MOD17A2H V6.1 ग्रॉस प्राइमरी प्रॉडक्टिविटी (जीपीपी) प्रॉडक्ट, आठ दिनों का कंपोज़िट है. इसका पिक्सल साइज़ 500 मीटर है. यह प्रॉडक्ट, रेडिएशन-यूज़ एफिशिएंसी के सिद्धांत पर आधारित है. इसका इस्तेमाल, डेटा मॉडल में इनपुट के तौर पर किया जा सकता है. इससे, ज़मीन की ऊर्जा, कार्बन, जल चक्र की प्रक्रियाओं, और वनस्पति की जैवभू-रसायन का हिसाब लगाया जा सकता है.
MOD17A2H V6.1 ग्रॉस प्राइमरी प्रॉडक्टिविटी (जीपीपी) प्रॉडक्ट, आठ दिनों का कंपोज़िट है. इसमें पिक्सल का साइज़ 500 मीटर है. यह प्रॉडक्ट, रेडिएशन-यूज़ एफिशिएंसी के सिद्धांत पर आधारित है. इसका इस्तेमाल, डेटा मॉडल में इनपुट के तौर पर किया जा सकता है. इससे, ज़मीन की ऊर्जा, कार्बन, पानी के चक्र की प्रक्रियाओं, और वनस्पति की जैवभूगर्भिक रसायन विज्ञान का हिसाब लगाया जा सकता है. दस्तावेज़: …
[null,null,[],[[["\u003cp\u003eThe MOD17A2H V6.1 product provides an 8-day composite of Gross Primary Productivity (GPP) at 500m resolution, derived using the radiation-use efficiency concept.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset, spanning from 2021-01-01 to 2024-11-24, offers insights into terrestrial energy, carbon, water cycles, and vegetation biogeochemistry.\u003c/p\u003e\n"],["\u003cp\u003eIt includes bands for GPP, Net Photosynthesis (PsnNet), and quality control, and is freely available for use, sale, or redistribution from NASA LP DAAC.\u003c/p\u003e\n"],["\u003cp\u003eUsers can access and analyze this dataset through Google Earth Engine, with code snippets and documentation provided for exploration.\u003c/p\u003e\n"]]],[],null,["# MOD17A2H.061: Terra Gross Primary Productivity 8-Day Global 500m\n\nDataset Availability\n: 2021-01-01T00:00:00Z--2025-08-13T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA LP DAAC at the USGS EROS Center](https://doi.org/10.5067/MODIS/MOD17A2H.061)\n\nCadence\n: 8 Days\n\nTags\n:\n [8-day](/earth-engine/datasets/tags/8-day) [global](/earth-engine/datasets/tags/global) [gpp](/earth-engine/datasets/tags/gpp) [modis](/earth-engine/datasets/tags/modis) [nasa](/earth-engine/datasets/tags/nasa) [photosynthesis](/earth-engine/datasets/tags/photosynthesis) [plant-productivity](/earth-engine/datasets/tags/plant-productivity) [productivity](/earth-engine/datasets/tags/productivity) [psn](/earth-engine/datasets/tags/psn) [terra](/earth-engine/datasets/tags/terra) [usgs](/earth-engine/datasets/tags/usgs) \nmod17a2 \n\n#### Description\n\nThe MOD17A2H V6.1 Gross Primary Productivity (GPP) product\nis a cumulative 8-day composite with a 500m pixel size. The product\nis based on the radiation-use efficiency concept and can be potentially\nused as inputs to data models to calculate terrestrial energy,\ncarbon, water cycle processes, and biogeochemistry of vegetation.\n\nDocumentation:\n\n- [User's Guide](https://lpdaac.usgs.gov/documents/972/MOD17_User_Guide_V61.pdf)\n\n- [Algorithm Theoretical Basis Document (ATBD)](https://lpdaac.usgs.gov/documents/95/MOD17_ATBD.pdf)\n\n- [General Documentation](https://ladsweb.modaps.eosdis.nasa.gov/filespec/MODIS/6/MOD17A2H)\n\n### Bands\n\n\n**Pixel Size**\n\n500 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Scale | Pixel Size | Description |\n|----------|------------|-------|------|--------|------------|----------------------------------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `Gpp` | kg\\*C/m\\^2 | 0 | 3000 | 0.0001 | meters | Gross primary production |\n| `PsnNet` | kg\\*C/m\\^2 | -3000 | 3000 | 0.0001 | meters | Net photosynthesis; GPP minus the maintenance respiration (MR) |\n| `Psn_QC` | | | | | meters | Quality control bits |\n| Bitmask for Psn_QC - Bit 0: MODLAND QC bits - 0: Good quality - 1: Other quality - 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 on pixel - 3: Cloud state not defined, assumed clear - Bits 5-7: 5-level confidence quality score - 0: Very best possible - 1: Good, very usable, but not the best - 2: Substandard due to geometry problems - use with caution - 3: Substandard due to other than geometry problems - use with caution - 4: Couldn't retrieve pixel (NOT PRODUCED AT ALL - non-terrestrial biome) - 7: Fill Value ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n\n### Terms 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\n### Citations\n\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\n### DOIs\n\n- \u003chttps://doi.org/10.5067/MODIS/MOD17A2H.061\u003e\n\n### Explore with Earth Engine\n\n| **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\n### Code Editor (JavaScript)\n\n```javascript\nvar dataset = ee.ImageCollection('MODIS/061/MOD17A2H')\n .filter(ee.Filter.date('2021-01-01', '2021-05-01'));\n\nvar gpp = dataset.select('Gpp');\nvar gppVis = {\n min: 0,\n max: 600,\n palette: ['bbe029', '0a9501', '074b03'],\n};\nMap.setCenter(6.746, 46.529, 2);\nMap.addLayer(gpp, gppVis, 'GPP');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/MODIS/MODIS_061_MOD17A2H) \n[MOD17A2H.061: Terra Gross Primary Productivity 8-Day Global 500m](/earth-engine/datasets/catalog/MODIS_061_MOD17A2H) \nThe MOD17A2H V6.1 Gross Primary Productivity (GPP) product is a cumulative 8-day composite with a 500m pixel size. The product is based on the radiation-use efficiency concept and can be potentially used as inputs to data models to calculate terrestrial energy, carbon, water cycle processes, and biogeochemistry of vegetation. Documentation: ... \nMODIS/061/MOD17A2H, 8-day,global,gpp,modis,nasa,photosynthesis,plant-productivity,productivity,psn,terra,usgs \n2021-01-01T00:00:00Z/2025-08-13T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.5067/MODIS/MOD17A2H.061](https://doi.org/https://doi.org/10.5067/MODIS/MOD17A2H.061)\n- [https://doi.org/10.5067/MODIS/MOD17A2H.061](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/MODIS_061_MOD17A2H)"]]
