The MAESTRO instrument began regular operations on 21st February 2004 and is currently in operation, recording sunrise and sunset occultations.

An interactive occultation tool provided here can be used to determine locations and maps of occultations. As an example, the number of occultations and their locations for one day (2019-06-01) are presented in the figure below.

The SCISAT data can be accessed here. The MAESTRO data can be accessed freely however to access the FTS data a username and password is required.

The latest data analysis version for MAESTRO is V4.5.

One of the problems that still exists with the MAESTRO data analysis is the lack of accurate time stamps on the measurements relative to the ACE-FTS instrument. The cause of this problem is attributed to the variability in the interrupt latency in the satellite bus computer. Therefore, a time correction is introduced to calculate the accurate tangent heights for the MAESTRO data. This time correction is obtained by comparing derived atmospheric profile data products between MAESTRO and ACE-FTS.