RHF wrote:
On Jan 22, 4:56 am, Billy Burpelson wrote:
wrote:
I think it is more like a long train (2 seconds long) on a short U
shaped track (1.25 seconds on each leg). The engine coming back will
pass the caboose still on its way to the end of the U.
An interesting and thoughtful response. However, it generates a question:

In your train analogy above, what is to keep the leading part of the
echo from being QRMed by the trailing part of the transmitted signal?

BP,

"*" In the 5 Second Time Cycle for the Two Signals; this is
the Two Periods of 'Silence' between the Earth Pulse and
the Lunar Reflection.

EP .= = = = * _ _ _ _ * 5s
LR ._ _ _ _ * -- -- -- -- * 5s

"." Start of the Time Sync for 5 Second Signal Cycle
"=" Earth Pluse Time
"_" Non-Signal Time
"--" Lunar Reflection Time

A 2 Second Earth Pulse with a 2.5 Second Lunar Reflection
Delay creates a One-Half (1/2) Second Period of Silence
between the two Signals.

~ RHF
.

Roy, I think you might still might be missing the point here. Yes, the
ROUND-TRIP delay is 2.5 seconds; one-way is ~1.25 seconds.

So, if you send a 2 second long pulse -to- the moon, it will arrive in
1.25 seconds and thus the reflected signal will start back at time 1.25
seconds; but there is still the remaining .75 second of the original
terrestrial pulse still winging its way to the moon. Thus my original
question: Will the beginning of the echo (at time 1.25 sec) QRM the last
..75 second of the original transmitted pulse still on the way?

Inquiring minds want to know...