Glossary of Terms


ADC Atmospheric Dispersion Corrector
ANSI American National Standards Institute
AO Adaptive Optics
ASME American Society of Mechanical Engineers International
ATA Air Transport Association
CARA California Association for Research in Astronomy
CENELEC European Committee for Electrotechnical Standardization
CFR Code of Federal Regulations
dBA Sound level in decibels, measured using the A contour frequency weighting network
DCS Drive and Control System
EIA Electronic Industries Alliance
EMI Electro Magnetic Interference
FOV Field Of View
FWHM Full Width at Half Maximum. The width across an optical beam profile where its intensity drops to half of its peak, or maximum, value. Unless otherwise indicated the beam is assumed to be symmetric about the optical axis
IBC International Building Code
ICC International Code Council
IEEE Institute of Electrical and Electronics Engineers
KSD Keck Software Document
LRIS Low Resolution Imaging Spectrograph
MTBF Mean Time Between Failures
NEBS Network Equipment Building System
NEMA National Electric Manufacturers Association
OSHA Occupational Safety and Health Administration
SSC Science Steering Committee
RT4 Rail Transport position 4, (Nasmyth deck, Keck I)
TBD To Be Determined
UL Underwriters Laboratories Inc.
USGS United States Geological Survey
WMKO W.M. Keck Observatory