My dream of scientific research lies in that deep blue (self-reliance in science and technology, young scientists)

　　Chen Shuguo is in the laboratory. Photo by Mao Lei

　　When I saw Chen Shuguo, he was standing on the coast, guiding the students around him and testing the drone.

　　"Our job is to serve the ocean ‘ Have a physical examination ’ 。” Hand over the remote control of the drone to the students. The young associate professor said, "If you want to develop, utilize and study the ocean, you must first know it and understand everything ‘ Physical examination index ’ . China’s offshore marine atmospheric environment is very complicated. Although China’s autonomous ocean color satellite remote sensing technology has developed rapidly in recent years, how to process the data can be more accurate, and how to determine the error and correct it are all problems we are committed to solving. "

　　Chen Shuguo, 37, is an associate professor and doctoral supervisor at Sanya Institute of Oceanography, China Ocean University, and a part-time researcher at the National Satellite Ocean Application Center. He has been studying marine optical remote sensing for more than ten years, and the on-orbit alternative calibration algorithm of marine optical satellites developed by his team is serving the operational calibration system of China’s independent marine color satellites Haiyang-1 C and Haiyang-1 D. In recent years, Chen Shuguo is in charge of the project "Technical Development of Synchronous Observation System for Marine Water and Atmosphere", which has realized long-term, continuous and stable observation of optical parameters of water and atmosphere, and will be applied to the inspection of marine remote sensing products of Haiyang-1 series satellites and a new generation of water color observation satellites.

　　Calibration of marine optical satellites to make data more comprehensive and accurate.

　　Chen Shuguo became attached to marine optical remote sensing in 2009. That year, he was admitted to China Ocean University as a postgraduate majoring in marine information detection and processing, and saw the sea for the first time.

　　"I am determined to engage in academics." Chen Shuguo’s academic enthusiasm has never wavered since he first entered school. After graduating from Ph.D., he continued to stay at his alma mater to study the basic theory and innovative application of marine optics.

　　"When the sun shines on the water, some of it is reflected, some of it enters the water and is absorbed, and some of it will be scattered. Remote sensing of ocean water color is to analyze the spectral characteristics by receiving these scattered energy and deduce the optical composition of water body. " Chen Shuguo explained, "These detection data play an important role in China’s maritime rights and interests maintenance, marine resources development, marine environmental monitoring and marine disaster prediction."

　　The most efficient and effective way to observe the ocean by remote sensing is to launch ocean satellites. Since the launch of the first ocean color test satellite, Ocean No.1 A, in 2002, China’s ocean satellites have developed for 20 years, and China’s autonomous ocean satellite optical remote sensor is also moving towards the "last mile" of full autonomy.

　　Calibration refers to the process of converting satellite observation data into real radiation. "If satellite observation is a pole ‘ Scale ’ , then calibration is to add ‘ Sight ’ The process can make satellite data more accurate. " Chen Shuguo said, however, for a long time, we have to improve the calibration algorithm and lack the necessary calibration infrastructure.

　　In order to solve this problem, Chen Shuguo settled down and studied hard. Reading literature, publishing papers, leading teams to conduct on-the-spot observation and experiments … … "We have conducted more than 20 voyages of marine optical comprehensive experiments on different types of water atmospheric environment." Chen Shuguo said that a large number of first-hand data have laid a solid foundation for follow-up research.

　　While doing theoretical deduction and finding the best algorithm, the site selection of calibration field is determined through comprehensive analysis of a large number of data. One month before the launch of Haiyang-1 C satellite, Chen Shuguo led a team to develop an on-orbit alternative calibration algorithm for China autonomous ocean color satellite.

　　After years of field observation, the swaying deck is the second laboratory.

　　Ocean optics and water color remote sensing are disciplines based on field measurement. In order to obtain comprehensive field observation data of ocean optics, Chen Shuguo has worked in the observation line for many years, taking the swaying deck as the second laboratory and writing papers on the ocean.

　　For Chen Shuguo, the sea is an unpredictable "old friend". Although he has been dealing with it for more than 10 years and knows it better than others, Chen Shuguo is still looking forward to and uneasy every time he puts the observation instrument into the water for measurement. "Ocean observation not only has bad sea conditions, but also is accompanied by various unknown factors underwater. Changing all the time is the essence of the ocean. "

　　Observation at sea, a voyage is about 20 days. Due to the heavy scientific research tasks, Chen Shuguo once slept less than 4 hours a day on several voyages. Up to now, Chen Shuguo has been at sea for more than 300 days, of which the longest time has been 74 days in the western Pacific Ocean. "Which marine is not ready to bear hardships?" Chen Shuguo said.

　　Love is dedicated to the sea, and the sea is also fruitful. In 2020, Chen Shuguo began to be responsible for the project "Technical Development of Synchronous Observation System for Marine Water and Atmosphere" of National Satellite Ocean Application Center. This project will set up eight inspection systems with long-term continuous monitoring capability of optical properties of marine water and atmosphere along the coastline of China, which can realize long-term, continuous and stable observation of optical parameters of water and atmosphere under unattended conditions.

　　From the calibration algorithm of China autonomous ocean color satellite to the construction of synchronous observation system of ocean water and atmosphere, Chen Shuguo’s dream of deep blue has never stopped.

　　Down-to-earth, really do some original work.

　　In the winter of 2019, Sanya Ocean Research Institute of China Ocean University held an unveiling ceremony and officially settled in Yazhouwan Science and Technology City, Sanya. In May 2020, Chen Shuguo came to the South China Sea from the Yellow Sea.

　　"We want to build a calibration field for marine water color satellites. The seawater in the South China Sea is cleaner, and the complexity of the coastal water atmosphere is not so high." After joining Sanya Oceanographic Research Institute, Chen Shuguo took the lead in building a remote sensing calibration laboratory for ocean color, which can not only effectively support the maintenance of China’s independent ocean color satellite system to replace the calibration field, but also serve the calibration of marine optical instruments in universities and research institutes and ensure the accuracy of measured data.

　　Today, Chen Shuguo’s students are located in Qingdao and Sanya, and some senior students are internship at the National Satellite Ocean Application Center in Beijing. "Every time we have an online group meeting ‘ Longitudinal span ’ In the north and south, some people are attending classes at school, some are studying in the laboratory, and some are internship in the center. " Chen Shuguo said with a smile, "Learning while thinking and practicing, Industry-University-Research is integrated."

　　The ocean is a huge treasure house of resources, and building a maritime power is a major strategic task to realize the great rejuvenation of the Chinese nation. More than 20 years ago, China didn’t have its own ocean satellite, so it was necessary to buy data from abroad to understand the atmospheric situation of China’s offshore water bodies. Nowadays, groups of scientists are working together to promote the high-level self-reliance and self-improvement of marine science and technology. China marine satellites have entered the era of networked observation, which has not only formed the continuous high-frequency observation coverage of global sea areas, but also the data has the same accuracy as international advanced products. "Doing your job seriously is the greatest contribution to the country." Chen Shuguo said.