Notice: A minor IT Maintenance and Release Window will take place between Saturday, 8 August, 2020 at 08:00 CEST/02:00 CLT and Sunday, 9 August, 2020 at 24:00 CEST/18:00 CLT. From 08:00 CEST/02:00 CLT on Saturday all ESO IT services including the User Portal, p2/p2demo, the Scientific Archive, E-mail, and internet connectivity on all ESO sites, could be subject to intermittent outages.

Full services cannot be guaranteed before Monday, 10 August, 2020.  We apologise for any inconvenience caused by this.

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