Kalibrate, or kal, can scan for GSM base stations in a given frequency band and can use those GSM base stations to calculate the local oscillator frequency offset. See http://thre.at/kalibrate Copyright (c) 2010, Joshua Lackey (jl@thre.at)
Kalibrate GSM frequency scanner and clock offset calculator
Kalibrate, or kal, can scan for GSM base stations in a given frequency band and can use those GSM base stations to calculate the local oscillator frequency offset. See http://thre.at/kalibrate Copyright (c) 2010, Joshua Lackey (jl@thre.at)
Kalibrate GSM frequency scanner and clock offset calculator
http://ttsou.github.com/kalibrate-uhd/
BSD 2-Clause "Simplified" License