In this study, an algorithm that combines MODIS Terra and Aqua (500 m) and the Interactive Multisensor Snow and Ice Mapping System (IMS) (4 km) is presented to provide a daily cloud-free snow-cover product (500 m), namely Terra-Aqua-IMS (TAI). The overall accuracy of the new TAI is 92.3% as compared with ground stations in all-sky conditions; this value is significantly higher than the 63.1% of the blended MODIS Terra-Aqua product and the 54.6% and 49% of the original MODIS Terra and Aqua products, respectively. Without the IMS, the daily combination of MODIS Terra-Aqua over the Tibetan Plateau (TP) can only remove limited cloud contamination: 37.3% of the annual mean cloud coverage compared with the 46.6% (MODIS Terra) and 55.1% (MODIS Aqua). The resulting annual mean snow cover over the TP from the daily TAI data is 19.1%, which is similar to the 20.6% obtained from the 8-day MODIS Terra product (MOD10A2) but much larger than the 8.1% from the daily blended MODIS Terra-Aqua product due to the cloud blockage.

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Zhang, G. (2021). Daily cloud-free snow composite products from MODIS Terra-Aqua and IMS for the Tibetan Plateau (2004-2013). A Big Earth Data Platform for Three Poles, DOI: 10.11888/Geogra.tpdc.271232. CSTR: 18406.11.Geogra.tpdc.271232. (Download the reference： RIS | Bibtex )

Related Literatures:

1. Yu, J., Zhang*, G., Yao, T., Xie, H., Zhang, H., Ke, C., and Yao, R., (2016). Developing daily cloud-free snow composite products from MODIS Terra-Aqua and IMS for the Tibetan Plateau, IEEE Transactions on Geoscience and Remote Sensing, 54(4), 2171−2180, doi: 10.1109/TGRS.2015.2496950( View Details | Download | Bibtex)

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