Results 171 to 179 of about 387 (179)

NPreciSe - An Automated Satellite Precipitation Product Assessment Tool. [PDF]

open access: yesSci Data
Arulraj M   +4 more
europepmc   +1 more source

Triple collocation-based estimation of spatially correlated observation error covariance in remote sensing soil moisture data assimilation

open access: closedJournal of Applied Remote Sensing, 2018
Spatially correlated errors are typically ignored in data assimilation, thus degenerating the observation error covariance R to a diagonal matrix. We argue that a nondiagonal R carries more observation information making assimilation results more accurate.
Kai Wu, Hong Shu, Lei Nie, Zhenhang Jiao
openalex   +2 more sources

Optimal Collision Avoidance Trajectories via Direct Orthogonal Collocation for Unmanned/Remotely Piloted Aircraft Sense and Avoid Operations

AIAA Guidance, Navigation, and Control Conference, 2014
The airborne Sense and Avoid (SAA) problem is a challenging and complex optimal control problem to solve. This paper builds on the previous work by the authors, which focused on the methodology for formulating the airborne SAA problem as an optimal control problem.
Nathan E. Smith   +3 more
openaire   +1 more source

Retrieving riming in arctic mixed phase clouds from collocated remote sensing and in situ aircraft measurements during ACLOUD 

2022
<p>Ice crystal formation and growth processes in mixed-phase clouds (MPCs) are not sufficiently understood. This leads to uncertainties of atmospheric models in representing MPCs. This presentation is centered around riming, which occurs when liquid water droplets freeze onto ice crystals.
Nina Maherndl   +3 more
openaire   +1 more source

Estimation of the Errors of Remote Sensing and Hydrological Model-Based Soil Moisture Values Using Triple Collocation

2017
Only limited studies in Turkey have focused their attention on soil moisture even though it has a key role in climate, flood, drought and agricultural yield related studies. Estimation of soil moisture product obtained via merging of hydrological model- and remote sensing-based soil moisture data sets is only possible if the errors of the merged ...
openaire   +1 more source

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