AVIRIS - Airborne Visible / Infrared Imaging Spectrometer - Concept
Follow this link to skip to the main content
NASA Jet Propulsion Laboratory California Institute of Technology
jpltransbanner  
spacer
JPL HOME
jplbanner
EARTH
jplbannervt
SOLAR SYSTEM
jplbanner
STARS & GALAXIES
jplbanner
SCIENCE & TECHNOLOGY
jplbanner
BRING THE UNIVERSE TO YOU: JPL Email News jplbanner RSS jplbanner Podcast jplbanner Video

AVIRIS -- Airborne Visible / Infrared Imaging Spectrometer
                           AVIRIS Concept
Home
Flight Status
AVIRIS
The AVIRIS Task
Concept
Instrument
Spectrum
Imaging Spectroscopy
Data Processing
The AVIRIS Team
Science & Applications
Data
2017 Quicklooks
Quicklooks
Publications
Links
Contact
 
 
 
News and Updates
 
ask us
Illustration of the AVIRIS instrument's measuring capabilities
Click image to see a larger graphic.

The AVIRIS instrument contains 224 different detectors, each with a wavelength sensitive range (also known as spectral bandwidth) of approximately 10 nanometers (nm), allowing it to cover the entire range between 380 nm and 2500 nm. When the data from each detector is plotted on a graph, it yields a complete VIS-NIR-SWIR spectrum. Comparing the resulting spectrum with those of known substances reveals information about the composition of the area being viewed by the instrument.

AVIRIS uses a scanning mirror to sweep back and forth ("whisk broom" fashion), producing 677 pixels for the 224 detectors each scan. The pixel size and swath width of the AVIRIS data depend on the altitude from which the data is collected. When collected by the ER-2 (20km above the ground) each pixel produced by the instrument covers an area approximately 20 meters diameter on the ground (with some overlap between pixels), thus yielding a ground swath about 11 kilometers wide. When collected by the Twin Otter (4km above the ground), each ground pixel is 4m square, and the swath is 2km wide.

The ground data is recorded on board the instrument along with navigation and engineering data and the readings from the AVIRIS on-board calibrator. When all of this data is processed and stored on the ground, it yields approximately 140 Megabytes (MB) for every 512 scans (or lines) of data. Each 512 line set of data is called a "scene", and corresponds to an area about 10km long on the ground.

Every time AVIRIS flies, the instrument takes several "runs" of data (also known as "flight lines"). A full AVIRIS disk can yield about 76 Gigabytes (GB) of data per day.





PRIVACY/COPYRIGHT  jplbanner  IMAGE POLICY  jplbanner   FEEDBACK
Site Manager:   Sarah Lundeen
Webmaster:   Ken Gowey
JPL Number: CL 11-2654

Last Updated: