Since the GPS global positioning system of the United States, this technology focusing on location information has gradually entered people's vision, and received great attention, with rapid d...
The U.S. Communications Commission (FCC) passed the Enhanced 911 Act in 1996 (revised again in 1999), requiring mobile phone operators to know the geographical location of each mobile phone (the e...
There are 2D and 3D coordinates. When GPS can receive signals from 4 or more satellites, it can calculate 3 local micro coordinates: longitude, latitude and altitude. If it can only receive signal...
The guidance function works under the following conditions: 1.) To set the GOTO target You can press the "GOTO" key to set the "Go" target, and then select a landmark from the...
Because of its durability and relatively easy fabrication, the flat plate antenna has become the most widely used type of antenna. Its shape can be round, square or rectangular, just like a printe...
The four arm spiral antenna consists of four specially curved metal lines. No grounding is required. It has the characteristics of Zapper antenna and vertical antenna. With this ingenious structur...
From outdoor to indoor, there are more and more location-based services, and more and more positioning technologies are gradually entering the mass market from the niche market. The market positio...
Introduction to the structure of the logistics tracking system: Based on the investigation of the logistics link of valuables, a logistics tracking system with the STM32F103RB series MCU as the co...
Space part The space part of GPS is composed of 21 working satellites, which are located 20 200 km above the earth's surface, evenly distributed on 6 orbital planes (4 for each orbital plane)...
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