Malaysia Airlines Passenger Plane Lost Contact With Radar Signals Confusing And Difficult To Track

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Malaysia Airlines MH370 aircraft for the search scope has been expanded in two main search area . The picture shows a rescue boat crew Research Malacca map.

BEIJING, March 13 - According to the United States , " Wall Street Journal " Chinese news report, the 12th came the various details about Malaysia Airlines flights were lost to tracking radar signals , these details highlights the news about the plane flight is extremely confusing, also showing radar tracking aircraft very difficult.

Reported that , due to the uncertainty in the end lost to flights flown far, the search and rescue work has become very complex . Most search and rescue operations in the waters between Malaysia and Vietnam launched east of the Malay Peninsula , but Malaysia has also announced the waters west of the peninsula , including the Malacca Strait , including the search area. Week in both regions have expanded the search range .

Several aviation experts said the chaos of the radar signal and did not let them feel special surprise . Reported that the accuracy of a radar image depends on several factors , including whether the object ...
... distance , the complexity of the radar system, and a plurality of ground Malaysian military radio station in that area is scanned .

In addition , the National Transportation Safety Board , Malaysia said it would begin using radar to assist local investigators. The Commission initially promised , only after the discovery of the wreckage will help. It also highlights the difficulty of tracking radars .

Malaysia Civil Aviation Authority , said Abdul Rahman , at 1:21 on the 8th , air traffic control departments in secondary radar system on flight MH370 lost the trail , 1:30 flight disappeared in the last radar systems . He said that when aircraft over the South China Sea is 35,000 feet ( about 10,670 meters ) cruising altitude .

Reported that , as with the international practice , Malaysia ATC center also uses two primary radar and secondary radar radar system to monitor airspace. Primary radar is called non-cooperative system , without identification of objects tracked from the ground , regardless of whether the target being tracked willing to be monitored.

Cooperation is called secondary radar system , it will send a signal from the ground , the aircraft required to identify themselves ; then transponder on the aircraft will be sent back to the code, including flight number , flight speed , altitude and other parameters , including . Provide primary radar aircraft distance , heading and orientation information .

Aviation consultant Mike Ryan (Doug Maclean) , said secondary surveillance radar range is usually greater than the primary radar , the former can detect 35,000 feet altitude of about 200 miles ( about 322 km ) range , and the latter can detect about 115 miles ( about 185 km ) range. Therefore , McLean said , under normal circumstances it should be the first aircraft disappeared in the last radar. But MH370 flight is to start on secondary radar disappeared .

McLean noted that the radar system's own failure " is almost impossible ."

The report also pointed out that there is a Malaysian military air defense radar system and a set of civilian air traffic control system . This system also tracks the MH370 civilian flight, but the military was missing until after the flight to check the radar data . Later, the aircraft lost contact ever appeared in hundreds of miles westward deviation from the original route of the Malacca Strait , the current information is very confusing.

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