Results 31 to 40 of about 6,136,424 (429)

Augmenting the Standard Operating Procedures of Health and Air Quality Stakeholders With NASA Resources

GeoHealth, 2021
The combination of air quality (AQ) data from satellites and low‐cost sensor systems, along with output from AQ models, have the potential to augment high‐quality, regulatory‐grade data in countries with in situ monitoring networks and provide much ...
Bryan N. Duncan, Carl A. Malings, K. Emma Knowland, Daniel C. Anderson, Ana I. Prados, Christoph A. Keller, Kevin R. Cromar, Steven Pawson, Holli Ensz   +8 more
doaj   +1 more source

EO-1 Data Quality and Sensor Stability with Changing Orbital Precession at the End of a 16 Year Mission

Remote Sensing, 2017
The Earth Observing One (EO-1) satellite has completed 16 years of Earth observations in early 2017. What started as a technology mission to test various new advancements turned into a science and application mission that extended many years beyond the ...
Shannon Franks, Christopher S. R. Neigh, Petya K. Campbell, Guoqing Sun, Tian Yao, Qingyuan Zhang, Karl F. Huemmrich, Elizabeth M. Middleton, Stephen G. Ungar, Stuart W. Frye   +9 more
doaj   +1 more source

ICESat‐2 Precision Orbit Determination

Earth and Space Science, 2021
The ICESat‐2 Precision Orbit Determination (POD) system computes the precise position of the laser altimeter instrument in inertial space, a measurement necessary for accurate geolocation of individual photon surface returns.
T. C. Thomas, S. B. Luthcke, T. A. Pennington, J. B. Nicholas, D. D. Rowlands   +4 more
doaj   +1 more source

Orbiting and In-Situ Lidars for Earth and Planetary Applications

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, Elisavet Troupaki, Steven X. Li, D. Barry Coyle, Paul Stysley, Kenji Numata, Molly E. Fahey, Mark A. Stephen, Jeffrey R. Chen, Guangning Yang, Frankie Micalizzi, Scott A. Merritt, Robert Lafon, Stewart Wu, Aaron Yevick, Hua Jiao, Demetrios Poulios, Matthew Mullin, Ying Xin Bai, Jane Lee, Oleg Konoplev, Aleksey Vasilyev   +21 more
doaj   +1 more source

Analyses of Flight Time During Solar Proton Events and Solar Flares [PDF]

arXiv, 2022
Analyzing the effects of space weather on aviation is a new and developing topic. It has been commonly accepted that the flight time of the polar flights may increase during solar proton events because the flights have to change their route to avoid the high-energy particles.
arxiv  

Long-Term Trends in Phytoplankton Chlorophyll a and Size Structure in the Benguela Upwelling System [PDF]

, 2019
This is the final version. Available from American Geophysical Union (AGU) via the DOI in this record.The Benguela Upwelling System (BUS) is among the most productive ecosystems globally, supporting numerous fisheries and ecosystem services in Southern ...
Brewin R. J. W., Brown P. C., IOCCG, IPCC, Muller‐Karger F. E., NASA Goddard Space Flight Center, NASA Goddard Space Flight Center, Probyn T. A., R Core Team, Wang Y.   +9 more
core   +1 more source

In-Space Manufacturing at NASA Marshall Space Flight Center: A Portfolio of Fabrication and Recycling Technology Development for the International Space Station

2018 AIAA SPACE and Astronautics Forum and Exposition, 2018
The in-space manufacturing project at NASA Marshall Space Flight Center seeks to mature the manufacturing capabilities which will be needed on long duration, long endurance human spaceflight missions.
T. Prater, Mary J. Werkheiser, F. Ledbetter, Kristin Morgan   +3 more
semanticscholar   +1 more source

Near-space flight of a correlated photon system [PDF]

Scientific Reports, 2014
We report the successful test flight of a device for generating and monitoring correlated photon pairs under near-space conditions up to 35.5 km altitude.
Zhongkan Tang, R. Chandrasekara, Yau Yong Sean, Cliff Cheng, C. Wildfeuer, A. Ling   +5 more
semanticscholar   +1 more source

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, A. M. da Silva, P. R. Colarco, A. Darmenov, C. A. Randles, R. Govindaraju, O. Torres, J. Campbell, R. Spurr   +8 more
doaj   +1 more source

Radiation Analysis for Moon and Mars Missions [PDF]

International Journal of Astrophysics and Space Science, Volume 8, Issue 3, September 2020, Pages: 16-26, 2018
This paper provides an overview of the radiation aspects of manned space flight to Moon and Mars. The expected ionizing radiation dose for an astronaut is assessed along the Apollo 11 flight path to the Moon. With the two dose values, the expected and the measured total dose, the radiation shielding and the activity of the Sun are estimated.
arxiv   +1 more source