Due to planned IT maintenance between Saturday, 15 May 2021 at 08:00 CEST/02:00 CLT and Sunday, 16 May 2021 at 24:00 CEST/18:00 CLT, ESO services that rely on Database Management Systems, the Scientific Archive, and Internet connectivity on all ESO sites, could be subject to intermittent outages. Full services cannot be guaranteed before Monday 17 May. We apologize for any inconvenience caused.

Service Mode Policies

The ESO Optical/Infrared Telescopes Science Operations Policies document, approved at the 154th Council meeting in June 2020, describes the policies applied to the selection of observations, the operations and the data handling of all ESO optical/near-infrared telescopes. 

The following pages list science operations policies implementation specific to service mode that have to be considered for the preparation of Phase 2 material and the execution of OBs in service mode:

Instrument selector

This page is valid for all instruments