An Illustrated Guide to Relativity
http://edu-observatory.org/olli/Relativity/Week8.html


Relativity in the Global Positioning System
  http://relativity.livingreviews.org/open?pubNo=lrr-2003-1

Relativistic Effects on Satellite Clocks
  http://relativity.livingreviews.org/open?pubNo=lrr-2003-1&page=articlese5.html

  


Gobal positioning System Resources
  http://edu-observatory.org/gps/gps_books.html


Some Recommended Smart Phone Apps making Use of GPS
_____________________________________________________________
Emerald Chronometer (Geolocation, NTP)
  http://www.emeraldsequoia.com/h/
  http://itunes.apple.com/us/app/emerald-chronometer/id284953670?mt=8

NOAA Wx Center (Geolocation)
  http://itunes.apple.com/us/app/noaa-weather-center/id514194829?mt=8

SkySafari Pro (Geolocation, NTP, Auto Updates)
  http://itunes.apple.com/us/app/skysafari-3-pro/id437112382?mt=8
  https://play.google.com/store/apps/details?id=com.southernstars.skysafari_pro&hl=en

Planisphere (Star Map)
  http://itunes.apple.com/us/app/id517591777

Find My Phone (Geolocation)
  http://itunes.apple.com/us/app/find-my-iphone/id376101648?mt=8

FCC Mobile Broadband Test (Geolocation)
  http://apps.usa.gov/fcc-mobile-broadband-test.shtml

Speedtest.nert App (Geolocation)
  http://itunes.apple.com/us/app/speedtest.net-mobile-speed/id300704847?mt=8

Apple Maps (Geolocation)
  http://www.apple.com/ios/maps/
  http://appleinsider.com/articles/12/10/08/in-depth-review-apples-ios-6-maps-the-alternatives-2-maps-and-visualizations

Offline Topo Maps (Geolocation)
  http://itunes.apple.com/us/app/offline-topo-maps/id376535806?mt=8

Peak Finder USA West (Geolocation)
  http://itunes.apple.com/us/app/peakfinder-usa-west/id387214656?mt=8
  http://www.youtube.com/watch?v=o5pABR_mudI

Topo Profiler (Geolocation)
  http://itunes.apple.com/br/app/topo-profiler-elevation-graph/id478596308?mt=8

Waze social GPS traffic & gas (Geolocation)
  https://itunes.apple.com/us/app/waze-social-gps-traffic-gas/id323229106?mt=8

Altitude (GPS, Geolocation)
  http://itunes.apple.com/us/app/altitude-app/id331726962?mt=8

Aircraft Altimeter (GPS)
  http://itunes.apple.com/us/app/aircraft-altimeter/id300399956?mt=8

Orienteering Compass (geolocation to determine declination offset)
  http://itunes.apple.com/us/app/orienteering-compass/id372749402?mt=8

GPS Location (GPS)
  http://itunes.apple.com/us/app/gps-location/id353474465?mt=8

Basic GPS (GPS)
  http://itunes.apple.com/us/app/basic-gps-now-utm-mgrs-email/id293699773?mt=8

Commander Compass
  http://itunes.apple.com/us/app/commander-compass/id333235419?mt=8




 
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