Goddard High Resolution Spectrograph



The Goddard High Resolution Spectrograph (GHRS or HRS) was a spectrograph installed on the Hubble Space Telescope. It was replaced by the Near Infrared Camera and Multi-Object Spectrometer (NICMOS) in 1997.

GHRS facts

 * Instrument type: Ultraviolet spectrograph
 * Wavelength range: 1050 to 3200 Å (105 to 320 nm)
 * Resolving Power at 1200 Å (120 nm)
 * Low - 2,000 (0.6 Å or 60 pm, or a Doppler effect of 150 km/s)
 * Medium - 20,000 (0.06 Å or 6 pm, 15 km/s)
 * High - 100,000 (0.012 Å or 1.2 pm, 3 km/s)

A technical description of the construction and operation of the GHRS can be found in NASA technical report CP-2244.