Three operators to start the MA Airlines rescue has begun cell phone signal detection

The http://www.aliyun.com/zixun/aggregation/33930.html ">mh370" has been missing for several days, and the Chinese government has sent an unprecedented search and rescue team, which is not enough. Tencent technology from the domestic three major operators learned that China Mobile (micro-blog), China Telecom (micro-blog), the Chinese unicom (micro-BO) have started the relevant MA Airlines MH370 Search and rescue work.

China Unicom launches satellite circuit rescue. 13th, Beijing Unicom for the flight of the sea police lost the aircraft to rescue the emergency launch of satellite circuits. According to Tencent Science and Technology, Beijing Unicom Transmission Center and the satellite bureau in close cooperation for the MA Airlines MH370 aircraft search and rescue business emergency opened a 2M circuit for the transmission of the search and rescue information. At this point, Beijing Unicom to use the VSAT platform for the South China Sea to save 101 ships successfully opened the Internet, telephone, fax business, thus for the search and rescue work contributed to the Unicom a force.

Since March 9, Beijing Unicom Mobile Office dispatched C-band satellite communications vehicles and technical personnel to the SOA Maritime Command Center, the Chinese Sea police 3411 vessels into the aircraft suspected to be lost in the sea, the maritime search and rescue situation to carry out real-time satellite transmission, and for CCTV transmission of the China Sea Police Bureau Expert Group Command work, Sea police ship about 200 square kilometers search and rescue, suspected to be the central point of the sea area, weather and other on-site return of search and rescue signals.

In addition, China Telecom and China Mobile have also started related work. According to Tencent Science and technology, the horse side of the relevant agencies to China Telecom mobile phone signal detection needs, and China Mobile has also begun to prepare, but for foreign media reported in the middle-shift executives are not officially confirmed.

MH370 flights have been lost for more than 120 hours, and the information on the situation and wreckage of the aircraft before they disappeared has been repeated but not confirmed.

And for passengers on the plane after the phone can still get through the abnormal situation, according to the relevant field experts to Tencent technology, mobile phone radio frequency should be a high-frequency shortwave, short-wave in the open area with good communication, so even if the aircraft in the clouds will also receive the command signal Tower, So the phone should also be able to have a signal. But because of the shielding function of the fuselage, the signal may not be very good. In addition, the shortwave will be reflected back to the ground after encountering the ionosphere, so it will spread far away.