Concept information
Preferred term
AIS
Definition
- The Arizona Imager/Spectrograph (AIS) consisted of five grating spectrographs (with 9 channels) and 12 imagers packaged together for observations at ultraviolet, visible, and infrared wavelengths. The AIS is a unique combination of spectrographs and imagers designed to measure the entire spectrum from 115 to 1100 nm with a spectral resolution range between 0.2 and 0.8 nm to resolve rotational lines in most vibrational bands. The coaligned imagers provided spatial images of a few prominent spectral features at selected wavelengths. Spectra and images of short-lived or rapidly changing events were obtained simultaneously. The use of two dimensional intensified CCDs as focal-plane detectors resulted in a state-of-the-art, highly miniaturized instrument capable of spectral and spatial mapping of targets. Although it was designed for specific scientific objectives (e.g., the study of shuttle glow), its versatility allowed the AIS to be used for numerous other experiments such as studies of airglow or aurora. Small changes, such as modifications to foreoptics and the replacement of interference filters, could allow the design to be used in any number of applications. The experimental objective of the AIS was the multispectral and radiometric measurements of: (1) orbiter plumes, (2) Earth limb, (3) chemical release, (4) orbiter environment, (5) gas release, and (6) calibration sources. The AIS experiment was unique and succeeded in meeting its objectives even though the full potential of the experiment was not fully realized. A review of the science data resulted in the identification of about 40 sequences in which good data were recorded on a variety of subjects. (en)
Broader concept
URI
https://gcmd.earthdata.nasa.gov/kms/concept/97038277-b048-40fd-ab36-8bb04a92adf0
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