A feasibility design study was undertaken to assess the requirements of a mid-infrared echelle spectrograph (MIRES) with a resolving power of 120,000 and its associated mid-infrared adaptive optics (MIRAO) system on the Thirty-Meter Telescope. Our baseline design incorporates a 2Kx2K Si:As array or array mosaic for the spectrograph and a 1Kx1K Si:As array for the slit viewer. Various tradeoffs ...

We report on the development and characterization of the new compact infrared heterodyne receiver, iChips (Infrared Compact Heterodyne Instrument for Planetary Science). It is specially designed for ground-based observations of the terrestrial atmosphere in the mid-infrared wavelength region. Mid-infrared room temperature quantum cascade lasers are implemented into a heterodyne system for the f...

Uncooled array detectors offer a number of advantages for space borne infrared array imaging. The elimination of detector cooling requirements can significantly reduce the size, cost and power requirements systems. Integration of the instrument to a spacecraft is much simplified due to reduced thermal management requirements. An array of detectors permits imaging without mechanical scanning. In...

Two independent ground-based passive remote sensing methods are used to retrieve lower-tropospheric temperature and humidity profiles in clear-sky cases. A simulation study for two distinctly different climatic zones is performed to evaluate the accuracies of a standard microwave profiler [humidity and temperature profiler (HATPRO)] and an infrared spectrometer [Atmospheric Emitted Radiance Int...

[1] The Visible Infrared Imaging Radiometer Suite (VIIRS) sensor was launched 28 October 2011 on the Suomi National Polar-orbiting Partnership (SNPP) satellite. VIIRS has 22 spectral bands covering the spectrum between 0.412μm and 12.01μm, including 16 moderate resolution bands (M-bands) with a nominal spatial resolution of 750m at nadir, five imaging resolution bands (I-bands) with a nominal s...

In this work an-image based photoplethysmography (PPG) system is developed and tested against a conventional fingerbased system as commonly used in clinical practise. A PPG is essentially an optical instrument consisting of a near infrared (NIR) source and detector that is capable of tracking blood flow changes in body tissue. When used with a number of wavelengths in the NIR band blood oxygena...

Introduction: The linear mixing of thermal infrared (TIR) emission spectra in multi-mineralic mixtures has been proven, and its limits and applicability have been quantitatively investigated [1,2]. Limiting factors in the accuracy of any linear retrieval (spectral deconvolution) algorithm include the spectral precision of the instrumentation as well as the fact that the number of end-members mu...