Optimizing irradiance estimates for coastal and inland water imaging spectroscopy

Next generation orbital imaging spectrometers, with advanced global remote sensing capabilities, propose to address outstanding ocean science questions related to coastal and inland water environments. These missions require highly accurate characterization of solar irradiance in the critical 380–600 nm spectral range. However, the irradiance in this spectral region is temporally variable and difficult to measure directly, leading to considerable variance between different models. Here we optimize an irradiance estimate using data from the NASA airborne Portable Remote Imaging Spectrometer (PRISM), leveraging spectrally smooth in-scene targets. We demonstrate improved retrievals for both PRISM and the Next Generation Airborne Visible Infrared Imaging Spectrometer.

[1]  David Kohler,et al.  New approach for the radiometric calibration of spectral imaging systems. , 2004, Optics express.

[2]  R. Green,et al.  Imaging spectrometer science measurements for Terrestrial Ecology: AVIRIS and new developments , 2011, 2011 Aerospace Conference.

[3]  Wei Chen,et al.  Ocean PHILLS hyperspectral imager: design, characterization, and calibration. , 2002, Optics express.

[4]  Kelly Chance,et al.  An improved high-resolution solar reference spectrum for earth's atmosphere measurements in the ultraviolet, visible, and near infrared , 2010 .

[5]  S. Solanki,et al.  The solar spectral irradiance since 1700 , 2000 .

[6]  Michael Corson,et al.  Hyperspectral Imager for the Coastal Ocean: instrument description and first images. , 2011, Applied optics.

[7]  C. Fan,et al.  Optical Spectra of Phytoplankton Cultures for Remote Sensing Applications: Focus on Harmful Algal Blooms , 2013 .

[8]  J. Aiken,et al.  Functional links between bioenergetics and bio-optical traits of phytoplankton taxonomic groups: an overarching hypothesis with applications for ocean colour remote sensing , 2007 .

[9]  U. Benz,et al.  The EnMAP hyperspectral imager—An advanced optical payload for future applications in Earth observation programmes , 2006 .

[10]  D. Thompson,et al.  Atmospheric correction for global mapping spectroscopy: ATREM advances for the HyspIRI preparatory campaign , 2015 .

[11]  L. Wallace,et al.  AN OPTICAL AND NEAR-INFRARED (2958–9250 Å) SOLAR FLUX ATLAS , 2011 .

[12]  Robert F. Chen,et al.  Properties of the Water Column and Bottom Derived from Airborne Visible Infrared Imaging Spectrometer (AVIRIS) Data , 2001 .

[13]  M. DeLand,et al.  SOLAR SPECTRAL IRRADIANCE CHANGES DURING CYCLE 24 , 2014 .

[14]  G. Thuillier,et al.  The Solar Spectral Irradiance from 200 to 2400 nm as Measured by the SOLSPEC Spectrometer from the Atlas and Eureca Missions , 2003 .

[15]  Juan M. Fontenla,et al.  High‐resolution solar spectral irradiance from extreme ultraviolet to far infrared , 2011 .

[16]  Bo-Cai Gao,et al.  Portable Remote Imaging Spectrometer coastal ocean sensor: design, characteristics, and first flight results. , 2014, Applied optics.

[17]  Bo-Cai Gao,et al.  Development of a line-by-line-based atmosphere removal algorithm for airborne and spaceborne imaging spectrometers , 1997, Optics & Photonics.