33
edits
Changes
Jump to navigation
Jump to search
Line 7:
Line 7: + Line 20:
Line 21: − + − +
The Field of Optical Communications (view source)
Revision as of 20:15, 22 March 2016
, 20:15, 22 March 2016→MIT Lincoln Labs LLCD/LADEE
All systems operated at or above expected levels, and it was demonstrated that an optical link could be established without human-in-the-loop interaction. Several demonstrations of the system were executed, and are described below.
All systems operated at or above expected levels, and it was demonstrated that an optical link could be established without human-in-the-loop interaction. Several demonstrations of the system were executed, and are described below.
[[File:LADEE w flare - cropped.jpg |475px|right]]
==== High Speed Telemetry ====
==== High Speed Telemetry ====
==== Ground Station Handover ====
==== Ground Station Handover ====
During testing with the LLGT, cloud cover became stronger than anticipated. With very little time delay, the link was turned off, locked onto the LLOT (one of the back-up stations), and then reactivated perfectly. This was the first demonstration of a control "Handover" and showed the systems robustness.
==== Open-Loop Optical Lock On ====
==== Open-Loop Optical Lock On ====
After lock on had become routine, LADEE was loaded with predefined instructions to turn on the LLST system. Then when LADEE next came into view, without any RF communication, the LLST system was activated and locked on to the ground.The entire windows was then operated entirely upon optical commands, and RF was never used.
=== The Ground and Space terminals (LLGT and LLST) ===
=== The Ground and Space terminals (LLGT and LLST) ===