At its farthest distance of 6,000 km, the spacecraft will image the entire planet's disk with its ultraviolet spectrometer
These instruments - the wide- and narrow-angle cameras, ultraviolet spectrometer
, infrared interferometer spectrometer, and photopolarimeter - relied on slewing of the scan platform for accurate pointing and were capable of making simultaneous observations.
The instrument I work with is Alice, an ultraviolet spectrometer
led by principal investigator Alan Stern (Southwest Research Institute).
Messenger will look too for changes in Mercury's thin atmosphere since its first visit, using particle detectors and an ultraviolet spectrometer
The 465-kilogram (1,025-pound) spacecraft carries three cameras: an 8-centimeter-aperture (3-inch) instrument for visible and infrared imaging, an ultraviolet spectrometer
, and a 20.8-cm telescope for long-range pictures.
Known as the Orbiting and Retrievable Far and Extreme Ultraviolet Spectrometer
(ORFEUS), the instrument consists of a main telescope and three spectrometers.
The bolide-fireball combination was recorded by Galileo's SSI, PPR, and (during G) ultraviolet spectrometer
. Heated by shock energy to at least 10,000 [degrees] Kelvin and perhaps much more, the rising fireball was hotter than the Sun's photosphere.
Lunar Observer plans include an ultraviolet spectrometer
as well as ion and neutral-atom mass spectrometers for atmosphere studies.
The observations with Voyager's ultraviolet spectrometer
were the first of a nova in outburst made by the Voyager spacecraft.
However, scans of the area by the ultraviolet spectrometer
show that very few hydrogen atoms (which dissociating water molecules would generate) hover over the polar region.
Esposito of the University of Colorado in Boulder reported that the ultraviolet spectrometer
aboard the Pioneer Venus spacecraft had measured a steady drop in the amount of sulfur dioxide in the planet's cloud tops (SN: 10/1/83, p.213).