| 摘要 |
<p>Disclosed is GNSS extension device for use with portable devices in a Mapping and Geographical Information System ("MGIS"). The GNSS extension device includes a dual frequency GNSS antenna, a GNSS processing board for tracking and processing GNSS signals, a battery to sustain the GNSS processing board and antenna, and an application to manage GNSS device and position solution usage flow. The device also includes a portable device receiver to receive and retain a portable computing device, wherein the portable computing device executes instructions provided by the application. Thus the combination of the GNSS extension device and the portable computing device becomes a MGIS-like device.</p> |
