With the GPS-Assist option, the CT-200 links to the Worldwide Reference Network (WWRN) which has Triple-redundant coverage of the GPS constellation by using reference stations on every continent. The WWRN sees all the satellites, all the time, and exceeds 99.999% uptime. It provides AGPS information to the CT-200 in the form of Long Term Orbits (LTO) data. LTO delivers satellite orbit data to the CT-200 for 7 days in advance. This assists the CT-200 in eliminating the time to "acquire satellites" from orbit directly. This speeds TTFF (time to first fix) from minutes to seconds, and enables operation in urban, indoor, & obstructed environments where traditional GPS commonly fails.
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