Aurora is the result of the interaction between precipitating energetic electrons and protons
with the upper atmosphere. Viewed from space, it generally occurs in continuous and diffuse …

Optical structures located equatorward of the main auroral oval often exhibit different
morphologies and dynamics than structures at higher latitudes. In some cases, questions …

To address the problem of forecasting solar irradiance for grid operators, the aim of this work
is to automatically predict solar irradiance several minutes in advance. This work presents a …

In this work, we propose a system to track the clouds and predict relevant events based on
all-sky images. To deal with the nature of variable appearance of clouds, we use clusters of …

Cloud detection is important for providing necessary information such as cloud cover in
many applications. Existing cloud detection methods include red-to-blue ratio thresholding …

This paper proposes an accurate short-term solar irradiance prediction scheme via support
vector regression. Utilizing clearness index conversion and appropriate features, the support …

The threshold method is commonly used to determine cloud in a sky image. This paper
evaluates the method by numerical simulation and shows that the aerosol optical depth …

This work performs cloud classification on all-sky images. To deal with mixed cloud types in
one image, we propose performing block division and block-based classification. In addition …

This paper proposes a framework to automatically conduct cloud classification on all-sky
images and perform short-term solar irradiance prediction according to the classification …

We focused on propagating wave‐like structures which frequently appeared in the OI 630.0
nm airglow images obtained by an all‐sky imager installed at Poker Flat Research Range …