A continuing line in NASA' s budget dedicated to the launch of two small- to intermediate-sized Mars missions at every launch opportunity (every 26 months) between 1996 and 2005. The first Surveyor mission, Mars Global Surveyor, was launched in November 1996 and is expected to arrive at Mars in September 1997.
Mars Global Surveyor: The first of NASA's Mars Surveyor missions.
Mid-sized Explorer: A continuing line in NASA's budget dedicated to low-cost (<<$70 million) missions in space physics and astrophysics.
Milstar Military Star:—
A series of large military communications satellites.
Million instructions per second.
Multi-Angle Imagery Spectral Radiometer.
Miniature Seeker Technology Integration.
Near-Earth Asteroid Rendezvous: One of NASA's first two Discovery missions, it was launched in February 1996 and will rendezvous with 433 Eros in January 1999 (see Table 3.1).
Naval Research Laboratory.