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Description

The Multi-Source Land Surface Phenology (LSP) Yearly North America 30 meter (m) Version 1.1 product (MSLSP) provides a Land Surface Phenology product for North America derived from Harmonized Landsat Sentinel-2 (HLS) data. Data from the combined Landsat 8 Operational Land Imager (OLI) and Sentinel-2A and 2B Multispectral Instrument (MSI) provides the user community with dates of phenophase transitions, including the timing of greenup, maturity, senescence, and dormancy at 30m spatial resolution. These data sets are useful for a wide range of applications, including ecosystem and agro-ecosystem modeling, monitoring the response of terrestrial ecosystems to climate variability and extreme events, crop-type discrimination, and land cover, land use, and land cover change mapping.

Provided in the MSLSP product are layers for percent greenness, onset greenness dates, Enhanced Vegetative Index (EVI2) amplitude, and maximum EVI2, and data quality information for up to two phenological cycles per year. For areas where the data values are missing due to cloud cover or other reasons, the data gaps are filled with good quality values from the year directly preceding or following the product year. A low resolution browse image representing maximum EVI is also available for each MSLSP30NA granule.

Known Issues

  • Data are sparse in 2016 and early 2017, as Sentinel-2B was not yet launched, and Sentinel-2A was not fully operational, leading to poorer quality retrievals of phenology in 2016 and 2017. However, poor quality pixels can be masked with Quality Assurance (QA) flags.
  • Disturbance has not been explicitly accounted for or mapped, which can lead to premature detections of senescence and dormancy when sharp spectral changes occur.
  • Pixels with more than two growth cycles per year (e.g., alfalfa fields) may not be accurately characterized, especially if they occur in rapid succession.

Improvements/Changes from Previous Version

  • Modest changes were made to the spline fitting algorithm used to estimate the MSLSP30NA product in V011. Only gaps greater than 20 days were filled using observations from the outside of the target year to reduce the computational burden. Sensitivity analyses demonstrated that this change had negligible impact on product results.
  • The Quality Assurance (QA) fields were updated to reflect the changes in the gap-filling. Version 1 included QA values from 1-7, whereas Version 1.1 includes QA values from 1-6, 9, and 10.
  • Peak date corresponding to the maximum EVI2 value in a growth cycle (Peak and Peak_2) and number of days with clear observations in calendar year (numObS) layers were added.

Version Description

This is version one of the MSLSP30NA dataset.

Product Summary

Platforms
LANDSAT-8,
Sentinel-2A,
Sentinel-2B
Instruments
OLI,
Sentinel-2 MSI
Spatial Extent
N: 90 W: -180
Spatial Resolution
30 Meters x 30 Meters
Geographic Region
NORTH AMERICA
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2016-01-01 to 2019-12-31
Temporal Resolution
1 Year
Data Partner
Land Processes Distributed Active Archive Center (LP DAAC)
Land Cover and Surface Climate Group, Department of Earth and Environment, Boston University (BU/EE/LCSC)
Concept ID
C2102664483-LPDAAC_ECS
Data State
COMPLETE
Processing Level
3
Published
Science Keywords
Plant Phenology,
Land Use/Land Cover

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Friedl, M. (2021). MuSLI Multi-Source Land Surface Phenology Yearly North America 30 m V011 [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/COMMUNITY/MUSLI/MSLSP30NA.011 Date Accessed: 2025-10-29

Documents

Publications Citing This Dataset

Variables

Variables are a set of physical properties whose values determine the characteristics or behavior of something. For example, temperature and pressure are variables of the atmosphere. Parameters and variables can be used interchangeably. Variable level attributes provide individual information for each variable.

The Name in this table is the variable name. Fill value indicates missing or undefined data points in a variable. Valid range is the range of values the variable can store. Scale factor is used to increase or decrease the size of an object and can be used to correct for distortion. For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
50PCGD 50 Percent Greenness Decrease (Date of 50% greenness decrease) Day int16 32767 32767 to 548 N/A
50PCGI 50 Percent Greenness Increase (Date of 50% greenness increase) Day int16 32767 32767 to 548 N/A
50PCGI_2 Cycle 2 - 50 Percent Greenness Increase (Date of 50% greenness increase) Day int16 32767 32767 to 548 N/A
50PGCD_2 Cycle 2 - 50 Percent Greenness Decrease (Date of 50% greenness decrease) Day int16 32767 32767 to 548 N/A
EVIamp EVI2 Amplitutde during vegetation cycle N/A int16 32767 32767 to 10000 0.0001
EVIamp_2 Cycle 2 - EVI2 Amplitutde during vegetation cycle N/A int16 32767 32767 to 10000 0.0001
EVIarea Integrated EVI2 during vegetative cycle N/A int16 32767 32767 to 32766 0.01
EVIarea_2 Cycle 2 - Integrated EVI2 during vegetative cycle N/A int16 32767 32767 to 32766 0.01
EVImax Maximum EVI2 during vegetation cycle N/A int16 32767 32767 to 10000 0.0001
EVImax_2 Cycle 2 - Maximum EVI2 during vegetation cycle N/A int16 32767 32767 to 10000 0.0001
gdownQA Quality Assurance for Greendown Segment N/A int16 32767 32767 to 7 N/A
gdownQA_2 Cycle 2 - Quality Assurance for Greendown Segment N/A int16 32767 32767 to 7 N/A
gupQA Quality Assurance for Greenup Segment N/A int16 32767 32767 to 7 N/A
gupQA_2 Cycle 2 - Quality Assurance for Greenup Segment N/A int16 32767 32767 to 7 N/A
NumCycles Number of phenological cycles Number int16 32767 32767 to 6 N/A
numObs Number of days with clear observations in calendar year Number int16 32676 32676 to 366 N/A
OGD Onset Greenness Decrease (Date 10% greenness decrease) Day int16 32767 32767 to 548 N/A
OGD_2 Cycle 2 - Onset Greenness Decrease (Date 10% greenness decrease) Day int16 32767 32767 to 548 N/A
OGI Onset Greenness Increase (Date of 15% greenness increase) Day int16 32767 32767 to 548 N/A
OGI_2 Cycle 2 - Onset Greenness Increase (Date of 15% greenness increase) Day int16 32767 32767 to 548 N/A
OGMn Onset Greenness Minimum (Date of 85% greenness decrease) Day int16 32767 32767 to 548 N/A
OGMn_2 Cycle 2 - Onset Greenness Minimum (Date of 85% greenness decrease) Day int16 32767 32767 to 548 N/A
OGMx Onset Greenness Maximum (Date of 90% greenness increase) Day int16 32767 32767 to 548 N/A
OGMx_2 Cycle 2 - Onset Greenness Maximum (Date of 90% greenness increase) Day int16 32767 32767 to 548 N/A
Peak Date of Cycle Peak Day int16 32767 32767 to 366 N/A
Peak_2 Cycle 2 - Date of Cycle Peak Day int16 32676 32676 to 366 N/A
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