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KeyMacro is a universal keystroke recorder for Windows operating systems, with KeyMacro, you can record keystrokes on the computer. You can also view the recorded keystrokes in a sequence or in real time. The recorded keystrokes can be saved as a log file to your computer, which allows you to know the exact steps to follow, so as to operate the computer.
This software is the best choice to track the computer usage of employees. It can record their entering/exiting their workplaces and workplace operations.
Record the usage of employees
used to record the computer usage of employees. It can record keyboard keystrokes in Windows, so as to know the exact steps that employees are using to operate the computer. The software can also record the website addresses visited, as well as the online actions of the employees. It can export the recorded logs to Excel. It can save the recorded log data in PDF format.
Useful for tracking computer usage
KeyMacro can be installed on multiple computers in your workplace. Each employee can have an account, which is used for logging. You can easily monitor the computer usage of employees with this software.
KEYMACRO Description:
KeyMacro is a universal keystroke recorder for Windows operating systems, with KeyMacro, you can record keystrokes on the computer. You can also view the recorded keystrokes in a sequence or in real time. The recorded keystrokes can be saved as a log file to your computer, which allows you to know the exact steps to follow, so as to operate the computer.
This software is the best choice to track the computer usage of employees. It can record their entering/exiting their workplaces and workplace operations.
Record the usage of employees
used to record the computer usage of employees. It can record keyboard keystrokes in Windows, so as to know the exact steps that employees are using to operate the computer. The software can also record the website addresses visited, as well as the online actions of the employees. It can export the recorded logs to Excel. It can save the recorded log data in PDF format.
Useful for tracking computer usage
KeyMacro can be installed on multiple computers in your workplace. Each employee can have an account, which is used for logging. You can easily monitor the computer usage of employees with this software.
KEYMACRO Description:
KeyMacro is a universal keystroke recorder for Windows operating systems, with KeyMacro, you can record 70238732e0

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Can the distance between the Moon and Earth be measured accurately?

From time to time I see news that the distance between the Earth and the Moon has been changed. For example:

The distance between Earth and Moon has been precisely measured to be 384,400 km.

Wikipedia says

The average distance between the two bodies is 384,400 km.

Another source says

The average distance between the two bodies is 384,400 km.

My question is, can the distance between the Moon and Earth be measured accurately?

A:

The answer is yes. In fact, it has been measured at the level of accuracy which you are interested in.
In 1969 the Lunar Laser Ranging Experiment (LLR) was launched on a rocket to determine the Earth-Moon distance to an accuracy of 1 meter.

The basic idea of LLR is to monitor the time it takes light to travel from the Earth to the Moon, then back, and compare this with the same length of time it would take light to travel from the Moon to the Earth.
The accuracy of this measurement is due to the fact that:

when the distance between the Earth and Moon is small, light from the Moon takes longer to reach the Earth,
when the distance between the Earth and Moon is large, light from the Earth takes longer to reach the Moon.

The details of LLR are explained in the paper Time lapse, or, LLR sets the course of history, by C.B. Briggs, which is available on the web.
However, the article LLR1 on Wikipedia describes the details of the experiment to an accuracy of $3.9\cdot 10^{ -4}$. The method used is similar to that proposed in the paper, but with a slightly different technique.

The article LLR2 on Wikipedia includes the results of the experiment performed in 1980-1991 and has the accuracy of $7.7\cdot 10^{ -5}$.

A:

Yes, with an accuracy of about $3.9\cdot 10^{ -4}$ for the distance between