New infrared sensor technology mirror on-ground characterization

Abigail L. Ganopol; Hugo Marraco

doi:10.1117/1.JRS.8.083522

11 November 2014 New infrared sensor technology mirror on-ground characterization

Abigail L. Ganopol, Hugo Marraco

Author Affiliations +

Journal of Applied Remote Sensing, Vol. 8, Issue 1, 083522 (November 2014). https://doi.org/10.1117/1.JRS.8.083522

Abstract

The new infrared sensor technology (NIRST) is an infrared radiometer on board the SAC-D/Aquarius mission, launched on June 10, 2011. It is composed of middle wave infrared (MWIR) and a long wave infrared (LWIR) cameras, with three arrays of 512 microbolometers each. The three MWIR camera arrays operate in the [3.4,4.2]-μm spectral range, whereas LWIR camera arrays 1 and 2 operate in the [10.4,11.3]-μm spectral range and array 3, in the [11.4,12.3]-μm spectral range. NIRST also has a pointing Be mirror that covers the range of [30 deg, 60 deg], where 45 deg corresponds to nadir pointing. The aim of this work is to present the on-ground NIRST mirror’s characterization. The characterization was performed in an ambient environment by acquiring data at three different pointing angles, β={30 deg;45 deg;60 deg}, at several blackbody sources’ temperatures for both cameras. The on-ground mirror characterization revealed that the laboratory blackbody sources used present a temperature gradient on their emitting surfaces. The results also reveal the system response to be affected by the pointing angle, i.e., the data at 60 deg was noisier that at 30 deg.

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Abigail L. Ganopol and Hugo Marraco "New infrared sensor technology mirror on-ground characterization," Journal of Applied Remote Sensing 8(1), 083522 (11 November 2014). https://doi.org/10.1117/1.JRS.8.083522

Published: 11 November 2014

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KEYWORDS

Mirrors

Cameras

Black bodies

Microbolometers

Long wavelength infrared

Infrared sensors

Mid-IR

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