&lt;title&gt;MightySat II.1 Fourier-transform hyperspectral imager payload performance&lt;/title&gt;

Otten, Leonard John; Sellar, R. Glenn; Rafert, Bruce

doi:10.1117/12.228602

Cited by 12 publications

(4 citation statements)

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“…The Fourier Transform Hyperspectral Imager (FTHSI) was the first spaceborne imaging interferometer that operated on board of the AirForce Research Laboratory (AFRL) -U. S. Department of Defence (DoD) technological satellite MightySat II.1 (Sindri P99-1) after its launch in 2000 [4,7]. Precursors of the FTHSI were the HyperCam and the IrCam developed by the Kestrel Corporation (USA) for airborne applications, the Spatially Modulated Fourier Transform Spectrometer (SMIFTS) developed by Hawaii University [5], the High Ètendue Imaging Fourier Transform Spectrometer (HEIFTS) by Science Application International Corporation (USA) [8], and the imaging interferometer developed by Applied Spectral Imaging (Israel) for laboratory applications [6].…”

Section: Introductionmentioning

confidence: 99%

Theoretical aspects of Fourier Transform Spectrometry and common path triangular interferometers

Barducci¹,

Guzzi²,

Lastri³

et al. 2010

Opt. Express

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Recent investigations have induced relevant advancements of imaging interferometry, which is becoming a viable option for Earth remote sensing. Various research programs have chosen the Sagnac configuration for new imaging interferometers. Due to the growing diffusion of this technique, we have developed a self-contained theory for describing the signal produced by triangular FTSs and its optimal processing. We investigate the relevant disadvantages of multiplexing, and compare dispersive with FTS instruments. The paper addresses some methods for correcting the phase error, and the non-unitary transformation performed by a Sagnac interferometer. The effect of noise on spectral estimations is discussed.

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Section: Introductionmentioning

confidence: 99%

Theoretical aspects of Fourier Transform Spectrometry and common path triangular interferometers

Barducci¹,

Guzzi²,

Lastri³

et al. 2010

Opt. Express

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“…In general, the SMIFTS consists of a fore optics system, a slit, an interferometer, a Fourier optics, a cylindrical lens and the detector [3] . The object's radiation is converged by the fore optics system, then travels through the slit to the interferometer where the slit's image is cut into two virtual images, then travels trough the Fourier optics to the cylindrical lens, and ends to the detector by two beams with optical path difference.…”

Section: Smifts Introductionmentioning

confidence: 99%

“…During the end of 1980s and the beginning of 1990s, along with the development of the aerospace remote sensing technology and the CCD manufacturing technology, spatially modulated imaging Fourier Transform spectroscopy emerged and sprung up [1][2][3][4][5][6] . Because of its advantages of acquiring two dimensional spatially information and one dimensional spectra information simultaneously, high throughput utilization ratio, high signal-noise ratio, and so forth, this kind of technology soon became a developing focus.…”

Section: Introductionmentioning

confidence: 99%

Effect of Platform Attitude Stability on Image Quality of Spatially Modulated Imaging Fourier Transform Spectrometer

Jing

Wei

Yuan

2010

2010 Third International Symposium on Information Science and Engineering

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The data acquired by the spatially modulated imaging Fourier Transform spectrometer(SMIFTS) contain one dimensional spatial information, one dimensional interference information, and one dimensional pushbroom scanning spatial information. This kind of spectrometer theoretically requires that flying platform keeps uniform moving velocity and steady attitude in the imaging mode, as well as the imaging motion in each two neighboring interferograms is one array of pixels. The unsteadiness of platform would not only cause problems such as distortion, mixed pixels and lower signal-noise ratio on acquired spatial images, but also produce deviation and decadence of interferograms away from ideal ones, bringing the distortion of real spectra. The abnormal image motion model between satellite attitude and the data acquired by SMIFTS is built based on the theory that projection center of a sensor, an image point and an object on the ground are in the same line. This paper calculates the image motions between different frames, assuming that the pitch angle and yaw angle are same, And moreover, analyzes the effect of the attitude steadiness on the data quality of SMIFTS. The results show that, pitch angle bringing distortion of neighboring interferograms in alongorbit directions has most serious effect, the image gradient decrease obviouly and the discrepancy between interferogram and spectra is bigger; yaw angle bringing the relative rotation of neighboring interferograms has the less serious effect on images and spectra. To get the real spectra of the object, we should take some measures to correct it.

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“…These devices don't use any moving part to scan the instrument field-of-view (FOV). The launch of the first Fourier Transform HyperSpectral Imager (FTHSI) on board of U.S. Air Force Research Laboratory technological satellite MightySat II.1 has been an attempt to overcome the main drawbacks that limit the use of push-broom and whisk-broom imaging spectrometers for environment investigation [7][8][9] . In the FTHSI instrument the complete interferogram of a fixed scene pixel is obtained by means of a cylindrical lens which spreads out the physical information on one axis of the detector array.…”

Section: Introductionmentioning

confidence: 99%

A new stationary imaging interferometer: first results

Barducci

Casini

Castagnoli

et al. 2004

Imaging Spectrometry IX

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In this paper we present some laboratory measurements obtained by a new imaging interferometer. This instrument has been derived from the so called "stationary interferometers", which do not employ any moving part to optically scan the instrument field-of-view. The device acquires the image of an object superimposed to a fixed (stationary) pattern of autocorrelation functions of the energy coming from each pixel. The interference pattern, constituted by a system of vertical fringes, is scanned by moving the observed target with respect to the imaging device. In order to calibrate the optical-path-difference axis of the raw interferograms, we have executed a set of measurements employing an He-Ne laser source spread by a pair of planar diffusers. The dependence of the optical-path-difference values on the source spectral content has been addressed performing a set of measurements after filtering a 600W halogen lamp with interference filters of 10nm bandwidth. We have described the procedure of pre-processing of the acquired data to retrieve the spectrum of at-sensor radiance (dark signal subtraction, spectral instrument response compensation, effects of vignetting and Fourier transform algorithm). Some hints are given about the use of this instrument from airborne platforms for remote sensing of the Earth

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<title>MightySat II.1 Fourier-transform hyperspectral imager payload performance</title>

Cited by 12 publications

References 0 publications

Theoretical aspects of Fourier Transform Spectrometry and common path triangular interferometers

Theoretical aspects of Fourier Transform Spectrometry and common path triangular interferometers

Effect of Platform Attitude Stability on Image Quality of Spatially Modulated Imaging Fourier Transform Spectrometer

A new stationary imaging interferometer: first results

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