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Original title: Ocean II C satellite launches further construction of China’s dynamic marine environment monitoring network Source: Science and Technology Daily
The reporter learned from the National Space Administration that at 1:40 p.m. on September 21, the Long March 4B carrier rocket was ignited from the Jiuquan Satellite Launch Center and successfully launched the Ocean 2C satellite into its intended orbit. .
Ocean-2C is the second satellite in China’s dynamic marine environment monitoring network, and it is also China’s first large-scale remote sensing satellite operating in an inclined orbit. Once it enters orbit, it will form a network with the Ocean 2B satellite, greatly increasing the range, efficiency, and accuracy of China’s ocean observation.
The National Space Administration is responsible for the organization and execution of the Marine II C satellite project. The Ministry of Natural Resources is the main users department. The National Center for Oceanic Applications by Satellite of the Ministry of Natural Resources is responsible for the construction and operation of the terrestrial systems and the application systems; The Fifth and Eighth Academy of Aerospace Science and Technology Corporation of China The executive director is responsible for the development of satellite systems and launch vehicle systems; The China Satellite Launch Measurement and Control System Department is responsible for the organization and implementation of the launch site and the measurement and control system. This mission is the 347th launch in the Long March series of carrier rockets.
The journalist learned from the Fifth Academy that after the launch of the Ocean II D satellite and the completion of the network of three satellites, China will have the ability to cover the major marine areas of the world in one hour and at the same time be able to observe Sub and mesoscale oceanic phenomena for the prevention of marine disasters. Disaster reduction, meteorology, transportation, and science applications provide important support.
Unique multi-function satellite “walk position”
Ocean-2C has the characteristics of agility, quick eyes and quick hands, and can achieve a higher frequency of observation of the ocean wind field.
Compared to the synchronous orbit of the sun where traditional remote sensing satellites operate, the “positioning” of the star Ocean-2C is very unique. Under the careful design of the Fifth Academy R&D team, Star C will operate in an inclined orbit to further enhance China’s ocean observing capabilities.
At the same time, the satellite has multiple functions: the Fifth Academy designers summarized its functions as “wind capture, sea reconnaissance, vessel assessment and log collection.” From measuring the wind vector of global ocean surface and global sea level, to automatic identification of global ships, to receiving, storing and sending measurement information from global maritime buoys, this suite of capabilities benefited from the goal of development of multi-functional satellite integration followed by the development team. .
The satellite is delicately organized with payloads such as the microwave scatterometer, ship identification system and data collection system, and many indicators have reached the international advanced level. The ship identification system can perform calculations of the ship’s position, course and speed on the global sea surface, and other data calculations, which greatly improves maritime traffic and maritime safety capabilities; The data collection system can effectively obtain marine buoy signal data and uniformly transmit the buoy point measurement information to the ground for processing. The accuracy of the marine forecast system is greatly improved by accurately measuring the point and surface combination.
In addition, Ocean-2C also performed the optimization of the launch site process of large remote sensing satellites by transporting the belt solar wing of the entire satellite, which greatly shortened the launch site duty cycle and has a good effect on downstream optimization of large remote sensing satellites and commercial satellites. Promotion and demonstration effect.
Monitoring is implemented 24/7
As a major ocean country, the value of China’s ocean production accounts for an increasing proportion of its GDP, and dynamic marine environmental early warning to achieve sea state forecasting will generate many sustainable and predictable benefits.
For example, by monitoring the trajectory and intensity of typhoons (central wind), HNA’s safety will be effectively guaranteed; By monitoring changes in ocean temperature, the vortex can determine the location of fishing grounds, which can then achieve accurate fishing. In addition, related applications can also provide support for offshore cultivation of pearls and sea cucumbers.
After the Ocean-2C satellite enters orbit, it will not be affected by weather and light conditions, will continuously monitor the dynamic marine environment throughout the day and in any weather, and provide effective services for countries along the “Strip and Route”. At the same time, its remote sensing data can also be applied to research on ocean geophysics, ocean dynamics, ocean and environmental climate monitoring, sea ice monitoring, etc.
When satellites C and B conduct the two-satellite network, the observation period will be reduced from 3 days for a single satellite to 1 day.
In the follow-up, the three-star Ocean II B, C and D network will be the first ocean energy monitoring network in China. In addition, the system will achieve high temporal resolution, high spatial resolution, high precision, and global coverage of the sea surface height, the effective wave height, the sea surface wind field, the surface temperature. of the sea and other observations of marine dynamic environmental elements, while providing important support for China’s marine industry. It will also help the innovation and development of related industries at home and abroad.
