They note 'In this paper, all GPS measurements are assumed to be processed differentially',
I assume you couldn't get centimeter accuracy without DGPS?
I assume you couldn't get centimeter accuracy without DGPS?
This is not a new tech (or a math rather), it's been around since the early 90s if not longer, and it has interesting practical applications like measuring dam movements.
Without a local reference station, atmospheric and ionospheric disturbances would totally overwhelm the effect they are trying to measure.
This [1] covers it quite well.
It was in mid 90s, but I can guarantee you that I sat next to a math PhD guy who worked exactly on what I described, including the dam deployment. Single receiver, 3mm precison from 3-4 hours of data, no DGPS. This wasn't in the US though.