免费不卡中文字幕在线|久久做人人做人人综合|初尝黑人嗷嗷叫中文字幕|国产成人v片视频在线观看|欧美日本国产VA高清视频|亚洲国产精品国自产拍AV|国产欧美精品一区二区色综合|微拍国产私拍福利88精品视频

  • <button id="0gwi0"></button>
    <tfoot id="0gwi0"></tfoot>
  • <dl id="0gwi0"><acronym id="0gwi0"></acronym></dl>
    <li id="0gwi0"></li>
    <rt id="0gwi0"><acronym id="0gwi0"></acronym></rt>
  • <rt id="0gwi0"></rt>
  • Chinese scientists use domestic satellite to conduct light pollution research

    Source: Xinhua| 2018-09-09 20:09:37|Editor: Li Xia
    Video PlayerClose

    BEIJING, Sept. 9 (Xinhua) -- Chinese scientists have conducted nighttime light pollution research using a domestically-produced remote sensing satellite, according to the Chinese Academy of Sciences (CAS).

    Scientists from the Institute of Remote Sensing and Digital Earth of the CAS assessed the potential of using Luojia-1 nighttime light imaging to measure artificial light pollution.

    Luojia-1, a scientific experiment satellite, was sent into space on June 2 this year. Its spatial resolution reaches 130 meters.

    Compared with ground-based measurements, nighttime light remote sensing is able to acquire larger-scale and higher quantities of artificial lighting data.

    The scientists found that Luojia-1 can detect a higher dynamic range and capture the finer spatial details of artificial nighttime light.

    Excessive lighting in the cities can cause light pollution which has negative effects on animal behavior, human health, the ecological environment, and astronomical observations. Light pollution is highly related to the economic development.

    The averages of the artificial light brightness differed across various land use types. The brightness of the artificial light pollution of airports, streets, and commercial services was high, while dark areas include farmland and rivers.

    TOP STORIES
    EDITOR’S CHOICE
    MOST VIEWED
    EXPLORE XINHUANET
    010020070750000000000000011100001374564401