<title>Hyperspectral imaging Fourier transform spectrometers for astronomical and remote sensing observations</title>

Abstract

The Honda Institute ofTechnology and the Phillips Laboratory have developed several advanced visible (0.4 -0.8 pnn)Irg Fourier Transform Spectrometer (IFTS) brassboards, which simultaneously acquire one spatial and one spectral dimension of the hyperspectral image cube. The initial versions of these instruments may be scanned across a scene or configured with a scan mirror to pick up the second spatial dimension of the image cube. The current visible hyperspectral imagers posses a combination offeatures, including (i) low to moderate spectral resolution for hundreds/thousands of spectral channels, (ii) robust design, with no moving parts, (hi) detector limited free spectral range, (iv) detector-limited spatial and spectral resolution, and (v) field widened operation.The utility ofthis type ofinstrument reaches its logical conclusion howev with an instmment designed to acquire all three dimensions ofthe hyperspectral image cube (both spatial and one spectral) simultaneously. In this paper we present the (i) detailed optical system designs for the brassboard instruments (ii) the orrem data acquisistion system, (üi) data reduction and analysis techniques unique to hyperspectral sensor systems which operate with photometric accuracy, and (iv) several methods to modify the basic instrument design to allow simultaneous acquistion ofthe entire hyperspectral image cube.The hyperspectral sensor systems which are being developed and whose utility is being pioneered by florida Tech and the Phillips Laboratory are applicable to numerous DoD and civil applications including (1) space object identification, (ii) radiometrically correct satellite image and spectral signature database observations (iii) simultaneous spatiaYspectral observations ofbooster plumes for stratigic and surrogate tactical misile signature identification, and (iv) spatial/spectral visible and infrared astronomical observations with photometric accuracy.

Global estimates of lunar iron and titanium contents from the Chang' E‐1 IIM data

“…Once sampled and corrected for nonuniformities in response to the detector array elements, data processing is the same as the Michelson FTS [ Griffiths and de Haseth , 1986]. Since Okamoto et al [1984], several different variants of spatial interferometer spectrometers have been produced, principally for remote sensing [e.g., Smith and Schempp , 1991; Rafert et al , 1994; Smith and Hammer , 1996; Minnett and Sellar , 2005; Lucey et al , 2007, 2008], including one that flew in space and collected data in the visible portion of the spectrum [ Yarbrough et al , 2002]. IIM is the first planetary application of this technology.…”

Recent Advances in Counterfeit Art, Document, Photo, Hologram, and Currency Detection Using Hyperspectral Imaging

“…In remote sensing, it is used for geological exploration and soil characterization from a distance [ 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 ]. HSI paired with its remote sensing capability is often used in the field of astronomy for astronomic observation and space surveillance purposes [ 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 , 89 , 90 ]. In addition to these, environmental applications such as drought stress measurement, pollution detection, water resource analysis, space science, and vegetation monitoring also prove HSI’s reliability [ 91 , 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 , 100 , 101 , 102 , 103 , 104 ].…”

Static dual-channel polarization imaging spectrometer for simultaneous acquisition of inphase and antiphase interference images

“…Namely, two axes of the image correspond to distance and the third one to wavelength. Fourier-transform imaging spectrometers (FTISs) are powerful instruments used in the field of imaging spectroscopy and have wide application in environmental monitoring [2], atmospheric measurement [3][4][5][6], observations of distant objects [7][8][9] and biomedical field [10][11][12][13]. However, the raw datacube acquired by the FTISs consists of the interferogram in 1D and the spatial image in 2D [14][15][16][17][18].…”