Results 21 to 30 of about 86,204 (314)
Orbiting and
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021 At NASA Goddard Space Flight Center, we have been developing spaceborne lidar instruments for space sciences. We have successfully flown several missions in the past based on mature diode pumped solid-state laser transmitters.
Anthony W. Yu +21 more
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Using the OMI aerosol index and absorption aerosol optical depth to evaluate the NASA MERRA Aerosol Reanalysis [PDF]
Atmospheric Chemistry and Physics, 2015 A radiative transfer interface has been developed to simulate the UV aerosol index (AI) from the NASA Goddard Earth Observing System version 5 (GEOS-5) aerosol assimilated fields.
V. Buchard +8 more
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Small PN-Code Lidar for Asteroid and Comet Missions—Receiver Processing and Performance Simulations
Remote Sensing, 2021 Space missions to study small solar system bodies, such as asteroids and comet cores, are enhanced by lidar that can provide global mapping and serve as navigation sensors for landing and surface sampling.
Daniel R. Cremons +3 more
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The Global Precipitation Measurement (GPM) Spacecraft Power System Design and Orbital Performance
E3S Web of Conferences, 2017 The Global Precipitation Measurement (GPM) spacecraft was jointly developed by National Aeronautics and Space Administration (NASA) and Japan Aerospace Exploration Agency (JAXA). It is a Low Earth Orbit (LEO) spacecraft launched on February 27, 2014. The
Dakermanji George +6 more
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Russian forests show strong potential for young forest growth
Communications Earth & EnvironmentClimate warming has improved conditions for boreal forest growth, yet the region’s fate as a carbon sink of aboveground biomass remains uncertain. Forest height is a powerful predictor of aboveground forest biomass, and access to spatially detailed ...
Christopher S. R. Neigh +8 more
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Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing
FEBS Letters, EarlyView.Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley +1 more source
Communications Earth & EnvironmentWe report on observed trend anomalies in climate-relevant global ocean biogeochemical properties, as derived from satellite ocean color measurements, that show a substantial decline in phytoplankton carbon concentrations following eruptions of the ...
Bryan A. Franz +3 more
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Time after time – circadian clocks through the lens of oscillator theory
FEBS Letters, EarlyView.Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo +2 more
wiley +1 more source
Storm surge and ponding explain mangrove dieback in southwest Florida following Hurricane Irma
Nature Communications, 2021 Mangroves are adapted to cope with tropical storms, but might be threatened by rising frequency and intensity of these events. Here the authors document one of the largest mangrove diebacks on record following Hurricane Irma in Florida, and show a ...
David Lagomasino +9 more
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Eos, Transactions American Geophysical Union, 1994 Wayne Littles will take over the job of Associate Administrator for Space Flight at NASA from Maj.Gen. Jeremiah W. Pearson, who has resigned from the post. Littles, now NASA's Chief Engineer, was formerly deputy director of the Marshall Space Flight Center in Huntsville, Ala.
openaire +1 more source