https://padlet.com/hubkga25/lt7an7vsd8uhtjdm en-us 2020-04-28 21:58:26 UTC 2020-04-28 22:49:08 UTC hello@padlet.com hubkga25 https://padlet.com/hubkga25/lt7an7vsd8uhtjdm/wish/537666138 tap on it]]> 2020-04-28 22:12:15 UTC https://padlet.com/hubkga25/lt7an7vsd8uhtjdm/wish/537666138 hubkga25 https://padlet.com/hubkga25/lt7an7vsd8uhtjdm/wish/537682403 Space based radio navigation system that broadcasts highly accurate navigation pulses on or near earth. ]]> 2020-04-28 22:25:46 UTC https://padlet.com/hubkga25/lt7an7vsd8uhtjdm/wish/537682403 hubkga25 https://padlet.com/hubkga25/lt7an7vsd8uhtjdm/wish/537690083 24 of them in space new ones replacing old, block 3 sent into space 2014.(tap on it) ]]> 2020-04-28 22:32:33 UTC https://padlet.com/hubkga25/lt7an7vsd8uhtjdm/wish/537690083 hubkga25 https://padlet.com/hubkga25/lt7an7vsd8uhtjdm/wish/537695704 A GPS receiver operated by a user on earth measures the time it takes radio signals to travel from 4 or more satellites to its location,The GPS calculates the distance to each satellite and from this calculation determines the user's longitude, latitude, and altitude ]]> 2020-04-28 22:37:20 UTC https://padlet.com/hubkga25/lt7an7vsd8uhtjdm/wish/537695704 hubkga25 https://padlet.com/hubkga25/lt7an7vsd8uhtjdm/wish/537705071 The recevier calculates current velocity by meassuring the instantaneous Doppler effect shifts created by the combined motion of the same four satilites.]]> 2020-04-28 22:45:30 UTC https://padlet.com/hubkga25/lt7an7vsd8uhtjdm/wish/537705071 hubkga25 https://padlet.com/hubkga25/lt7an7vsd8uhtjdm/wish/537709199 "GPS." Britannica School, Encyclopædia Britannica, 3 Dec. 2015. school.eb.com/levels/high/article/GPS/396001.]]> 2020-04-28 22:48:51 UTC https://padlet.com/hubkga25/lt7an7vsd8uhtjdm/wish/537709199