IIT sites

my.iit.edu
Blackboard

Organizations

National Aeronautics and Space Administration (NASA)
American Geophysical Union (AGU)
American Institute of Aeronautics and Astronautics (AIAA)
Institute of Navigation (ION)

Astronomy Picture of the Day
www.spaceweather.com
NOAA's Space Weather Now

Stanford University GPS Lab resources

US Coast Guard Navigation Center

NOAA's Aviation Weather Center
skyvector.com/