【摘要】：Himawari-8(向日葵8號)靜止氣象衛(wèi)星具有高空間分辨率、高觀測頻次和高時效特點(diǎn),在草原火災(zāi)監(jiān)測具有很強(qiáng)優(yōu)勢。提出利用Himawari-8數(shù)據(jù)的自適應(yīng)閾值火點(diǎn)監(jiān)測算法,并以2016年4月內(nèi)蒙古自治區(qū)呼倫貝爾市邊界境外草原火災(zāi)為例,重點(diǎn)利用19~20日的22個小時期間的132個時次Himawari-8數(shù)據(jù),對火情進(jìn)行連續(xù)動態(tài)監(jiān)測。結(jié)果顯示,本次火災(zāi)共持續(xù)22 h,過火區(qū)域約1 500km2,火點(diǎn)像元最長持續(xù)時間約6 h。通過分析多時次連續(xù)觀測影像和火點(diǎn)信息可知,火場在一段時間內(nèi)從西向東的蔓延速度為5.4 km/h,達(dá)到急進(jìn)地表火程度。分析表明,Himawari-8的10 min一次密集觀測頻次可實現(xiàn)快速獲取火點(diǎn)位置、面積、溫度等火情信息�？筛櫥饒鰟討B(tài)發(fā)展變化,估算火場蔓延速度和方向以及確定火場類型,提高衛(wèi)星遙感草原火監(jiān)測和預(yù)警能力。
[Abstract]:Himawari-8 (Sunflower 8) geostationary meteorological satellite has the characteristics of high spatial resolution, high observation frequency and high timeliness, and has strong advantages in grassland fire monitoring. An adaptive threshold fire point monitoring algorithm based on Himawari-8 data is proposed, and taking the grassland fire outside the border of Hulunbeir City in Inner Mongolia Autonomous region in April 2016 as an example, the Himawari-8 data from 22 hours from 19 to 20 hours are used as an example. Carry on the continuous dynamic monitoring to the fire condition. The results show that the fire lasted for 22 hours, the overfire area was about 1 500 km 2, and the longest duration of the fire pixel was about 6 h. By analyzing the multi-time continuous observation images and fire point information, it can be seen that the spreading speed of the fire field from west to east is 5.4 km/h,. The analysis shows that the 10 min intensive observation frequency of Himawari-8 can quickly obtain the fire information such as fire point position, area, temperature and so on. It can track the dynamic development of fire field, estimate the spread speed and direction of fire field, determine the type of fire field, and improve the ability of satellite remote sensing grassland fire monitoring and early warning.
【作者單位】： 國家衛(wèi)星氣象中心;
【基金】：國家重點(diǎn)研發(fā)計劃(2016YFB0501504) 公益性行業(yè)(氣象)專項(GYHY201506022) 農(nóng)業(yè)部公益性行業(yè)專項課題(200903041) 中國氣象局氣象行業(yè)標(biāo)準(zhǔn)項目(QX/T-2016-41)~~
【分類號】：S812.6
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本文編號：2489940