Satellite Pings

• Missing plane's black box batteries will die by mid-April

  Equipment inside two nearly indestructible boxes aboard the missing Malaysia Airlines plane recorded critical information that would help investigators reconstruct what went wrong.

• Malaysia says evidence of final 'ping' from MH370 at 0019 GMT

  Satellite data that confirmed a Malaysian jetliner missing for more than two weeks crashed in the Indian Ocean included a final electronic signal that is still being investigated, Malaysian acting Transport Minister Hishammuddin Hussein said on Tuesday.

• UK satellite operator used 19th century physics to trace missing plane

  Britain's Inmarsat used a wave phenomenon discovered in the 19th century to analyse the seven pings its satellite picked up from Malaysia Airlines Flight MH370 to determine its final destination.

• Satellite 'pings' revealed missing Malaysia plane's path

  The satellite operator Inmarsat said on Monday it managed to work out which direction the missing Malaysia Airlines plane flew in by measuring the Doppler effect of hourly 'pings' from the aircraft.

• Satellites picked up 'pings' from Malaysia Airlines jet: sources

  Communications satellites picked up faint electronic pulses from Malaysia Airlines Flight 370 after it went missing on Saturday, but the signals gave no information about where the stray jet was heading and little else about its fate.