QUOTE (jmknapp @ Jun 30 2008, 04:21 PM)
Anyone know of a web app or program that shows the current subsolar point on the Sun on the Earth (and displays the latitude & longitude)?
Hi jmkapp,
if you mean the points on the Earth that are directly below the celestial object in question.
I use a satellite tracking prgram called Wxtrack by David Taylor.
It shows those points for the Sun and the Moon as a large yellow circle and a grey cricle with phases.
Give that a whirl. You will need to set it up to your location on Earth and timezone.
If you want to follow any spacecraft such as the ISS (Space Station) you will need to download the keps (keplerian elements) for the spacecraft of your choice. Get the keps from Celestrak website.