Break couplet 5 years to Ma Hang MH370. But arrive to also did not find now,ask why to search so hard: Employ a satellite to also did not search: Pick choose news: Want to undertake the satellite locates directly, must ask flying function issues radio signal to the outside.
Civil aviaton plane contains GPS navigational aid basically, carry flight state the satellite to send the ground in real time through satellitic data catenary, but premise is navigational aid is in regular job status, can be Ma Hang from shut GPS navigation system artificially after Vietnam border land breaks couplet, once the plane produces an accident, navigator is destroyed, the satellite also did not have a law to locate.
Additional, although Boeing is returned on 777 planes,locate of lash-up catapult (ELT) , but the radio signal that fixed position catapult issues is transmitting in water. If ELT antenna duck, it cannot issue radio signal external.
When fixed position invalidation, the satellite can take a picture into line scanning only. And the difficulty of satellitic observation depends on motor-driven ability differring, not quite agile. Change course difficulty is great, time-consuming long.
The satellite repeats the cycle that has scanning to an area to be in commonly 2-10 day, scan every time width counts 100 kilometers nevertheless, and the search area that is aimed at equestrian boat plane this has enlarged a thing nearly 2000 kilometers, so even if is a satellite also not be the job that a short time can finish. And the satellitic photograph that publishs from NASA and Chinese Academy of Sciences looks, filmed area picture resolution is not quite high also, discover very valuable content from which hard.
