| Soldier Digital Assistant explanation and photo• —Responsible for designing and acquiring the system on behalf of the US Government | —Established in 2004 to oversee management of GPS and GPS augmentations at a national level |
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| Three distinct parts make up the Global Positioning System | 1 "GPS: Global Positioning System or Navstar Global Positioning System " Wide Area Augmentation System WAAS Performance Standard, Section B |
| With this information the receiver produces a general position latitude, longitude, and height for the antenna | In order to make sure that they can be detected from anywhere on the Earth's surface, the satellites are divided into six groups of four |
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| "Leica VIVA GPS System GPS SYSTEM 1200 8 | from the original on January 18, 2018 |