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Spotlight+Spotlight Map How Works GNSS Videosfun fact #1 was first referred to on the "Bart the Fink" episode of the The Simpsons . fun fact #2 warning messages are officially known as NANU (Notice Advisories to Navstar Users). fun fact #3 Another :-) fun fact #4 Russia, China, and the European Union also have -like constellations. fun fact #5 A satellite returns to almost exactly the same position in the sky every 23 hours, 55 minutes, and 56 seconds. fun fact #6 A satellite weighs nearly 3,600 lb. fun fact #7 Scientists use to track animals. fun fact #8 can be used to measure how the ground moves during an earthquake. fun fact #9 The master control station is in Colorado Springs, Colorado. Last modified: 2022-10-18 16:57:05 America/Denver Please send comments and corrections to education unavco.org . Copyright © 2012 - 2024 UNAVCO and the Reflections Research Group . All Rights Reserved. Funding and Acknowledgements . × PBO H 2 O FundingFunding and Acknowledgements This site is currently supported by the National Science Foundation (NSF) under Grant No. 1261833 to UNAVCO for operation of the GAGE Facility. The site was originally developed by the Reflections Research Group at the University of Colorado (CU) using funding from NSF EAR1144221. It was built by Evan Pugh and Kristine Larson at CU and by the UNAVCO Education and Community Engagement Program. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation , NASA , UNAVCO , or CU...