A "cloud-end" architecture-based PPP-RTK enhancement method. First, massive high-precision user terminals around the globe perform PPP, and once the locations thereof converge, space correction information (comprising ionospheric correction numbers, and tropospheric correction numbers) based on the precise locations thereof is generated, and is uploaded to the "cloud" by means of a communication link. Then, in the "cloud", the space correction information from the massive user terminals is uniformly and intelligently processed to generate gridded space correction parameters, and low-orbit satellites are used to broadcast the space correction information to users in corresponding regions. The user terminals use the received correction information to perform PPP again, and upload the space correction information that is based on the precise locations thereof to the "cloud", which achieves PPP-RTK service around the globe by means of the intelligent evolution of the massive user terminals. The problem in which a traditional PPP-RTK service requires that a large number of ground monitoring stations be built, which is extremely costly and cannot achieve wide-area PPP-RTK service around the globe, is solved.
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