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.

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).

Sep 24, 2021 · 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).

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.

\[NDSI = \frac{B3-B11}{B3+B11}\] 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.

Jul 25, 2023 · 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.

Jan 1, 2014 · 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 ...

Snow Index - NDSI. Identifying snow cover is important for weather and hydrological forecasting. To detect the presence of snow, recent satellite instruments include observations at 0.66 and 1.6mm. The atmosphere is transparent at both these wavelengths, while snow is very reflective at 0.66 mm and not reflective at 1.6mm . The Normalized ...

Sep 17, 2019 · Normalized Difference Snow Index (NDSI): The Normalized Difference Snow Index (NDSI) is a numerical indicator that shows snow cover over land areas. The green and short wave infrared (SWIR) spectral bands are used within this formula to map the snow cover.

Sep 23, 2024 · The Normalized Difference Soil Index (NDSI) is an essential tool for assessing soil characteristics and their impact on crop growth. This index helps in understanding soil composition, moisture content, and overall quality.