Reflectometry With an Open-Source Software GNSS Receiver: Use Case With Carrier Phase Altimetry. - Laurent Lestarquit; Mathieu Peyrezabes; José Darrozes; Erwan Motte; Nicolas Roussel; Gilles Wautelet; Frédéric Frappart; Guillaume Ramillien; Richard Biancale; Mehrez Zribi (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2016)