The Airborne Multiangle SpectroPolarimetric Imager (AirMSPI): A new tool for aerosol and cloud remote sensing

D. J. Diner, F. Xu, M. J. Garay, J. V. Martonchik, B. E. Rheingans, S. Geier, A. Davis, B. R. Hancock, V. M. Jovanovic, M. A. Bull, K. Capraro, Russell A Chipman, Stephen C Mcclain

Research output: Contribution to journalArticle

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Abstract

The Airborne Multiangle SpectroPolarimetric Imager (AirMSPI) is an eight-band (355, 380, 445, 470, 555, 660, 865, 935 nm) pushbroom camera, measuring polarization in the 470, 660, and 865 nm bands, mounted on a gimbal to acquire multiangular observations over a ±67 along-track range. The instrument has been flying aboard the NASA ER-2 high altitude aircraft since October 2010. AirMSPI employs a photoelastic modulator-based polarimetric imaging technique to enable accurate measurements of the degree and angle of linear polarization in addition to spectral intensity. A description of the AirMSPI instrument and ground data processing approach is presented. Example images of clear, hazy, and cloudy scenes over the Pacific Ocean and California land targets obtained during flights between 2010 and 2012 are shown, and quantitative interpretations of the data using vector radiative transfer theory and scene models are provided to highlight the instrument's capabilities for determining aerosol and cloud microphysical properties and cloud 3-D spatial distributions. Sensitivity to parameters such as aerosol particle size distribution, ocean surface wind speed and direction, cloud-top and cloud-base height, and cloud droplet size is discussed. AirMSPI represents a major step toward realization of the type of imaging polarimeter envisioned to fly on NASA's Aerosol-Cloud-Ecosystem (ACE) mission in the next decade.

Original languageEnglish (US)
Pages (from-to)2007-2025
Number of pages19
JournalAtmospheric Measurement Techniques
Volume6
Issue number8
DOIs
StatePublished - 2013

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aerosol
remote sensing
polarization
volcanic cloud
cloud droplet
surface wind
wind direction
radiative transfer
sea surface
aircraft
wind velocity
flight
particle size
spatial distribution
ecosystem
ocean
land
measuring
parameter

ASJC Scopus subject areas

  • Atmospheric Science

Cite this

The Airborne Multiangle SpectroPolarimetric Imager (AirMSPI) : A new tool for aerosol and cloud remote sensing. / Diner, D. J.; Xu, F.; Garay, M. J.; Martonchik, J. V.; Rheingans, B. E.; Geier, S.; Davis, A.; Hancock, B. R.; Jovanovic, V. M.; Bull, M. A.; Capraro, K.; Chipman, Russell A; Mcclain, Stephen C.

In: Atmospheric Measurement Techniques, Vol. 6, No. 8, 2013, p. 2007-2025.

Research output: Contribution to journalArticle

Diner, DJ, Xu, F, Garay, MJ, Martonchik, JV, Rheingans, BE, Geier, S, Davis, A, Hancock, BR, Jovanovic, VM, Bull, MA, Capraro, K, Chipman, RA & Mcclain, SC 2013, 'The Airborne Multiangle SpectroPolarimetric Imager (AirMSPI): A new tool for aerosol and cloud remote sensing', Atmospheric Measurement Techniques, vol. 6, no. 8, pp. 2007-2025. https://doi.org/10.5194/amt-6-2007-2013
Diner, D. J. ; Xu, F. ; Garay, M. J. ; Martonchik, J. V. ; Rheingans, B. E. ; Geier, S. ; Davis, A. ; Hancock, B. R. ; Jovanovic, V. M. ; Bull, M. A. ; Capraro, K. ; Chipman, Russell A ; Mcclain, Stephen C. / The Airborne Multiangle SpectroPolarimetric Imager (AirMSPI) : A new tool for aerosol and cloud remote sensing. In: Atmospheric Measurement Techniques. 2013 ; Vol. 6, No. 8. pp. 2007-2025.
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