Passive Millimeter-Wave Dual-Polarization Imagers

Author

Liao, Shaolin ; Gopalsami, Nachappa ; Elmer, Thomas W. ; Koehl, Eugene R. ; Heifetz, Alexander ; Avers, Keenan ; Dieckman, Eric ; Raptis, Apostolos C.

Author_Institution

Argonne Nat. Lab., Argonne, IL, USA

Volume

61

Issue

7

fYear

2012

fDate

7/1/2012 12:00:00 AM

Firstpage

2042

Lastpage

2050

Abstract

We have developed two passive millimeter-wave imagers for terrestrial remote sensing: one is an integrated imaging and spectroscopy system in the 146-154-GHz range with 16 channels of 500-MHz bandwidth each, and the other is a single-channel dual-polarized imaging radiometer in the 70-100-GHz range. The imaging in both systems is implemented through translation of a 15-cm Gaussian dielectric imaging lens. We compared the outdoor images of objects such as car, vegetation, sky, and ground by both the systems under various weather conditions, including clear, cloudy, and rainy times. A ray-tracing simulation with radiative transfer equation was used to quantify the polarization diversity of the acquired images.

Keywords

clouds; electromagnetic wave polarisation; geophysical image processing; lenses; millimetre wave imaging; radiative transfer; radiometers; rain; remote sensing; Gaussian dielectric imaging lens; bandwidth 500 MHz; clear weather conditions; cloudy weather conditions; frequency 146 GHz to 154 GHz; frequency 70 GHz to 100 GHz; imaging system; outdoor object images; passive millimeter wave dual-polarization imagers; polarization diversity; radiative transfer equation; rainy conditions; ray tracing simulation; single-channel dual-polarized imaging radiometer; spectroscopy system; terrestrial remote sensing; Bandwidth; Computer architecture; Imaging; Lenses; Meteorology; Radiometry; Ray tracing; Imaging; millimeter-wave (mmW); polarization; radiometer;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2012.2183032

Filename

6146426