ELT for VLT Developer

This section aims to help introduce developers familiar with VLT software to similar or related ELT concepts.

Table 1 Concept mapping between VLT and ELT

VLT

ELT

Comment

BOSS

OCM

The main component coordinating the exposures/Data Acquisitions. In VLT it also had a supervisory and role for which commands were forwarded through BOSS. BOSS was also a common point of customization to add new commands for e.g. slow guiding. This is not the case in ELT where direct setup is the norm and custom behaviour is implemented as separate components.

BOSS Archiver

DPM

Component responsible for creating the final Data Product and deliver it to the Archive (OLAS). In ELT DPM will also be able to deliver the final Data Product to more than one receiver, but the standard and default receiver will remain to be OLAS.

Exposure

Data Acquisition

The term has been generalized for ELT to better suit the wide range of data that can be acquired.

Expoid

Data Acquisition id

Uniquely identifies an expoure/Data Acquisition. This is a mandatory parameter in most Data Acquisition commands.