Testing the Flyby Anomaly with the GNSS Constellation
  We propose the concept of a space mission to probe the so called flyby anomaly, an unexpected velocity change experienced by some deep-space probes using earth gravity assists. The key feature of this proposal is the use of GNSS systems to obtain an increased accuracy in the tracking of the approaching spacecraft, mainly near the perigee. Two low-cost options are also discussed to further test this anomaly: an add-on to an existing spacecraft and a dedicated mission. 
O. Bertolami, F. Francisco, P. J. S. Gil, J. P\'aramos
physics.space-ph astro-ph.EP gr-qc