Current Display
Sun/Moon Altitude
Streetlight Altitude
0.0°
Preserve current view
Details
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About this App
Halo Atlas is an interactive atmospheric halo simulation viewer. Explore a variety of simulated ice
crystal halo displays with real-time light source altitude control (0° – 90°), seven projection modes
(Rectilinear, Stereographic, Equidistant, Equal Area, Orthographic, Globe, and Globe — Transparent),
and side-by-side A/B display comparison. Each display includes interactive 3D ice crystal models, halo
identification labels, and shareable URLs with poster generation.
Development & Collaboration
The web app is developed by JIA Hao. Codes for 3D crystal model generation are ported from ZHANG
Jiajie's IceHaloSim program (see Acknowledgements section). Labeling of the halos are assisted by
members from the Chinese halo enthusiast community.
Acknowledgements
Simulation Images
The simulation images are generated with IceHaloSim, an ice crystal halo simulation program by Zhang
Jiajie.
LoveDaisy/ice_halo_sim
Simulation Detail Photos
Photos are provided by various authors and used with permission for presentation by Halo Atlas. Unless
separately stated, reuse or redistribution is not permitted.
Halo Details
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Crystal Details
Shape
Orientation
C-axis Tilt
C-axis Rotation