Solar radiation enters the Earth's atmosphere with a portion being scattered by clouds and aerosols.

Processing, archiving and distributing Earth science data
at the NASA Langley Research Center

AirMSPI Level 1B2 V006 New Data for the SPEX-PR Campaign

AirMSPI Level 1B2 V006 New Data for the SPEX-PR Campaign

Wednesday, May 16, 2018

The NASA Langley Atmospheric Science Data Center (ASDC) and Jet Propulsion Laboratory (JPL) announce the public release of Version 006 of the Airborne Multiangle SpectroPolarimetric Imager (AirMSPI) Level 1B2 data products for the SPEX engineering flights + Porter Ranch gas leak overflights (SPEX-PR) flight campaign.


AirMSPI flies in the nose of NASA's high-altitude ER-2 aircraft. The instrument was built by JPL and the University of Arizona under NASA’s Instrument Incubator and Airborne Instrument Technology Transition Programs, and is aimed primarily at remote sensing of the amounts and microphysical properties of aerosols and clouds.


AirMSPI Level 1B2 products contain radiometric and polarimetric images of clouds, aerosols, and the surface of the Earth. In particular, products contain map-projected data at 8 wavelengths: 355, 380, 445, 470, 555, 660, 865, and 935 nm. The data products include radiance, time, solar zenith, solar azimuth, view zenith, and view azimuth for all spectral bands. Wavelengths for which polarization information is available (470, 660, and 865 nm) also include the Stokes parameters Q and U, as well as degree of linear polarization (DOLP) and angle of linear polarization (AOLP). Q, U, and AOLP are reported relative to both the scattering- and view meridian planes. Files are distributed in HDF-EOS-5 format.


This release of AirMSPI data contains all targets acquired during the SPEX engineering flights + Porter Ranch gas leak overflights (SPEX-PR) flight campaign, which was based out of Armstrong Flight Research Center in Palmdale, CA. The SPEX engineering flights conducted on February 2 through February 5, 2016 focused on the checkout of another polarimeter, SPEX airborne, built by SRON Netherlands Institute for Space Research, with AirMSPI providing validation. On February 9, the ER-2 overflew the Porter Ranch, California natural gas leak with AirMSPI and the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) collecting data.


Information about these products, details about product quality, and mechanisms to access the data can be found under AirMSPI Data and Information at the ASDC website. Please check back often as new products are continuing to be added and made available for ordering.