A new paper published in Navigation, the Journal of the Institute of Navigation, by Aston Baron, Pini Gurfil and Hector Rotstein, outlines a navigation approach based on low Earth orbit (LEO) satellite signals of opportunity (SoOps).

The paper, which reviews existing literature and focuses on an algorithm for using carrier Doppler-shift measurements, suggests improvements in computations by using explicit formulas for the Jacobian instead of numerical approximations.

The use of SoOPs from LeoSat is seen as a resilient alternative to Global Positioning System (GNSS)-based navigation, as they offer desirable characteristics for positioning, navigation, and timing applications.