Monitoring spring flush of pastures using NOAA AVHRR-based NDVIs coupled with the land cover information derived from spaceborne SAR data

Monitoring spring flush of pastures using NOAA AVHRR-based NDVIs coupled with the land cover information derived from spaceborne SAR data
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使用基于 NOAA AVHRR 的 NDVI 以及源自星载 SAR 数据的土地覆盖信息来监测牧场的春水冲刷

DOI:
10.4287/jsprs.40.55
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发表时间:
2001
期刊:
影响因子:
--
通讯作者:
A. Tomita
A. Tomita
中科院分区:
--
文献类型:
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作者:
N. Mino;Y. Inoue;S. Ogawa;A. Tomita

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我们研究了结合使用基于 NOAA AVHRR 的 NDVI 和基于星载 SAR 的土地覆盖信息来监测“春潮”,即日本奶牛养殖地区草的快速生长。 SAR(JERS:7 月 17 日、8 月 30 日,ERS:1995 年 6 月 12 日)和 TM(1995 年 6 月 14 日)衍生的土地覆盖图的比较表明,JERS-1 SAR 和 ERS-1 SAR 的汇编数据在奶牛养殖景观中牧场、森林和裸地分布的分类方面取得了可接受的成功(总体一致性:77%)。春季灌溉季节(1996 年 5 月 29 日至 6 月 9 日)牧场的时间 NDVI 变化是通过线性混合模型的简单反演得到的,使用土地覆盖信息以及代表性森林和裸露的 NDVI 值以及观测到的 AVHRR NDVI 值。使用高分辨率光学数据(HRV:5 月 30 日、HRV:6 月 4 日、TM:6 月 7 日、HRV:1996 年 6 月 10 日)衍生的牧场 NDVI 进行的验证显示,牧场 NDVI 的空间和时间变化具有良好的一致性。这些结果表明,联合使用 AVHRR 和 SAR 是监测温带地区牧场短期时间变化的有效策略。需要进一步探索 GIS 数据与基于 SAR 的分类的补充数据的额外用途,以及在空间异质性更大的区域中协调多传感器数据集的应用。
We investigated the combined use of NOAA AVHRR-based NDVI and spaceborne SAR-based land cover information for monitoring of‘spring flush’, which is rapid growth of grass over Japanese dairy farming region. Comparison of SAR (JERS : 17 July, 30 August, ERS : 12 June 1995) and TM (14 June 1995) -derived land cover map showed that compiled data of JERS-1 SAR and ERS-1 SAR lead to an acceptable success (overall agreement : 77%) for classification of pasture, forest, and bare-field distribution in the dairy farming landscape. Temporal NDVI changes in pastures during the spring flush season (29 May-9 June 1996) were retrieved through the simple inversion of linear mixing modeling, using land cover information addition to the representative forest and bare's NDVI values and the observed AVHRR NDVI values. Validations with the high-resolution optical data (HRV : 30 May, HRV : 4 June, TM : 7 June, HRV : 10 June 1996) -derived pasture's NDVIs show the good agreements in spatial and temporal variety of the pasture's NDVIs. These results indicate that jointly use of AVHRR and SAR is an effective strategy for monitoring of short-period temporal change in pastures over temperate regions. Further exploration of additional uses of GIS complementally data to SAR based classification and applications with coordinated multi-sensor datasets in areas of even greater spatial heterogeneity are needed.