ECO_L2T_LSTE v002

ECOSTRESS Tiled Land Surface Temperature and Emissivity Instantaneous L2 Global 70 m


PI: Simon Hook, Glynn Hulley

Description

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 over the conterminous United States (CONUS) 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 3 available bands, accuracy may be affected when compared to the LST data that utilized all 5 bands.

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Characteristics

Collection and Granule

Collection

Characteristic Description
CollectionECOSTRESS
DOI10.5067/ECOSTRESS/ECO_L2T_LSTE.002
File Size~30 MB
Temporal ResolutionVaries
Temporal Extent2018-07-09 to Present
Spatial ExtentCONUS, key biomes/agricultural zones, selected FLUXNET sites
Coordinate SystemUniversal Transverse Mercator (UTM)
DatumWorld Geodetic System (WGS84)
File FormatGeoTIFF
Geographic Dimensions109.8 km x 109.8 km

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers7
Columns/Rows1568 x 1568
Pixel Size70 m

Layers

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor Offset
LST Land Surface Temperature Kelvin 32-bit floating point N/A N/A N/A N/A N/A
LST_err Land Surface Temperature error Kelvin 32-bit floating point N/A N/A N/A N/A N/A
EmisWB Wide Band Emissivity N/A 32-bit floating point N/A N/A 0 to 1 N/A 0.49
height Surface elevation of observation Meters 32-bit floating point N/A N/A N/A N/A N/A
QC Quality Control for LST and emissivity Bit Field 16-bit unsigned integer N/A N/A 0 to 65535 N/A N/A
cloud Cloud mask N/A 8-bit unsigned integer N/A N/A 0, 1 N/A N/A
water Water mask N/A 8-bit unsigned integer N/A N/A 0, 1 N/A N/A

Cloud Mask Values

Class Description
0 Clear
1 Cloudy

Water Mask Values

Class Description
0 Land
1 Water

Product Quality

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.

Known Issues

  • 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).

  • 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.

  • The User Guide for this product lists a view_zenith layer which is not included in the current version of this product.


About the image

ECOSTRESS land surface temperature data from the ECO_L2T_LSTE product over Nevada, United States, acquired on October 29, 2022.

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Documentation

User Guide
Algorithm Theoretical Basis Document (ATBD)
Product Specification Document (PSD)
Algorithm Specification Document (ASD)

Using the Data

Access Data

Citation

DOI: 10.5067/ECOSTRESS/ECO_L2T_LSTE.002