Investigation Of Sodium Layer Anisotropies For Atmospheric Tip-Tilt Retrieval Using Laser Guide Stars
Abstract
This project delivered results in 2 tracks of investigation to derive tip/tilt information for improved adaptive optics performance using an event-based sensor (asynchronous-read-out CCD).1. Direct analysis of large area illumination of mesospheric sodium layer density variations.2. Time-delay differences between upward and downward propagation to and from the mesosphere.The results showed that the first method was possible but not practical due to spurious motions, but the second method was definitely workable. This is a significant result as it would greatly improve the performance of free-space optical communications systems with minimal additional cost or complexity. Future work has been proposed to test the performance of the tip-tilt sensor in conjunction with a standard, higher-order WFS both in the laboratory and on-sky. I would recommend this further study if sufficient funding can be obtained.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 08, 2024
- Accession Number
- AD1230839
Entities
People
- Noelia Martinez Rey
Organizations
- Australian National University