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        Q: Distance from earth to gps satellite?
A: There are twenty-four satellites in the United States GPS system that are actively involved . There are six more that are `` asleep '' and saving power till these people are activated shall be substituted for one of the 20-four satellites that has to be taken off line for maintenance , harm , and therefore forth . The Russians also have approximately that numbers of satellites in their GLONASS system . Europe is deploying satellites in its Galileo positioning system . Japan has or will launch first timely satellite in its QTZZ positiong system . There 's also around 4 satellites in WAAS , the Wide Area Augmentation System that makes GPS more specific . Europe version of this situation is EGNOS , or European Geostationary Overlay Service . It has 4 or 5 satellites . 

Q: Best in-car GPS navigation system?
A: I assume by 'service providers in ' you mean maker . The US air force 's the only actual 'service providers in ' , and does so for free !  Which brand 's the best depending on lots of things . It depends wherever you are - as to which mappings available . Smaller countries are far more likely to solely receive support by the greatr producers .  It also depends which extras you want - such as additional voices , bluetooth , mp3 playing , etc .  Garmin , Navman , Tomtom 're all good brands , and have maps for the majority countries .  One thing ask questions about is map updated . There 're nothing more frustrating than keep getting inaccurate instructions because the mapping is inaccurates - yet the company wants half the cost of the GPS is once again update the mappings . 

Q: GPS Receiver for Laptop to work with google earth?
A: Most GPS software be extremely proprietary . ( IE : You ca n't use Magellan with Garmin , etc ) . You required to know who made the software , and find out which GPS systems it is consistent with .