Publication Abstracts
McBride et al. 2024
McBride, B.A., J.V. Martins, J.D. Cieslak, R. Fernandez-Borda, A. Puthukuddy, X. Xu, N. Sienkiewicz, , and H.M.J. Barbosa, 2024: Pre-launch calibration and validation of the Airborne Hyper-Angular Rainbow Polarimeter (AirHARP) instrument. Atmos. Meas. Tech., 17, no. 19, 5709-5729, doi:10.5194/amt-17-5709-2024.
The Airborne Hyper-Angular Rainbow Polarimeter (AirHARP) is a new imaging polarimeter instrument capable of sampling a single Earth target from up to 120 viewing angles, in four spectral channels, and in three linear polarization states across a 114° field of view (FOV). AirHARP is telecentric in the image space and simultaneously images three linear polarization states with no moving parts. These two aspects of the design allow for a simple and efficient quantitative calibration. Using coefficients derived at the center of the lens and the detector flatfields, we can calibrate the entire AirHARP sensor in a variety of laboratory, field, and space environments. We show that this telecentric calibration technique yields a 1σ absolute uncertainty of 0.25% in degree of linear polarization (DOLP) in the laboratory for all channels and for pixels around the optical axis. To validate across the FOV, we compare our multi-angle reflectance and polarization data with the Research Scanning Polarimeter (RSP) over targets sampled during the NASA Aerosol Characterization from Polarimeter and Lidar (ACEPOL) campaign. We use the error-normalized difference technique to estimate how well the instruments compare relative to their error models. We find that AirHARP and the RSP reasonably agree for reflectance and DOLP within 2 standard deviations of their mutual uncertainty at 550, 670, and 870 nm and over a limited set of ocean and desert scenes. This calibration technique makes the Hyper-Angular Rainbow Polarimeter (HARP) design attractive for new spaceborne climate missions: HARP CubeSat (2020-2022), HARP2 (2024-) on the NASA Plankton, Aerosol, Cloud, ocean Ecosystem (PACE), and beyond.
Export citation: [ BibTeX ] [ RIS ]
BibTeX Citation
@article{mc01300f,
author={McBride, B. A. and Martins, J. V. and Cieslak, J. D. and Fernandez-Borda, R. and Puthukuddy, A. and Xu, X. and Sienkiewicz, N. and Cairns, B. and Barbosa, H. M. J.},
title={Pre-launch calibration and validation of the Airborne Hyper-Angular Rainbow Polarimeter (AirHARP) instrument},
year={2024},
journal={Atmospheric Measurement Techniques},
volume={17},
number={19},
pages={5709--5729},
doi={10.5194/amt-17-5709-2024},
}
[ Close ]
RIS Citation
TY - JOUR ID - mc01300f AU - McBride, B. A. AU - Martins, J. V. AU - Cieslak, J. D. AU - Fernandez-Borda, R. AU - Puthukuddy, A. AU - Xu, X. AU - Sienkiewicz, N. AU - Cairns, B. AU - Barbosa, H. M. J. PY - 2024 TI - Pre-launch calibration and validation of the Airborne Hyper-Angular Rainbow Polarimeter (AirHARP) instrument JA - Atmos. Meas. Tech. JO - Atmospheric Measurement Techniques VL - 17 IS - 19 SP - 5709 EP - 5729 DO - 10.5194/amt-17-5709-2024 ER -
[ Close ]
