ECOSTRESS At-sensor Calibrated Radiance Daily L1B Global 70m V001

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 globally between 52° N and 52° S latitudes. A map of the acquisition coverage can be found in figure 2 on the ECOSTRESS website(https://ecostress.jpl.nasa.gov/science). The ECO1BRAD Version 1 data product provides at-sensor calibrated radiance values retrieved for five thermal infrared (TIR) bands operating between 8 and 12.5 µm. Additionally, the digital numbers (DN) for the shortwave infrared (SWIR) band are provided. The TIR bands are spatially co-registered to produce a variable spatial resolution between 70 meters (m) to 90 m at the edge of the swath. The ECO1BRAD data product is provided as swath data and does not contain geolocation information. The corresponding ECO1BGEO (https://doi.org/10.5067/ECOSTRESS/ECO1BGEO.001) data product is required to georeference the ECO1BRAD data product. The geographic coverage of acquisitions for the ECO1BRAD Version 1 data product extends to areas outside of those indicated on the coverage map. However, corresponding higher-level products over these areas are not available at this time. The ECO1BRAD Version 1 data product contains layers of radiance values for the five TIR bands, DN values for the SWIR band, associated data quality indicators, and ancillary data. Known Issues: *Cannot perform spatial query on ECO1BRAD in NASA Earthdata Search: ECO1BRAD does not contain spatial attributes, so granules cannot be searched by geographic location. Users should search for ECO1BRAD data products by orbit number instead. *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. *Missing scan data/striping features: During testing, an instrument artifact was encountered in ECOSTRESS bands 1 and 5, resulting in missing values. A machine learning algorithm has been applied to interpolate missing values. For more information on the missing scan filling techniques and outcomes, see section 3.3.2 of the User Guide. *Scan overlap: An overlap between ECOSTRESS scans results in a clear line overlap and repeating data. Additional information is available in section 3.2 of the User Guide. *Scan flipping: Improvements to the visualization of the data to compensate for instrument orientation are discussed in section 3.4 of the User Guide. *Cold bias: ECOSTRESS Level-1 Radiance data shows high correlation with in-situ ground measurements (R2 = 0.99 in all bands). Currently, ECOSTRESS has a cold bias of approximately 0.7 Kelvin (K), which will be corrected through calibration in fu

Resources

Name Format Description Link
21 The ECOSTRESS website provides detailed information on the mission, instrument, products, etc. https://ecostress.jpl.nasa.gov/science
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.5067%2FECOSTRESS%2FECO1BRAD.001
33 The Calibration ATBD provides physical theory and mathematical procedures for the calculations used to produce the data products. https://lpdaac.usgs.gov/documents/222/ECO1B_Calibration_ATBD_V1.pdf
33 The Product Specification Document (PSD) describes the format and contents of the ECOSTRESS product. https://lpdaac.usgs.gov/documents/1321/ECO1B_PSD_V1.pdf
21 OPeNDAP provides direct access to data via HTTPS. https://opendap.cr.usgs.gov/opendap/hyrax/ECOA/ECOSTRESS/ECO1BRAD.001/contents.html
0 LP DAAC Data Pool provides direct access to available products via HTTPS. https://e4ftl01.cr.usgs.gov/ECOSTRESS/ECO1BRAD.001/
0 Earthdata Search allows users to search, discover, visualize, refine, and access NASA Earth Observation data. https://search.earthdata.nasa.gov/search?q=C1534582789-LPDAAC_ECS
21 The LP DAAC product page provides information on Science Data Set layers and links for user guides, ATBDs, data access, tools, customer support, etc. https://doi.org/10.5067/ECOSTRESS/ECO1BRAD.001
33 The technical information in the User's Guide enables users to interpret and use the data products. https://lpdaac.usgs.gov/documents/1323/ECO1B_User_Guide_V1.pdf
33 The Earthdata Search Quick Guide explains how to search ECOSTRESS data in NASA Earthdata Search. https://lpdaac.usgs.gov/documents/1573/Quick_Guide_for_Accessing_ECOSTRESS_Swath_Data_in_NASA_Earthdata_Search.pdf
33 The Geolocation ATBD provides physical theory and mathematical procedures for the calculations used to produce the data products. https://lpdaac.usgs.gov/documents/223/ECO1B_Geolocation_ATBD_V1.pdf
21 Browse image for Earthdata Search https://e4ftl01.cr.usgs.gov/WORKING/BRWS/Browse.001/2019.12.31/ECOSTRESS_L1B_RAD_08406_001_20191229T233632_0601_01.1.jpg?_ga=2.235356801.1882281295.1577729098-2066674673.1574795892
33 The Geolocation Algorithm Specification Document (ASD) describes the computer processing used to generate the ECOSTRESS geolocation product. https://lpdaac.usgs.gov/documents/226/ECO1B_Geo_ASD_V1.pdf
21 The LP DAAC website provides detailed information on discovery, distribution, access, and support of land data products. https://lpdaac.usgs.gov/
33 The Radiance Algorithm Specification Document (ASD) describes the computer processing used to generate the ECOSTRESS products. https://lpdaac.usgs.gov/documents/225/ECO1B_Rad_ASD_V1.pdf

Tags

  • infrared-wavelengths
  • spectral-engineering
  • earth-science

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