ESAR standard and advanced users are guaranteed a specified number of L1 products per collection, per day (20 for standard users and 30 for advanced users), known as the quality of service (QoS). Once they have exceeded their QoS, they may continue to submit requests. The system will accept the requests if the system load is currently low (i.e. if no other users have outstanding requests) and will reject them if the system load is high (i.e. if other users, who have not exceeded their QoS, have pending requests). The aim is to allow users to download as much data as they need, as long as this does not interfere with other users.

ALOS standard users are given a quota of 20 products per day.

TPM standard users are given a daily quota depending on the data set.

Users having special needs can ask for a temporary quota increase by raising a request through the ESA Earth Observation User Services Portal.