" Using such a pulse pattern makes the echo, which arrives back from the
moon 2.4 seconds later". From: http://www.rense.com/general79/haarp.htm

"During the experiment, which was carried out on Oct. 28 and 29, 2007, the
radar signals from HAARP were at 7.4075 MHz and 9.4075 MHz"

I do not know the distance to Moon on that days but for the mean distance
384 000 km the speed is:

384 000/2.4 = 320 000 km/s.

Speed of light is 300 000.

But long waves travel quicker in glass. Would be the same in space?
S*