If someone were to transmit short wave "Skywave" from the equator in the UTC+0 timezone (Greenwich Time) with vertical polarization, and the receiver is at the equator ~10000km away in the UTC-6 timezone (Galapagos Time), given enough transmission power, what would be the polarization of the received signal?

Assuming that the magnetic and gravitational field strength are consistent in all locations along the path of travel and that the reflections off of the surface of the earth do not affect the polarization. Also assuming that the transmitter and receiver are both at sea level, and that the reflections off of earths surface are all at sea level on a perfectly smooth surface. The time is also midnight half-way between the receiver and transmitter, so "Skywave" conditions are optimal.

EDIT: Knowing that the ionospheric radio reflection may or may not randomize the polarization of a reflection, lets simply assume all reflections act as if they are reflecting off of an idealized radio reflector.

• Explain what you mean by this: "Disregarding the polarization effects due to collision with matter." If you remove earth from the picture, then there are two radio stations floating in space and the concept of "vertical" and "horizontal" do not mean anything.\ Apr 13, 2021 at 19:57
• is this a school test question? Apr 13, 2021 at 19:59
• And when you say "sky bounce" do you mean sky wave? Apr 13, 2021 at 19:59
• @mkeith if you remove collisions with earth from the picture, there are still concepts of vertical and horizontal. Apr 13, 2021 at 20:05
• @user8079 Draw a diagram showing the path the wave takes and the polarization, and you should see. Apr 13, 2021 at 20:05