Japan Aerospace Research Agency (JAXA) plans to launch the Earth Water Environment Change Monitoring Satellite "GCOM-W1" (nicknamed "Water Drop") at the Kagoshima Tanegashima Space Center this summer.
Experts in charge of the project said that the satellite can monitor changes in the ice in the Arctic to grasp the overall situation of global warming, and can also measure the moisture content in the soil to judge the progress of the earth's desertification.
The "Shuizhu" satellite is intended to be launched into a geosynchronous orbit at a height of 700 kilometers using the Japanese-made rocket "H2A". The nose is equipped with two pot-shaped antennas with a diameter of 2 meters. The "AMSR2" (sensor) is used to observe the sea or the surface Emitted microwave. In practice, microwaves can be captured in six frequency bands from 7 MHz to 89 MHz, and rainfall, water vapor, sea breeze, sea water temperature, etc. can be observed.
"AMSR2" is the "AMSA-E" replacement aircraft mounted on the Earth observation satellite "AQUA" launched by NASA in 2002. NASA had tried to develop such sensors but did not see results, because the high Sophisticated design and extreme mechanical manufacturing technology are combined.
The antenna of the "Shuizhu" satellite can rotate at a high speed of 40 times per minute, and can take care of every corner of the earth. The antenna itself scans with the surface of the earth in an arc, and the scanning range is 1450 kilometers. It searches the earth day and night within two days. .
The satellite is equipped with two solar panels. In the universe, the temperature difference between the yin and yang sides of the panel is huge, with a maximum temperature of 90 degrees Celsius and a minimum negative temperature of 80 degrees Celsius. For this reason, a golden heat insulation layer and a silver heat dissipation layer are used on the body surface to adjust the temperature.
As a cooperative satellite of "Water Drop", JAXA plans to deploy three satellites "GCOM-C1", "GCOM-C2", and "GCOM-C3" in orbit at a height of 800 kilometers from the earth after 2014. "C1" is equipped with an optical sensor such as a multi-wavelength radiometer, which can be observed in a multi-wavelength range of 380 nm to 12 microns, near ultraviolet and thermal infrared. It has a resolution of 250 meters to 1 km from the ground and can be used for a long time. Observe the status of dust and clouds, the distribution of plants and plankton, etc., and make a comprehensive observation of the whole earth once every 2 to 3 days.
Once "GCOM-C1" is put into use, we can see what changes global warming has brought to the Earth's heat throughput and the distribution of ecosystems, which will play a role in predicting the future trend of climate change. Observation data will also help people speculate on the location of fishing grounds and monitor the dust flow and dust flow in forest fires.
Japanese experts believe that Earth observation is a long-term work, and it takes 10 or 20 years to complete. Observation data needs to be accumulated and analyzed for a long time. The GCOM plan is planned to be divided into three steps, requiring 6 satellites. Japan plans to use 10 or 15 years. It takes years to build an observation system and do a "health diagnosis" for the earth in space.
Anti-Decubitus Air Mattress Series
Anti-Decubitus Air Mattress Series,Anti Decubitus Bed,Anti Decubitus Air Mattress,Anti-Decubitus Mattress
Hebei Boxin Rehabilitation Equipment Co., Ltd , https://www.boxinnursingbed.com