21 to 30 of 47 Results
Jul 21, 2021
David Thompson, 2021, "Optimal estimation of snow and ice surface parameters from imaging spectroscopy measurements", https://doi.org/10.48577/jpl.WUC1VU, Remote Sensing of Environment, JPL Open Repository
Snow and ice melt processes are key indicators of climate change, and may be assessed with remote sensing instruments. These processes decrease the surface reflectance with unique spectral patterns due to the accumulation of liquid water and light absorbing particles (LAP), makin... |
Jul 6, 2021
David Thompson, 2021, "Spectral Fidelity of Earth's Terrestrial and Aquatic Ecosystems", https://doi.org/10.48577/jpl.IH61EA, Journal of Geophysical Research: Biogeosciences, JPL Open Repository
The Surface Biology and Geology (SBG) investigation aspires to create global maps of spectral surface reflectance and emissivity at a cadence of 16 days or better. For the first time these spectroscopic maps will have coverage to address global system-level questions about Earth'... |
Jun 30, 2021
Graeme Stephens, 2021, "The spectral nature of Earth's reflected radiation: measurement and science applications", https://doi.org/10.48577/jpl.JVHMOL, Frontiers, JPL Open Repository
Abstract: This paper introduces the aerosol, clouds, convection and precipitation (ACCP) program that is currently in the process of defining a number of measurement objectives for NASA that are to be implemented toward the end of the current decade. Since a (solar) visible-short... |
May 4, 2021
Philip Brodrick, 2021, "Generalized radiative transfer emulation for imaging spectroscopy reflectance retrievals", https://doi.org/10.48577/jpl.4RZT8Z, Remote Sensing of Environment, JPL Open Repository
Derivations of surface reflectance from observed radiance are fundamentallytied to the accuracy of the radiative transfer models used to simulate the interaction of light with the atmosphere and surface. These radiative transfer models are parameterized bya wide range of quantiti... |
Apr 12, 2021
David Thompson, 2021, "Scene Invariants for Quantifying Radiative Transfer Uncertainty", https://doi.org/10.48577/jpl.3ZZUCD, Remote Sensing of Environment, JPL Open Repository
Remote imaging spectroscopy investigations typically use Radiative Transfer Models (RTMs) to predict the measured radiance at the sensor given a specific surface and atmospheric state. Discrepancies between RTM model assumptions and physical reality can lead to subtle and systema... |
Mar 17, 2021
Bruegge, Carol J, 2021, "Radiometric cross comparison of eMAS, AirMSPI, and AVIRIS sensors over Railroad Valley", https://doi.org/10.48577/jpl.LB6FRK, TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, JPL Open Repository
Remote sensing instruments, both aircraft and on-orbit platforms, undergo extensive laboratory calibrations to determine their geometric, spectral, and radiometric responses. Further validation of the latter is frequently made using in-flight Earth observations and sensor cross c... |
Mar 4, 2021
David Thompson, 2021, "The EMIT mission information yield for mineral dust radiative forcing", https://doi.org/10.48577/jpl.SIUKQY, Remote Sensing of Environment, JPL Open Repository
The influence of mineral dust is one of the largest uncertainties in global radiative forcing. To address this challenge, NASA’s Earth Mineral dust source InvesTigation (EMIT) will map the mineralogy of Earth’s mineral dust forming regions, constraining the composition of mineral... |
Feb 18, 2021
David Thompson, 2021, "Spectroscopic Imaging of Sub-Kilometer Spatial Structure in Lower Tropospheric Water Vapor", https://doi.org/10.48577/jpl.RWBJVO, Atmospheric Measurement Techniques, JPL Open Repository
This study maps the sub-kilometer spatial structure in total column water vapor with Visible to Shortwave Infrared (VSWIR) imaging spectroscopy. We describe our inversion approach and validate its accuracy with coincident measurements by airborne imaging spectrometers and the AER... |
Nov 30, 2020
Daniel Cusworth, 2020, "Multi-satellite imaging of a gas well blowout enables quantification of total methane emissions", https://doi.org/10.48577/jpl.OBDCU4, Geophysical Research Letters, JPL Open Repository
Incidents involving loss of control of oil/gas wells can result in large but variable emissions whose impact on the global methane budget is currently unknown. On November 1, 2019, a gas well blowout was reported in the Eagle Ford Shale. By combining satellite observations at dif... |
Oct 19, 2020
David Thompson, 2020, "Global Cloud Property Models for Real Time Triage Onboard Visible-Shortwave Infrared Spectrometers", https://doi.org/10.48577/jpl.TZGGWP, Atmospheric Measurement Techniques, JPL Open Repository
New methods for optimizing data storage and transmission are required as orbital imaging spectrometers collect and downlink larger data volumes due to increases in optical efficiency and resolution. For missions investigating Earth surface reflectance, excising cloud-contaminated... |
