Exploring the effect of steep, rough topography on satellite based estimates of radiative heat flux measurements of active volcanoes

过去25年来的情况表明，火山活动热遥感是通过估计辐射热通量监测新出现和正在进行的火山活动的一个重要工具。到目前为止，不同卫星上的热传感器的空间分辨率很差，不需要对测量结果进行任何地形校正。如果不进行地形修正，估算的辐射热通量很容易被低估50%。因此，在这里，我们建议开发热遥感应用的地形校正，特别是进口的情况下，监测火山活动沿着火山陡峭的侧翼。这将有助于更准确地监测活火山。已经为可见光谱中的图像制定了几种不同的地形校正，这些将是研究的起点。我们将使用数据来测试泰特-1获得的算法。泰特-1是德国航天中心生产的一颗德国微型卫星，将于2010年10月发射。我们将通过对泰特-1在一座活火山上进行的地面辐射通量测量来验证我们的算法和结果。

Over the course of the last 25 years it has been shown that thermal remote sensing of volcanic activity is an essential tool to monitor emerging and ongoing volcanic activity by estimating radiative heat flux. So far the spatial resolution of thermal sensors on board different satellites was poor, not requiring any topographic correction of the measurements. The estimated radiative heat flux can easily be underestimated by 50% if topographic corrections are not applied. Here we therefore propose to develop topographical corrections for thermal remote sensing applications, being especially import in the context of monitoring volcanic activity along the steep flanks of volcanoes. This will allow monitoring of active volcanoes with greater accuracy. Several different topographic corrections have already been developed for the imagery in the visible spectrum and those will be the starting point for the research. We will use data to test our algorithms acquired by TET-1. TET-1 is a German micro satellite produced by DLR that will be launched in October 2010. We will validate our algorithms and results by ground based measurements of the radiant flux carried out on an active volcano during the overpass of TET-1.