According to foreign media reports, EDRS-A was the first relay satellite of the EDRS space data highway project and was launched on January 30, 2016, successfully sending the first image taken by Sentry 1A satellite. The image captured the island of Reunion and its coastal areas and was successfully received by the German Airbus Defense and Space Mission Center (MOC) in about 1 minute. The orbital test procedures conducted by Airbus and space engineers are nominally running and confirm that service operations will begin in July 2016. The space data highway system will provide high-speed laser communications in space at up to 1.8 gigabits per second.
The Copernican Sentinel and Sentinel Satellites, as well as the European Earth Observation Project, are equipped with laser communications terminals that will significantly speed up the transmission of real-time data and large volumes of data to the center of the Earth.
This major project, costing almost 500 million euros, is the result of the European Space Agency (ESA) and Airbus Private Equity Joint Venture (PPP). Thanks to the laser technology developed by Spacecom Defense and Space Branch - SpaceSpacecom, the space data highway will be able to transmit high-capacity (high-volume) traffic through Earth observation satellites, drones and surveillance aircraft and even a space station such as the International Space Station information. Due to the extremely high laser communication rates and geostationary orbit positioning of relay satellites (up to 50 terabytes per day), images can be transmitted to the Earth in near real time. The European Commission will be the first customer of the space data highway system.
The Copernican Sentinel and Sentinel Satellites, as well as the European Earth Observation Project, are equipped with laser communications terminals that will significantly speed up the transmission of real-time data and large volumes of data to the center of the Earth. In the case of crisis or natural disaster management, up-to-date information is of the utmost importance to the authorities because of the most appropriate emergency preparedness. Evert Dudok, head of CIS, said the space data highway is no longer a science fiction. It will revolutionize satellite communications and will be at the forefront of the European aerospace industry in technology and innovation services.
Magali Vaissiere said that with today's first session, EDRS could be almost operational to provide the European Commission with the Copernican Sentinel satellite service. The first communication node of the spatial data highway system is located at 9 degrees east longitude and will be able to establish a laser link with orbiting observation satellites. UAVs are located in the eastern and eastern coasts of Europe, Africa, Latin America and North America. The second satellite, to be launched in 2017, will expand the system's coverage, capacity and redundancy.
Airbus Defense and Space and ESA are seeking partnerships to further expand the space data highway program by 2020, one-third of which will be located in the Asia Pacific region. For example, the Pacific Rim has seen a dramatic increase in the demand for aeronautical mission communications.
Take a deep breath, close your eyes, the world has the freshest oxygen ... Yu Quan's "Deep Breath" is well known to us, but as the environmental problems become more and more serious, the haze sky also increases, PM2.5 PM10 and so on Vocabulary has also been mentioned more and more, and air purifiers have quickly become popular on the market with this "air quality" trend. Along with this, the air-clean brand has sprung up, and various technologies are dazzling. Which ones are indeed effective and which are just tasteless propaganda? How does the air purifier bother us to get rid of pollution? And look at the editors for you.
Analysis of air purifier
The critical value of PM2.5 content is 75 μg / m3
The pollutants in the air mainly include soot, total suspended particulates, inhalable particulates (PM2.5) and fine particulates (PM10). The smaller the diameter of the particulates, the deeper the part that can enter the respiratory tract. 10 micron diameter particles It is deposited in the upper respiratory tract, and particles below 2 microns can penetrate 100% into the bronchiole and alveoli.
1k-5k air purifier prices vary greatly
The air purifier products on the market not only have various functions, but also have prices ranging from thousand yuan to tens of thousands. The pricing of imported products is generally higher than that of domestic brands. Except for the core technology of many brands, the promotion of purification effects is similar, and consumers need to choose according to demand.
The air quality standard of 74 key cities is only 4.1%
According to the data of the press conference held by the State Council Information Office on June 4, according to the new "Ambient Air Quality Standards", the six pollutants SO2, NO2, PM10, PM2.5, CO and O3 were evaluated, 74 new standards In the first phase of monitoring and implementation, the proportion of cities that met the ambient air quality standards was only 4.1%, and the other 256 cities implemented the old air quality standards, and the proportion of cities that met the standards was 69.5%.
Air purifier sales increased by 90.5% compared with last year
According to a report recently released by the China Electronics and Information Industry Development Institute, due to the haze weather, air purifiers have become the most concerned home appliance products, with sales of nearly 2.4 million units nationwide last year, a year-on-year increase of 90.5%; retail The amount reached 5.6 billion yuan, a year-on-year increase of 105.9%.
HEPA filter needs to be replaced in March
The filter of the air purifier is the same as the filter of the water purifier, and it is not effective for a long time. After long-term use, the accumulation of dust on the surface of the filter will also cause the filter to gradually fail. Therefore, when the haze is more serious, the non-washable HEPA filter needs to be replaced every three months.
Merchants claim that the purification rate is more than 99% for the concept of stealing
99% or even 99.99% seems to have become a slogan for many air purifiers on the market. Many brands of products promote their high removal rate of PM2.5 and formaldehyde. In fact, this kind of publicity is more of a kind. The slogan of stealing the concept, the removal rate of 99% is the effect of the material itself on PM2.5 and formaldehyde, not the effect of actually running in space.
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