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Weird results (PRN127 is really GAGAN?)

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Nothing special,
just posting some strange acquisition results I've been achieving in Nottingham (UK). How can it be that GAGAN signal (PRN127) was stronger than EGNOS?

Figure 1: INMARSAT 4-F1 (PRN127) orbit data. Courtesy of heavens-above.com


Fig. 2: The code search space, definitely an acquisition...


Fig. 3: The SBAS PRNs correlation result hystogram. PRN127 is stronger than PRN120, PRN124, and PRN126?


Fig 4: As a comparison, the GPS PRNs correlation result hystogram...


Fig. 5: And finally, ESA's creature (should I say Surrey's creature maybe?) is still happily transmitting its data... Go Galileo, go!


P.S.: The front-end is this time a Rakon GRM6800 (nice piece of hw believe me).


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