Prospection and Monitoring of the Archaeological Heritage of Nasca, Peru, with ENVISAT ASAR
Prospection and Monitoring of the Archaeological Heritage of Nasca, Peru, with ENVISAT ASAR
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使用 ENVISAT ASAR 对秘鲁纳斯卡的考古遗产进行勘探和监测
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
R. Lasaponara
中科院分区：
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作者：
D. Tapete;F. Cigna;N. Masini;R. Lasaponara
采用Cigna et al. （2013, this issue）提出的基于合成孔径雷达（SAR）振幅信息的处理方法，从ENVISAT高级SAR （ASAR）场景中提取后向散射系数σ0，对秘鲁南部纳斯卡地区考古遗迹进行调查。利用2003-2007年的平均后向散射和σ0时间序列，对纳斯卡线中一些最著名的群体以及卡瓦奇仪式中心的土坯结构进行了研究，从而识别了干旱和裸露土壤上的人为特征。尽管由于ASAR场景的中等空间分辨率（~30 m）而受到预期的限制，但仍检测到与纳斯卡古渡槽系统（puquios）有关的一些特征，并通过幅度变化检测图和σ0时间序列推断出水位变化。基于SAR的勘探结果还与2003年、2004年和2007年先进星载热发射和反射辐射计（ASTER）数据得出的植被指数进行了比较。在Cahuachi和邻近的考古土丘上观察到的变化，然后根据遗址最近的保护历史和当代考古发掘进行讨论。该研究为常规使用SAR数据在（半）干旱和沙漠地区进行考古勘探和状态监测开辟了有趣的前景。版权所有©2013 John Wiley & Sons， Ltd
The processing method based on synthetic aperture radar (SAR) amplitude information presented by Cigna et al. (2013, this issue) was used to extract the backscattering coefficient (σ0) from ENVISAT advanced SAR (ASAR) scenes to investigate the archaeological heritage of the Nasca region, southern Peru. Average backscattering and σ0 time series in 2003–2007 were obtained for some of the most famous groups of the Nazca Lines, as well as for the adobe structures of the Ceremonial Centre of Cahuachi, and allowed the recognition of anthropogenic features on arid and bare soil. Despite the expected constraints due to the medium spatial resolution of the ASAR scenes (~30 m), some features related to the Nasca ancient aqueduct systems (puquios) were detected, and water level changes were inferred from amplitude change detection maps and σ0 time series. The SAR‐based prospection results were also compared with a vegetation index derived from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data for 2003, 2004 and 2007. The changes observed over Cahuachi and the neighbouring archaeological mounds are then discussed in light of the recent conservation history of the site and the contemporary archaeological excavations. The research opens interesting perspectives for routine use of SAR data for purposes of archaeological prospection and condition monitoring in (semi‐)arid and desert regions. Copyright © 2013 John Wiley & Sons, Ltd.