They may have done some WSPR trials, but how do they reconcile the major discrepancy between the proposed Sumatra hugging coastline flightpath, and the more reliable Malaysian primary radar data tracking towards NILAM?
I applaud the attempt, but the accuracy of WSPR is very poor.
What is needed is another position fix.
eg any of the withheld Indonesian primary radar recordings at Lhokseumawe, Sabang, or Sibolga.
Or a phone log on at Banda Aceh.
Or a Banda Aceh CCTV with audio recording.