國產高分四號衛星正式投入使用 分辨率世界最高

China's first high orbit remote sensing satellite, Gaofen-4, went into use after six months of in-orbit testing, the State Administration of Science, Technology and Industry for National Defense announced.

國家國防科技工業局日前宣佈，經過6個月的在軌測試後，我國首顆高軌遙感衛星“高分四號”正式投入使用。

Gaofen-4 is China's first geosynchronous orbit high-definition optical imaging satellite and the world's most sophisticated.

“高分四號”是我國首顆地球同步軌道高分辨率光學成像衛星，也是世界上精度最高的衛星。

Unlike from Gaofen-1 and Gaofen-2 in low orbits around the earth, Gaofen-4 is orbiting at 36,000 kilometers. High orbit satellites have the advantage of being able to snap "grand scenarios." Low orbit satellites, in contrast, can see more detail at faster speed.

不同於“高分一號”和“高分二號”在低軌道繞地球旋轉，“高分四號”是運行在距地36000公里的軌道上。高軌道衛星能夠捕捉“更宏觀場景”的優勢。相反，低軌道衛星可以以更快的速度看到更多的細節。

Low orbit satellites cannot always follow natural disasters, but Gaofen-4 can continuously observe a disaster because it moves synchronously with the earth. It improves the response to disasters like earthquakes, landslides and typhoons with its high-precision sensors.

低軌道衛星不能一直監測自然災害，但是由於與地球同步移動，“高分四號”則可以持續對災害進行監測。因採用高精度傳感器，該衛星還可縮短對地震、泥石流和颱風等災害的響應時間。

Gaofen-4, which was launched in December 2015, has a designed lifespan of eight years, compared to other remote sensing satellites which remain in service for less than three to five years.

“高分四號”於去年12月發射升空，其設計壽命爲8年，相比之下，目前仍在服務的其他幾顆遙感衛星的設計壽命不足3-5年。

During the in-orbit test, Gaofen-4 has been used to collect imageries of flood-hit areas in south China and monitor fires that occurred in southwest China's Sichuan Province and in Russia.

在在軌測試期間，“高分四號”已被用來收集中國南方遭受水災的地區的影像，並監測發生在中國西南的四川省以及俄羅斯的火災。

China started the Gaofen project with the launch of Gaofen-1 in April 2013. It aims to launch seven high-definition observation satellites before 2020, designed for disaster prevention, surveillance of geological disasters and forest disasters and weather forecast.

我國於2013年4月發射“高分1號”，以此拉開了“高分衛星”項目的序幕。該項目的目標是在2020年之前發射7個高分辨率觀測衛星，專爲防災、地質災害監測、森林災害監測和天氣預報而設計。