GPS Tracking

I asked Mrs. B "What are they doing in the middle of the river?" She said, "Okay, let's think about it. It is winter in Alaska. They are actually running right down the river but the river is frozen. "

Mrs B showed me that when I am looking at the GPS tracker I can switch to satellite view and zoom in, which I think is pretty cool. So then I asked, "If it is winter, why is everything green and brown." Mrs. B said, "That is a good question. Google Earth uses images that were taken from airplanes. These images weren't taken during the Iditarod or even during the winter. Google Earth images are not in real time." 

That made me wonder, what is GPS and how does it work? So Mrs. B said I could read so articles by Libby Littles (she is a sled dog reporter, just like me) to learn about GPS trackers. She has a couple great articles you should read. What is a GPS Tracker and Images of GPS Trackers