The C2 NDSI science product is the normalized difference between spectral bands green (G) and the shortwave infrared (SWIR). The NDSI is particularly useful for separating snow from vegetation, soils, and lithology endmembers.

NDSI is the normalized difference between spectral bands green (G) and shortwave infrared (SWIR). NDSI is useful for separating snow from vegetation, soils, and other spectral signatures, and is delivered as a single band.

2021年9月24日 · NDSI is a measure of the relative magnitude of the reflectance difference between visible (green) and shortwave infrared (SWIR). It controls variance of two bands (one in the near infrared or short-wave infrared and another one in the visible parts of the spectrum).

The Normalized Difference Snow Index (NDSI) snow cover is an index that is related to the presence of snow in a pixel and is a more accurate description of snow detection as compared to Fractional Snow Cover (FSC).

\[NDSI = \frac{B3-B11}{B3+B11}\] The Sentinel-2 normalized difference snow index is a ratio of two bands: one in the VIR (Band 3) and one in the SWIR (Band 11). Values above 0.42 are usually snow. More info here.

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2023年7月25日 · NDSI usually ranges from -5 to 1, with ~0.5 to 1 representing snow cover. Time series and anomaly maps of NDSI clearly show changes in snow cover for a region. Positive anomalies indicate increased snow cover, whereas negative anomalies indicate decreased snow cover relative to average conditions.

2014年1月1日 · Normalized-Difference Snow Index (NDSI) – normalized difference of two bands (one in the visible and one in the near-infrared or short-wave infrared parts of the spectrum) is used to map snow. Snow is highly reflective in the visible part of the EM spectrum and highly absorptive in the near-infrared or short-wave infrared part of the spectrum ...

2013年8月25日 · The Normalized-Difference Snow Index (NDSI) has a long history. 'The use of ratioing visible (VIS) and near-infrared (NIR) or short-wave infrared (SWIR) channels to separate snow and clouds was documented in the literature beginning in the mid-1970s.

2021年10月27日 · 归一化差异岩石指数（NDSI）是一种用于识别和提取岩石的遥感指数。它使用可见光波段和近红外波段之间的差异来区分岩石和其他地表覆盖类型。NDSI的公式如下： NDSI = (Green - NIR) / (Green + NIR) 其中，Green...