ECOSTRESS Cloud Confidence Mask data from the ECO_L2G_CLOUD product over Mount Saint Helens, Washington, United States, acquired on December 15, 2022.
View full-size imageThe ECOsystem Spaceborne Thermal Radiometer Experiment on Space Station (ECOSTRESS) mission measures the temperature of plants to better understand how much water plants need and how they respond to stress. ECOSTRESS is attached to the International Space Station (ISS) and collects data globally as well as key biomes and agricultural zones around the world and selected FLUXNET validation sites. A map of the acquisition coverage can be found on the ECOSTRESS website.
The ECOSTRESS Gridded Cloud Mask Instantaneous L2 Global 70 m (ECO_L2G_CLOUD) Version 2 data product is derived using a single-channel Bayesian cloud threshold with a look-up-table (LUT) approach. The ECO_L2G_CLOUD product provides a cloud mask that can be used to determine cloud cover for accurate land surface temperature and evapotranspiration estimation. This data product is a gridded version of the ECO_L2_CLOUD Version 2 product that was resampled using nearest neighbor, projected to a globally snapped 0.0006° grid, and repackaged as the ECO_L2G_CLOUD Version 2 data product.
The ECO_L2G_CLOUD Version 2 data product contains two cloud mask layers: cloud confidence and final cloud mask. Information on how to interpret the cloud confidence and cloud mask layers is provided in Table 7 of the ECO_L2_CLOUD Version 2 User Guide.
| Characteristic | Description |
|---|---|
| Collection | ECOSTRESS |
| DOI | 10.5067/ECOSTRESS/ECO_L2G_CLOUD.002 |
| File Size | ~1 MB |
| Temporal Resolution | Varies |
| Temporal Extent | 2018-07-09 to Present |
| Spatial Extent | Global (+/- 52 degrees latitude) |
| Coordinate System | Geographic Latitude and Longitude |
| Datum | World Geodetic System (WGS84) |
| File Format | HDF5 |
| Geographic Dimensions | 400 km x 400 km |
| Characteristic | Description |
|---|---|
| Number of Science Dataset (SDS) Layers | 2 |
| Columns/Rows | 5400 x 5632 |
| Pixel Size | 70 m |
| SDS Name | Description | Units | Data Type | Fill Value | No Data Value | Valid Range | Scale Factor |
|---|---|---|---|---|---|---|---|
| Cloud_confidence | Cloud confidence | N/A | 8-bit unsigned integer | 255 | N/A | 0 to 3 | N/A |
| Cloud_final | Final cloud mask | N/A | 8-bit unsigned integer | 255 | N/A | 0, 1 | N/A |
| Class | Description |
|---|---|
| 0 | Confident Clear |
| 1 | Probably Clear |
| 2 | Probably Cloudy |
| 3 | Confident Cloudy |
| Class | Description |
|---|---|
| 0 | Clear |
| 1 | Cloudy |
Information on the quality of this product is not provided.
Data acquisition gap: ECOSTRESS was launched on June 29, 2018, and moved to autonomous science operations on August 20, 2018, following a successful in-orbit checkout period. On September 29, 2018, ECOSTRESS experienced an anomaly with its primary mass storage unit (MSU). ECOSTRESS has a primary and secondary MSU (A and B). On December 5, 2018, the instrument was switched to the secondary MSU and science operations resumed. On March 14, 2019, the secondary MSU experienced a similar anomaly, temporarily halting science acquisitions. On May 15, 2019, a new data acquisition approach was implemented, and science acquisitions resumed. To optimize the new acquisition approach TIR bands 2, 4, and 5 are being downloaded. The data products are as previously, except the bands not downloaded contain fill values (L1 radiance and L2 emissivity). This approach was implemented from May 15, 2019, through April 28, 2023.
Data acquisition gap: From February 8 to February 16, 2020, an ECOSTRESS instrument issue resulted in a data anomaly that created striping in band 4 (10.5 micron). These data products have been reprocessed and are available for download. No ECOSTRESS data were acquired on February 17, 2020, due to the instrument being in SAFEHOLD. Data acquired following the anomaly have not been affected.
Data acquisition: ECOSTRESS has now successfully returned to 5-band mode after being in 3-band mode since 2019. This feature was successfully enabled following a Data Processing Unit firmware update (version 4.1) to the payload on April 28, 2023. To better balance contiguous science data scene variables, 3-band collection is currently being interleaved with 5-band acquisitions over the orbital day/night periods.