Results 31 to 40 of about 252,409 (330)
Active Region Moss: Doppler Shifts from Hinode/EIS Observations [PDF]
, 2012 Studying the Doppler shifts and the temperature dependence of Doppler shifts in moss regions can help us understand the heating processes in the core of the active regions.
Klimchuk, James A. +2 more
core +3 more sources
Parametric Wind Velocity Vector Estimation Method for Single Doppler LIDAR Model [PDF]
, 2017 Doppler lidar (LIght Detection And Ranging) can provide accurate wind velocity vector estimates by processing the time delay and Doppler spectrum of received signals.
Fang SHANG +5 more
core +2 more sources
Remote Sensing, 2019 The Chinese Ka-band solid-state transmitter cloud radar (CR) can operate in three different work modes with different pulse widths and coherent integration and non-coherent integration numbers to meet the requirement for long-term cloud measurements. The
Liping Liu, Jiafeng Zheng
doaj +1 more source
An Algorithm Using DBSCAN to Solve the Velocity Dealiasing Problem
Advances in Meteorology, 2021 Velocity dealiasing is an essential task for correcting the radial velocity data collected by Doppler radar. To improve the accuracy of velocity dealiasing, traditional dealiasing algorithms usually set a series of empirical thresholds, combine three- or
Wei Zhao, Qinglan Li, Kuifeng Jin
doaj +1 more source
Radiative transfer effects on Doppler measurements as sources of surface effects in sunspot seismology [PDF]
, 2006 We show that the use of Doppler shifts of Zeeman sensitive spectral lines to observe wavesn in sunspots is subject to measurement specific phase shifts arising from, (i) altered height range of spectral line formation and the propagating character of p ...
Braun D. C. +7 more
core +3 more sources
A Method to Correct the Raw Doppler Observations for GNSS Velocity Determination [PDF]
, 2020 AbstractIn the application of GNSS in the velocity determination, it is often the case that some GNSS receivers give an opposite sign for the raw Doppler observations which do not correspond to the real Doppler shift. This is caused by different methods of the GNSS signal processing in different GNSS receivers.
He, K. +5 more
openaire +3 more sources
A novel post-processing algorithm for Halo Doppler lidars [PDF]
Atmospheric Measurement Techniques, 2019 Commercially available Doppler lidars have now been proven to be efficient tools for studying winds and turbulence in the planetary boundary layer. However, in many cases low signal-to-noise ratio is still a limiting factor for utilising measurements by ...
V. Vakkari +8 more
doaj +1 more source
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021 Polarimetric Doppler frequency-modulated continuous-wave weather radar produces a tremendous amount of data during the observation of atmospheric conditions.
Rita Purnamasari +3 more
doaj +1 more source
Combined vertical-velocity observations with Doppler lidar, cloud radar and wind profiler [PDF]
Atmospheric Measurement Techniques, 2015 Abstract. Case studies of combined vertical-velocity measurements of Doppler lidar, cloud radar and wind profiler are presented. The measurements were taken at the Meteorological Observatory, Lindenberg, Germany. Synergistic products are presented that are derived from the vertical-velocity measurements of the three instruments: a comprehensive ...
J. Bühl +5 more
openaire +4 more sources
Geophysical Research Letters, 2019 We investigate a significant model‐observation difference found between cloud‐base vertical velocity for continental shallow cumulus simulated using large‐eddy simulations (LES) and observed by Doppler lidar measurements over the U.S.
S. Endo +8 more
semanticscholar +1 more source