Table 7
Overview of analyzed and expected sources of error in mechanical pointing errors.
| Pointing errors | Analyzed | Uncorr. | Corrected | Type of compensation | Sect. |
|---|---|---|---|---|---|
| [″] | [″] | ||||
| Gravity | Yes | 100 | 1 | LUT/CL | 5.3, 5.4.3 |
| Wind (3.5 m/s) | Yes | 0.5 | 0.2 | CL | 5.3, 5.4.3 |
| Wind (9 m/s) | Yes | 3 | 1.5 | CL | 5.3, 5.4.3 |
| Thermal (night) | Yes | 5 | 0.5 | CL | 5.3, 5.4.3 |
| Thermal (day) | Yes | 5 | 1 | CL | 5.3, 5.4.3 |
Notes. While it is anticipated that the LUT approach will be sufficient to correct gravitational deformations, we include “CL” for them since the closed-loop system will be available to correct residual surface errors not amenable to the LUT approach. Abbreviations are as in Table 6. We note that the anticipated corrections are based on expectations and requirements and may evolve as the concept evolves to a construction-ready design.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.