המוצר MCD15A3H Version 6.1 Moderate Resolution Imaging Spectroradiometer (MODIS) Level 4, Combined Fraction of Photosynthetically Active Radiation (FPAR), and Leaf Area Index (LAI) הוא מערך נתונים מורכב של 4 ימים עם גודל פיקסל של 500 מטר. האלגוריתם בוחר את הפיקסל הכי טוב מכל הנתונים שנאספו על ידי שני חיישני MODIS שנמצאים בלוויינים Terra ו-Aqua של נאס"א, במהלך תקופה של 4 ימים.
המוצר MCD15A3H Version 6.1 Moderate Resolution Imaging Spectroradiometer (MODIS) Level 4, Combined Fraction of Photosynthetically Active Radiation (FPAR), and Leaf Area Index (LAI) הוא מערך נתונים מורכב של 4 ימים עם גודל פיקסל של 500 מטר. האלגוריתם בוחר את הפיקסל הכי טוב מכל הנתונים שנאספו משני חיישני MODIS…
[null,null,[],[[["\u003cp\u003eMCD15A3H V6.1 provides a 4-day composite of global Leaf Area Index (LAI) and Fraction of Photosynthetically Active Radiation (FPAR) data at 500m resolution.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset utilizes data from both MODIS sensors on NASA's Terra and Aqua satellites, selecting the best pixel within the 4-day period.\u003c/p\u003e\n"],["\u003cp\u003eLAI represents the one-sided green leaf area per unit ground area, while FPAR quantifies the fraction of photosynthetically active radiation absorbed by vegetation.\u003c/p\u003e\n"],["\u003cp\u003eData quality information is provided through separate bands indicating cloud state, sensor, and retrieval algorithm details for both LAI and FPAR.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is freely available for use, redistribution, and sale through the NASA Land Processes Distributed Active Archive Center (LP DAAC).\u003c/p\u003e\n"]]],[],null,["Dataset Availability\n: 2002-07-04T00:00:00Z--2025-08-21T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA LP DAAC at the USGS EROS Center](https://doi.org/10.5067/MODIS/MCD15A3H.061)\n\nCadence\n: 4 Days\n\nTags\n:\n [fpar](/earth-engine/datasets/tags/fpar) [global](/earth-engine/datasets/tags/global) [lai](/earth-engine/datasets/tags/lai) [modis](/earth-engine/datasets/tags/modis) [nasa](/earth-engine/datasets/tags/nasa) [plant-productivity](/earth-engine/datasets/tags/plant-productivity) [usgs](/earth-engine/datasets/tags/usgs) [vegetation](/earth-engine/datasets/tags/vegetation) \n 4-day \nmcd15a3h \n\nDescription \nThe MCD15A3H Version 6.1 Moderate Resolution Imaging Spectroradiometer (MODIS) Level 4, Combined Fraction of Photosynthetically Active Radiation (FPAR), and Leaf Area Index (LAI) product is a 4-day composite data set with 500 meter pixel size. The algorithm chooses the best pixel available from all the acquisitions of both MODIS sensors located on NASA's Terra and Aqua satellites from within the 4-day period.\n\nDocumentation:\n\n- [User's Guide](https://lpdaac.usgs.gov/documents/624/MOD15_User_Guide_V6.pdf)\n\n- [Algorithm Theoretical Basis Document (ATBD)](https://lpdaac.usgs.gov/documents/90/MOD15_ATBD.pdf)\n\n- [General Documentation](https://ladsweb.modaps.eosdis.nasa.gov/filespec/MODIS/61/MCD15A3H)\n\nBands\n\n\n**Pixel Size**\n\n500 meters\n\n**Bands**\n\n| Name | Min | Max | Scale | Pixel Size | Wavelength | Description |\n|----------------|-----|-----|-------|------------|------------|----------------------------------------------------------------------------------------------------------------------------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `Fpar` | 0 | 100 | 0.01 | meters | 400-700nm | FPAR absorbed by the green elements of a vegetation canopy |\n| `Lai` | 0 | 100 | 0.1 | meters | None | One-sided green leaf area per unit ground area in broadleaf canopies; one-half the total needle surface area per unit ground area in coniferous canopies |\n| `FparLai_QC` | | | | meters | None | Quality for Lai and Fpar |\n| Bitmask for FparLai_QC - Bit 0: MODLAND_QC bits - 0: Good quality (main algorithm with or without saturation) - 1: Other quality (back-up algorithm or fill values) - Bit 1: Sensor - 0: Terra - 1: Aqua - Bit 2: Dead detector - 0: Detectors apparently fine for up to 50% of channels 1, 2 - 1: Dead detectors caused \\\u003e50% adjacent detector retrieval - Bits 3-4: Cloud state - 0: Significant clouds NOT present (clear) - 1: Significant clouds WERE present - 2: Mixed cloud present in pixel - 3: Cloud state not defined, assumed clear - Bits 5-7: SCF_QC - 0: Main (RT) method used with no saturation, best result possible - 1: Main (RT) method used with saturation, good and very usable - 2: Main (RT) method failed due to bad geometry, empirical algorithm used - 3: Main (RT) method failed due to problems other than geometry, empirical algorithm used - 4: Pixel not produced at all, value couldn''t be retrieved (possible reasons: bad L1B data, unusable MOD09GA data) ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n| `FparExtra_QC` | | | | meters | None | Extra detail quality for LAI and FPAR |\n| Bitmask for FparExtra_QC - Bits 0-1: Land-sea pass-thru - 0: LAND - 1: SHORE - 2: FRESHWATER - 3: OCEAN - Bit 2: Snow ice - 0: No snow/ice detected - 1: Snow/ice detected - Bit 3: Aerosol - 0: No or low atmospheric aerosol levels detected - 1: Average or high aerosol levels detected - Bit 4: Cirrus - 0: No cirrus detected - 1: Cirrus detected - Bit 5: Internal cloud mask - 0: No clouds - 1: Clouds were detected - Bit 6: Cloud shadow - 0: No cloud shadow detected - 1: Cloud shadow detected - Bit 7: SCF biome mask - 0: Biome outside interval \\\u003c1,4\\\u003e - 1: Biome in interval \\\u003c1,4\\\u003e ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n| `FparStdDev` | 0 | 100 | 0.01 | meters | None | Standard deviation of Fpar |\n| `LaiStdDev` | 0 | 100 | 0.1 | meters | None | Standard deviation for Lai |\n\nTerms of Use\n\n**Terms of Use**\n\nMODIS data and products acquired through the LP DAAC\nhave no restrictions on subsequent use, sale, or redistribution.\n\nCitations \nCitations:\n\n- Please visit [LP DAAC 'Citing Our Data' page](https://lpdaac.usgs.gov/citing_our_data)\n for information on citing LP DAAC datasets.\n\nDOIs\n\n- \u003chttps://doi.org/10.5067/MODIS/MCD15A3H.061\u003e\n\nExplore with Earth Engine **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine)\n\nCode Editor (JavaScript) \n\n```javascript\nvar dataset = ee.ImageCollection('MODIS/061/MCD15A3H');\nvar defaultVisualization = dataset.first().select('Fpar');\nvar defaultVisualizationVis = {\n min: 0.0,\n max: 100.0,\n palette: ['e1e4b4', '999d60', '2ec409', '0a4b06'],\n};\nMap.setCenter(6.746, 46.529, 6);\nMap.addLayer(\n defaultVisualization, defaultVisualizationVis, 'Default visualization');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/MODIS/MODIS_061_MCD15A3H) \n[MCD15A3H.061 MODIS Leaf Area Index/FPAR 4-Day Global 500m](/earth-engine/datasets/catalog/MODIS_061_MCD15A3H) \nThe MCD15A3H Version 6.1 Moderate Resolution Imaging Spectroradiometer (MODIS) Level 4, Combined Fraction of Photosynthetically Active Radiation (FPAR), and Leaf Area Index (LAI) product is a 4-day composite data set with 500 meter pixel size. The algorithm chooses the best pixel available from all the acquisitions of both MODIS sensors ... \nMODIS/061/MCD15A3H, fpar,global,lai,modis,nasa,plant-productivity,usgs,vegetation \n2002-07-04T00:00:00Z/2025-08-21T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.5067/MODIS/MCD15A3H.061](https://doi.org/https://doi.org/10.5067/MODIS/MCD15A3H.061)\n- [https://doi.org/10.5067/MODIS/MCD15A3H.061](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/MODIS_061_MCD15A3H)"]]
