On Sun, Nov 26, 2023 at 04:13 PM, Steve Preston wrote:
The major challenge is measuring the delay between the start of exposure at the camera and the time the capture software requests the system time (to generate the actual timestamp).? This delay varies based on several factors which are not in your control:? the camera firmware, the camera configuration, the camera device driver, all other windows device drivers, and all windows subsystems.? The greatest risk is probably Windows.? Windows is constantly firing off various automated processes which may, or may not, impact the delay factor mentioned above.? In addition, the overall behavior and timing profile of Windows can change with every Windows update.?
Steve, there is no latency with this system, it's 100% digital and the offset is adjusted after recording, that's precisely the major challenge. On the graph that I posted you see the tracking over a whole day with one or two interruptions on my part from the GPS, we notice the precision of +/- 1ms. In addition, this graph was made under the clouds and indoors, which disadvantages the signal but is still precise.
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