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Wang, Kan (author), Khodabandeh, Amir (author), Teunissen, P.J.G. (author)For long-baseline over several hundreds of kilometers, the ionospheric delays that cannot be fully removed by differencing observations between receivers hampers rapid ambiguity resolution. Compared with forming ionospheric-free linear combination using dual- or triple-frequency observations, estimating ionospheric delays using uncombined...journal article 2018