5 papers
Three-Dimensional Velocity Analysis and Particle Size Dynamics from Multi-Site RGB-Photometry of Noctilucent Clouds
Oleg S. Ugolnikov, Olga Yu. Golubeva, Egor O. Ugolnikov
A method for measuring the altitude and particle size of noctilucent clouds, based on positioning and photometry from wide-angle three-color cameras, has been developed to determin…
Noctilucent Clouds Modulated by Strong 5-day Planetary Wave in 2025: Amplitudes, Phases and Altitudes Based on Ground-Based Observations and Satellite Temperature Data
Oleg S. Ugolnikov, Ilya S. Yankovsky, Nikolay N. Pertsev +12
During the summer season of 2025, noctilucent clouds (NLC) were observed at the latitudes 55-60N from the late May until the late August. A distinct 5-day periodicity in their occu…
Multiple Scattering Effects in Noctilucent Clouds: Numerical Estimation and Application to Altitude and Particle Size Measurements
Oleg S. Ugolnikov
The simple 3-D radiative transfer model in the atmosphere of the Earth is built for numerical comparison of direct solar radiation and limb scattering background at the definite la…
Winter Noctilucent Clouds Following Sudden Stratospheric Warming: First Observations
Oleg S. Ugolnikov
Mesospheric structures identical to summer noctilucent clouds were observed during the nights of December 17-19, 2024 in Siberian Russia. Basing on the available photo data, the me…
Five-years Altitude Statistics of Noctilucent Clouds Based on Multi-Site Wide-Field Camera Survey
Oleg S. Ugolnikov, Nikolay N. Pertsev, Vladimir I. Perminov +14
The results of simultaneous measurements of noctilucent clouds (NLC) position in a number of ground-based locations are presented. Observational data of 14 bright NLC events over 5…