1. A method comprising: receiving data corresponding to a portion of an incoming radio frequency (RF) spectrum in a satellite receiver; determining a set of estimates from the data, the set including one or more pairs of a channel frequency estimate and a symbol rate estimate, via a linear spectrum analysis including a first pass to determine if any frequency domain averaged fast fourier transform (FFT) bins for the data are above a threshold and a second pass to determine up-slope and down-slope edges of potential channels within the frequency domain averaged FFT bins above the threshold; and determining a refined set of estimates from the set of estimates via at least one non-linear spectrum analysis.