New spaceborne and airborne imaging spectrometers are being proposed and developed to derive properties of the Earth's surface from measurements of the upwelling radiance in the solar reflected spectrum.

AVIRIS Imaging Spectrometer requirements↗

NASA NTRS2000

Using Nighttime Lights to Validate the Spectral Calibration of Imaging Spectrometers

This paper proposes a new method for the in-flight validation of spectral calibration based on surface light sources that contain sharp spectral emission lines.

imaging spectroscopy AVIRIS spectral emission line↗

NASA NTRS2000

Operation Calibration Georectification and Reflectance Inversion of NASA's Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) Four- and Two-Meter Data Acquired from a Low-Altitude Platform

This paper presents key aspects of the implementation, operation, calibration, georectification, and validation of AVIRIS on a low-altitude platform in the Autumn of 1998.

AVIRIS Low Altitute Imaging Spectrometer↗

NASA NTRS2000

Exploration of the Relationship Between Information Content and Signal-to-Noise Ratio and Spatial Resolution

Explore the source record for details and available documents.

AVIRIS data calibration distribution↗

NASA NTRS1999

Pushbroom Imaging Spectrometer Design for Optimum Recovery of Spectroscopic and Spatial Information

An MTF-based optimization method is described that can extract maximum spectral and spatial uniformity of response from compact pushbroom imaging spectrometer designs.

imaging spectroscopy pushbroom imaging↗

NASA NTRS1999

Intercomparison of Laboratory Radiance Calibration Standard

Several standards for radiometric calibration were measured repeatedly with a spectroradiometer in order to understand how they compared in accuracy and stability.

calibration↗

NASA NTRS1998

Neural Network Processing for Real Time, Sub-Pixel Hyperspectral Data Extraction

The goal of many applications that using hyperspectral images is to describe the constituent components of each pixel in a scene.

Real-Time Target ID Sub-Pixel Hyperspectral Sensin↗

NASA NTRS1996

Mapping Volcanic Gas Emissions in the Mammoth Mountain Area Using Aviris

The Long Valley Caldera located in the eastern Sierra Nevada (California) shows new signs of volcanic activity. This renewed activity is expressed by gas emissions, hydro-thermal activity and frequent earthquakes.

volcanic↗

NASA NTRS1995

Recent Improvements to the Airborne Visible/Infrared Imaging Spectrometer (AVRIS)

Several improvements have been made to the Airborne Visible/Infrared Imaging Spectrometer (AVRIS) since 1994--new focal plane arrays, a new analog and digital chain and an onboard calibration lamp controlled by radiance feedback. These changes increased the signal-to- noise ratio by 2 to 3 times, eliminated noise spikes and the need for spectral sampling, and greatly reduced dark-current noise.

AVRIS improvements spectrometer↗

NASA NTRS1995

Innovative Imaging Spectrometer Calibration Techniques

A laboratory calibration of the Airborne Visible Infrared Imaging Spectrometer (AVIRIS) allowed experimentation with several innovative calibration techniques that would improve calibration accuracy, provide independent checks for systematic errors, and reduce the time required to collect a calibration data set.

remote sensing AVIRIS Airborne Visible Infrared Im↗