Soil Humidity in Luxembourg - daily measurements

Soil moisture data covering the whole area of Luxembourg for the first 1-2 cm, as well as 5-10 cm soil depth:

- C and X band for the first 1-2 cm soil depth.
- L-band for the first 5-10 cm of soil depth.

with a resolution of 100 x 100 m per pixel and with a temporal resolution of "once per day" and an average number of 280 images per year images per year (as a combination of C, X and L-band sources)

### Details
| Product | Unit | Sensing Depth | Pixel size * | Temporal resolution |
|---|---|---|---|---|---|
| Volumetric Soil Moisture L-Band (SM) | m3/m3 | 5cm | 100x100m, 0.000888888888889 degree | 230 observations per year at 52 degree lat. |
| Volumetric Soil Moisture C-Band (SM) | m3/m3 | 2cm | 100x100m, 0.000888888888889 degree | 320 observations per year at 52 degree lat. |
| Volumetric Soil Moisture X-Band (SM) | m3/m3 | 1cm | 100x100m, 0.000888888888889 degree | 320 observations per year at 52 degree lat. |
\* pixel size is given as a number in meters. This is an approximate size as the data itself is stored in decimal degrees (WGS84). The actual size in decimal degrees is given in the description of each data product.

### Description of the files
Every file name encodes the characteristics of the file:

- **SM-SMAP-LN-DESC:** Volumetric Soil Moisture L-band (SM) / Satellite observed volumetric soil moisture derived from L-band microwave data in combination with other bands. It is based on VanderSat's patented high-resolution technology and provides **soil moisture of the top 5 cm of the soil** depending on moisture conditions. VanderSat’s L-band data is retrieved from the **SMAP satellite**.
- **SM-AMSR2-C1N-DESC:** Volumetric Soil Moisture C-band (SM) / Satellite observed volumetric soil moisture derived from C-band microwave data in combination with other bands. It is based on VanderSat's patented high-resolution technology and provides **top soil soil moisture of the top 2 cm of the soil** depending on moisture conditions. VanderSat's C-band soil moisture is **derived from the Advanced Microwave Scanning Radiometer 2 (AMSR2) on board the GCOM-W1 satellite** as well the Advanced Microwave Scanning Radiometer - EOS (AMSRE) on board the AQUA satellite.
- **SM-AMSRE-C1N-DESC:** Volumetric Soil Moisture C-band (SM) / Satellite observed volumetric soil moisture derived from C-band microwave data in combination with other bands. It is based on VanderSat's patented high-resolution technology and provides **top soil soil moisture of the top 2 cm of the soil** depending on moisture conditions. VanderSat's C-band soil moisture is **derived from** the Advanced Microwave Scanning Radiometer 2 (AMSR2) on board the GCOM-W1 satellite as well the **Advanced Microwave Scanning Radiometer - EOS (AMSRE) on board the AQUA satellite**.
- **SM-AMSR2-XN-DESC:** Volumetric Soil Moisture X-band (SM) / Satellite observed volumetric soil moisture derived from X-band microwave data in combination with other bands. It is based on VanderSat's patented high-resolution technology and provides **top soil soil moisture of the top 1 cm of the soil** depending on moisture conditions. VanderSat's X-band soil moisture is **derived from the Advanced Microwave Scanning Radiometer 2 (AMSR2) on board the GCOM-W1 satellite**, the Advanced Microwave Scanning Radiometer - EOS (AMSRE) on board the AQUA satellite and the GMI sensor on board the Global Precipitation Measurement (GPM) satellite.
- **SM-AMSRE-XN-DESC:** Volumetric Soil Moisture X-band (SM) / Satellite observed volumetric soil moisture derived from X-band microwave data in combination with other bands. It is based on VanderSat's patented high-resolution technology and provides **top soil soil moisture of the top 1 cm of the soil** depending on moisture conditions. VanderSat’s X-band soil moisture is **derived from** the Advanced Microwave Scanning Radiometer 2 (AMSR2) on board the GCOM-W1 satellite, the Advanced Microwave Scanning Radiometer EOS (AMSRE) on board the AQUA satellite and the GMI sensor on board the Global Precipitation Measurement (GPM) satellite.

All the files starting with "QF-" contain the data flags related to the corresponding data.

### Technical details
GeoTIFF images are provided for the following extent (WGS84 latitude/longitude):
Extent (minx, miny, maxx, maxy) = 5.7, 49.4, 6.58, 50.23
This corresponds to a number of 981 x 917 pixel

| Parameter | Value |
| --- | --- |
| Data type | uint16 |
| Compression | LZW |
| Scale | 0.001 |
| Offset | 0 |
| Band 1 | Soil moisture |
| Band 2 | Data marked as unreliable |
| NoData | 65535 |

We have archived similar measurements on the period 2002-2022 in the following dataset: [Soil Humidity in Luxembourg 2002-2022](https://data.public.lu/fr/datasets/soil-humidity-in-luxembourg-2002-2022/)