ECOSTRESS land surface temperature data from the ECO_L2T_LSTE product over Nevada, United States, acquired on October 29, 2022.View full-size image
The 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 Tiled Land Surface Temperature and Emissivity Instantaneous Level 2 Global 70 m (ECO_L2T_LSTE) Version 2 data product provides atmospherically corrected land surface temperature and emissivity (LST&E) values derived from five thermal infrared (TIR) bands. The ECO_L2T_LSTE data product was derived using a physics-based Temperature and Emissivity Separation (TES) algorithm. This tiled data product is subset from the ECO_L2G_LSTE data product using a modified version of the Military Grid Reference System (MGRS) which divides Universal Transverse Mercator (UTM) zones into square tiles that are 109.8 km by 109.8 km with a 70 meter (m) spatial resolution.
The ECO_L2T_LSTE Version 2 data product is provided in Cloud Optimized GeoTIFF (COG) format, and each band is distributed as a separate COG. This product contains seven layers including LST, LST error, wideband emissivity, quality flags, height, and cloud and water masks. For acquisitions after May 15, 2019, data products contain data values for TIR bands 2, 4, and 5 only. TIR bands 1 and 3 contain fill values to accommodate direct streaming of data from the ISS, as mentioned in the Known Issues section. LST data generated after May 15, 2019 will only use the three available bands, accuracy may be affected when compared to the LST data that utilized all five bands.
|File Size||~30 MB|
|Temporal Extent||2018-07-09 to Present|
|Spatial Extent||Global (+/- 52 degrees latitude)|
|Coordinate System||Universal Transverse Mercator (UTM)|
|Datum||World Geodetic System (WGS84)|
|Geographic Dimensions||109.8 km x 109.8 km|
|Number of Science Dataset (SDS) Layers||7|
|Columns/Rows||1568 x 1568|
|Pixel Size||70 m|
|SDS Name||Description||Units||Data Type||Fill Value||No Data Value||Valid Range||Scale Factor|
|LST||Land Surface Temperature||Kelvin||32-bit floating point||NaN||N/A||N/A||N/A|
|LST_err||Land Surface Temperature error||Kelvin||32-bit floating point||NaN||N/A||N/A||N/A|
|EmisWB||Wide Band Emissivity||N/A||32-bit floating point||NaN||N/A||0 to 1||N/A|
|height||Surface elevation of observation||Meters||32-bit floating point||NaN||N/A||N/A||N/A|
|QC||Quality Control for LST and emissivity||Bit Field||16-bit unsigned integer||N/A||N/A||N/A||N/A|
|cloud||Cloud mask||N/A||8-bit unsigned integer||N/A||N/A||0, 1||N/A|
|water||Water mask||N/A||8-bit unsigned integer||N/A||N/A||0, 1||N/A|
Quality information for this product, including the bit definition index for the quality layer, is obtained from the ECO_L2_LSTE product, and is provided in Section 2.4 of the ECO_L2_LSTE User Guide.
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 is now routinely acquiring and downlinking all 5-bands of thermal infrared data for the first time since the loss of both on-board Mass Storage Units in 2018 and 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.