Astroclimatology

Forecasts of Observing Conditions on ESO Sites

Query graphical night reports since January 1994 at La Silla, August 1998 at Paranal.

Paranal and La Silla general information and long term statistics of various parameters relevant for observational astronomy.

on meteorology, telescope environment, atmospheric turbulence, and related topics (includes links to some other sites)

Profiling Optical Turbulence CUTE-SCIDAR at Paranal
Satellite Visibility (Iridium Flares): Exact local (summer) time of events visible from La Silla and Paranal for the next seven days.
An iridium flare, produced by the sun reflecting on the satellite solar panels, can reach -8 magnitude during a few seconds.
Sodium Laser Beacon Monitoring
El Niño Southern Oscillation, links to other sites and ongoing work.
Earthquakes - information and relevance for observing sites.
ESPAS ESO Search for Potential Astronomical Sites, with an extensive documentation on Sites Worldwide and Relevant Parameters.
Astroclimatology of Chajnantor
Anthropogenic effects on Observing Conditions: Jet Condensed Trails
Photometry: Night Sky Quality at Mauna Kea, Cerro Pachon, CTIO and IAC. The Night Sky Live at Mauna Kea and other observatories.
Seeing: Gemini Site Characterization Studies, the WHT Half Arc Second Program, CTIO Robodimm, UW/APO Monitor, Mauna Kea forecasts of Cn2 vertical profiles.