Engineering topics
Hook, Simon
Publications and source records attributed to Hook, Simon.
Landsat-8 On-Orbit and Landsat-9 Pre-Launch Sensor Radiometric Characterization
Topics: Landsat 8, 9 Instrument Overview -Operational Land Imager (OLI) -Thermal Infrared Sensor (TIRS); Landsat-8 Instrument Status and On-orbit Radiometric Performance Characterization; Landsat-9 Instrument Status and Pre-launch Radiometric Performance Characterization.
Land Surface Temperature Product Validation Best Practice Protocol Version 1.0 - October, 2017
The Global Climate Observing System (GCOS) has specified the need to systematically generate andvalidate Land Surface Temperature (LST) products. This document provides recommendations on goodpractices for the validation of LST products. Internationally accepted definitions of LST, emissivity andassociated quantities are provided to ensure the compatibility across products and reference data sets. Asurvey of current validation capabilities indicates that progress is being made in terms of up-scaling and insitu measurement methods, but there is insufficient standardization with respect to performing andreporting statistically robust comparisons.Four LST validation approaches are identified: (1) Ground-based validation, which involvescomparisons with LST obtained from ground-based radiance measurements; (2) Scene-based intercomparisonof current satellite LST products with a heritage LST products; (3) Radiance-based validation,which is based on radiative transfer calculations for known atmospheric profiles and land surface emissivity;(4) Time series comparisons, which are particularly useful for detecting problems that can occur during aninstrument's life, e.g. calibration drift or unrealistic outliers due to undetected clouds. Finally, the need foran open access facility for performing LST product validation as well as accessing reference LST datasets isidentified.
The Future of Evapotranspiration: Global Requirements for Ecosystem Functioning, Carbon and Climate Feedbacks, Agricultural Management, and Water Resources
The fate of the terrestrial biosphere is highly uncertain given recent and projected changes in climate. This is especially acute for impacts associated with changes in drought frequency and intensity on the distribution and timing of water availability. The development of effective adaptation strategies for these emerging threats to food and water security are compromised by limitations in our understanding of how natural and managed ecosystems are responding to changing hydrological and climatological regimes. This information gap is exacerbated by insufficient monitoring capabilities from local to global scales. Here, we describe how evapotranspiration (ET) represents the key variable in linking ecosystem functioning, carbon and climate feedbacks, agricultural management, and water resources, and highlight both the outstanding science and applications questions and the actions, especially from a space-based perspective, necessary to advance them.
Applications of Future NASA Decadal Missions for Observing Earth's Land and Water Processes
No abstract available
Applications of Future NASA Decadal Missions for Observing Earth's Land and Water Processes
No abstract available
ECOSTRESS: ECOsystem Spaceborne Thermal Radiometer Experiment on Space Station
No abstract available
The Rim Fire in Yosemite, CA: Opportunities for the HyspIRI Prepatory Airborne Campaign
No abstract available