They tracked down these Tsunami effects in the skies using GPS signals from the different statelites that relays data to the downer receivers.
According scientific evidence gathered by NASA recently, the the phenomenal tsunami and earthquake that rocked Japan recently, destroying the nuclear plant of Fukushima did not only stop at earthly havoc. The quake actually caused a massive disequilibrium in the upper atmosphere of the planet as well.
NASA has now detectedmassive waves of energy generated by the Japan earthquake as high above as the ionosphere, a section of the atmosphere in the range of 50-500 mile above sea level. This is furthest zone of the atmosphere where ultraviolet radiation disintegrates molecules to leave a huge haze electrons and ions.
NASA tracked down these Tsunami effects in the skies using GPS signals from the different state-lites that relay data to the downer receivers. It is not yet clear what the long term effects of the Japanese earthquake will have globally, let alone over Japan itself, but experience from other Tsunamis and earthquakes show that these disturbances in the upper strata of our atmosphere is not unusual because similar effects were detected when Samoa and Chile experienced tsunamis in their regions in 2009 and 2010 respectively.