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Successful Synchronized Observation of River Source Region on the Qinghai-Tibet Plateau
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CEODE recently succeeded in performing a tentative synchronized observation simultaneously by using spaceborne, airborne and land-based equipment. This test was deployed in two zones, one of which spans from the source area of the Yellow River to Madoi County, and the other from Dongkemadi to Beiluhe River, lasting for over ten days. As part of a national “973” project named Mechanism and Methods of Earth Observation for Sensitive Factors in Global Change from Space, this test was aimed to measure a series of parameters including soil layer, vegetation, lakes, residual snow and glaciers.

Sample data obtained by the aircraft equipped with hyperspectral sensor

A CEODE plane attended the test with onboard multi-spectroscopic and high-spectroscopic detectors. Two field work groups, one coordinating group and an aviation group, 26 persons in total took charge of the test.

According to the initial plan, the first fieldwork group conducted observational experiments on grassland plots, spectra, atmospheric parameters, aerosol, wetlands and biomass from 25 August to 1 September around the Gyaring Lake in Madoi County. The second field work group observed the permafrost, flow velocity of glaciers and snow parameters in experimental zones in the source area of the Yangtze River, and the Tuotuo River, Beiluhe River, and Donkemadi experimental zones from 27 August to 31 August. The second group also installed a glacier angular reflector on the Tanggula (Dangla) Mountain Range and conducted total-station measurement and static GPS measurement. Both the groups successfully accomplished their preset tasks.

Sample data obtained by the aircraft equipped with near infrared (NIR) sensors

After preparation made by a coordinating group, the aviation group conducted the first flight of this test on August 29 and successfully obtained data of good quality (shown in Fig. 1 and 2). As of the afternoon on 31 August, the aviation group had finished observing the first and second strips and half of the third strip of the Madoi experimental zone (whose arrangement is shown in Fig. 3). After taking a rest for one day on 1 September, the aviation group chose another day to finish observing the rest of the third strip, by taking advantage of favorable local weather conditions.

The project Mechanism and Methods for Earth Observation of Sensitive Factors of Global Change was started in November 2008. It is led by the CEODE and attended by six academic institutions including the CAS Institute of Tibetan Plateau Research. Its accomplishment will lay a solid foundation for establishing a China’s RS monitoring system for global change, upgrading the theoretical and technical levels of China’s space-based observation of signal elements and securing a position for the country in the research on global change and global synchronized RS observations.
Pilot areas and three trials in Maduo County
Center for Earth Observation and Digital Earth,Chinese Academy of Sciences
No.9 Dengzhuang South Road, Haidian District, Beijing 100094, China Tel:86-10-82178008 Fax:86-10-82178009