Photo taken on May 13, 2018 shows the unmanned aircraft vehicle (UAV) carrying the dropsonde, or meteorological data monitor, in Huaibei, East China's Anhui province. [Photo/Xinhua] BEIJING - China has successfully designed and tested its first drone-carried dropsonde, or meteorological data monitor, to carry out meteorological observations. The unmanned aircraft vehicle (UAV) will carry the dropsonde and drop it at an altitude of 6,000 meters to measure atmospheric profiles as the device falls to the ground. Launched using a parachute, the dropsonde can descend at a stabilized speed and cut the atmosphere column like a scalpel to gather data such as temperature, humidity, and wind direction and transmit them to ground receiving devices in real time. The dropsonde carried by UAV was produced by the Second Institute of China Aerospace Science and Industry Corporation Limited (CASIC) and the test was run and monitored by the Meteorological Sounding Center of China Meteorological Administration (CMA) in May. The drone-carried dropsonde is an essential payload for aircraft meteorological sounding, which is more targeted than weather balloons and applied in much wider fields than rocketsonde, said Zhang Xuefen, a researcher at the CMA. Such dropsondes are small and light and have a high accuracy when applied. Once equipped with a power cord and data wire, these dropsondes can be hung from any part of a drone's wing, belly or cabin and work stably and reliably between 70 degrees Celsius and minus 90 degrees Celsius. According to the CASIC, drone-carried dropsondes can be widely used in meteorological emergency, disaster and ecological monitoring and offer a convenient and low-cost option for artificial meteorological observation and response systems in the future. silicone wristbands customprinted wristbandscheap custom braceletscheap silicone bracelets canadacheapest place to buy silicone wristbands
SEOUL - The Republic of Korea (ROK) and the Democratic People's Republic of Korea (DPRK) on Thursday held a working-level talks to discuss security and protocol issues for the upcoming inter-Korean summit later this month, Seoul's presidential office said.The meeting continued for four hours from 10:00 am local time on the ROK side of the border village of Panmunjom, according to the Blue House of the ROK.Nothing was decided at the meeting. The two sides agreed to meet again for the working-level discussion without specifying a date.The five-member ROK delegation was led by Kim Sang-gyun, senior director of the National Intelligence Service (NIS).Four other Blue House officials attending the meeting were Cho Han-ki, protocol secretary to the president, Shin Yong-wook, vice chief of presidential security service, Kwun Hyuk-ki, director of Chunchugwan, Cheong Wa Dae Press Center, and Yun Kun-young, director for government situation room.The DPRK delegation was led by Kim Chang-son, an official from the State Affairs Commission of the DPRK.The working-level dialogue came ahead of the first summit between ROK President Moon Jae-in and top DPRK leader Kim Jong-un, scheduled for April 27 at Peace House, a Panmunjom building controlled by the ROK.If held, Kim will become the first DPRK leader to step onto ROK soil since the 1950-1953 Korean war ended in armistice. The Korean Peninsula remains technically in a state of war.During the working-level talks, the two sides discussed issues on security, protocol and media coverage.The ROK and the DPRK also agreed to hold a working-level dialogue Saturday on the installation of a communication hotline between Moon and Kim.The leaders of the two Koreas agreed to set up a direct hotline of dialogue and have the first phone conversation before the agreed summit is held in late April.
