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Potential Geesat applications (source) |
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RTK-PPP (source) |
As shown here, RTK-PPP augments location data from multiple satellites with the rover's position relative to a terrestrial base station. (The rover could be an autonomous car, truck, crop harvester, etc.).
One can imagine base stations along highways, freeways, and even in cities, but that would require investments by governments at all levels, auto producers, and other private companies. It would also need standards that are compatible with all GNSS systems. This will not happen overnight, but I am not surprised to see Geely leading the way because:
- Geely founder and Chairman Li Shufu is a risk taker in the mold of Elon Musk and Geespace was initiated about six years ago when he “floated his idea of using hundreds of proprietary mini, low-orbit satellites as a more accurate global positioning system for self-driving cars.”
- China has built the world's biggest EV charging network, in stark contrast to US failure. This indicates a will to invest in mobility infrastructure.
- Geely is aware of and perhaps collaborating with Chinese GNSS operator BeiDou which is working toward global centimeter-accurate positioning utilizing LEO, MEO, and GEO satellites augmented by terrestrial ground stations.
- Geely brands sold 2.79 million units in 2023 and China space expert Blaine Curcio concludes that "Within 5-10 years, Geespace could conceivably have a constellation of satellites connecting all Geely cars in a very interesting example of vertical integration (actual use cases pending)."
- ChatGPT reports that BeiDou currently offers a Ground-Based Augmentation System (GBAS) coverage in much of China and plans to cover the entire nation, which is true, but mistakenly claimed there were GBAS instances outside of China at this time. (However, BeiDou's standard satellite navigation service is used in many nations, which must have confused ChatGPT).
A final note -- several of the references in this post are to Blaine Curcio's China Space Monitor. Check it out if you are interested in what China is doing in space. I also used but took with a grain of salt, conversations with ChanGPT: chat1 and chat2.