ECO2CLD v001

ECOSTRESS Cloud Mask Daily L2 Global 70 m


PI: 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 ECO2CLD Version 1 data product provides a cloud mask that can be used to determine cloud cover for the ECO1BRAD, ECO2LSTE, ECO3ETPTJPL, ECO4ESIPTJPL, and ECO4WUE data products. The ECOSTRESS Level 2 cloud product was derived using the five calibrated thermal bands in a multispectral cloud-conservative thresholding approach for acquisitions prior to May 14, 2019. For data collected after May 15, 2019, calculations are based on data values for TIR bands 2, 4, and 5 only to accommodate direct streaming of data from the ISS as mentioned in the Known Issues section. The details of the algorithm are provided in the Algorithm Theoretical Basis Document (ATBD). The corresponding ECO1BGEO data product is required to georeference the ECO2CLD data product.

The ECO2CLD Version 1 data product contains a single cloud mask layer. Information on how to interpret the bit fields in the cloud mask is provided in section 3.1 of the User Guide.

read more

Characteristics

Collection and Granule

Collection

Characteristic Description
CollectionECOSTRESS
DOI10.5067/ECOSTRESS/ECO2CLD.001
File Size~30 KB
Temporal ResolutionVaries
Temporal Extent2018-07-09 to Present
Spatial ExtentCONUS, key biomes/agricultural zones, selected FLUXNET sites
Coordinate SystemNone (Swath)
DatumN/A
File FormatHDF5
Geographic Dimensions400 km x 400 km

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers1
Columns/Rows5400 x 5632
Pixel Size70 m

Layers

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor
Cloud Mask Cloud Mask Bit Field 8-bit unsigned integer N/A N/A 0 to 255 N/A

Cloud Mask Bit Field Descriptions

Bit Field Long Name Result
0 Cloud Mask Flag 0=not determined; 1=determined
1 Final Cloud Plus Region-growing 0=no; 1=yes
2 Final Cloud, either one of bits 2, 3 ,or 4 set 0=no; 1=yes
3 band 4 Brightness Threshold Test 0=no; 1=yes
4 Band 4-5 Thermal Difference test 0=no; 1=yes
5 Land/Water Mask 0=land; 1=water

Product Quality

Information on the quality of this product is not provided.

Known Issues

  • Data acquisition gaps: 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).

Documentation

Using the Data

Tools

Citation

DOI: 10.5067/ECOSTRESS/ECO2CLD.001

About the Image

ECOSTRESS Cloud Mask data from the ECO2CLD product over Lake Tahoe, California, Nevada, United States, acquired on March 7, 2019.

View full-size image