satellites

Suppose there's an apocalypse, and all the GPS satellites are still in orbit and working fine, but they stop receiving time corrections from ground stations. My question is, what happens to the accuracy and precision of any GPS units still operating on Earth? As a follow-up, will the signals...

So, I was doing a little star-gazing tonight and I noticed one body that looked like a star starting to move. I was waiting for it to "shoot," but instead it kept moving through the sky...rather quickly. It was roughly a south to north trajectory and I watched it until I lost sight of it...

Neato quickie Java applet for visible satellite passes! Impress your friends! Convince your neighbors you're a CIA agent! Tell 'em only YOU can see the black helicopters! Go to the website, click the link to start the Java applet, and walk it through one tab at a time. It's all logical, and in...

China has beamed a ground-based laser at U.S. spy satellites over its territory, a U.S. agency said, in an action that exposed the potential vulnerability of space systems that provide crucial data to American troops and consumers around the world. The Defense Department remains tight-lipped...

Warning: The following post contains absolutely no valuable information whatsoever... just the report of an incident that made me laugh. A few weeks ago we were in line at the Candian border crossing, slowly creeping forward in one of several lanes. As is often the case, our lane seemed to be...

Just about who can gain access to remote sensing satellites? Can just about anyone who has a good radio antenna do it? If someone makes their own amateur radio telescope, do they have to get permission from nasa to access their satellites or the satellite of another nation? Just curious.

Transmit photos in the old days? In the old days, satellite photos were often developed, and then blown-up to make them large enough to gather intel. The question is, how'd the film get down to earth from a satellite orbiting some thousands of miles up in space... -INRM

The other night, an hour or so after dusk, I was outside, looking at the sky. In the space of about 5 minutes I'd seen 7 satellites. The thing that got me wondering was that 5 of them were travelling south to north, one was travelling north to south, and only one was travelling west to east...