يوفّر المنتج MOD11A1 V6.1 قيمًا يومية لدرجة حرارة سطح الأرض (LST) والانبعاثية في شبكة تبلغ مساحتها 1200 × 1200 كيلومتر. يتم استخراج قيمة درجة الحرارة من منتج MOD11_L2 swath. فوق خط العرض 30 درجة، قد تحتوي بعض وحدات البكسل على ملاحظات متعددة يتم فيها استيفاء معايير السماء الصافية. عند حدوث ذلك، تكون قيمة البكسل هي متوسط جميع العيّنات المرصودة المؤهَّلة. بالإضافة إلى نطاقات درجة حرارة السطح خلال النهار والليل وطبقات مؤشرات الجودة، يتم توفير النطاقَين 31 و32 من MODIS وست طبقات مراقبة.
يوفّر منتج MOD11A1 V6.1 قيمًا يومية لدرجة حرارة سطح الأرض (LST) والانبعاثية في شبكة تبلغ مساحتها 1200 × 1200 كيلومتر. يتم استخراج قيمة درجة الحرارة من منتج MOD11_L2 swath. فوق خط العرض 30 درجة، قد تحتوي بعض وحدات البكسل على ملاحظات متعددة يتم فيها استيفاء معايير السماء الصافية. عند حدوث ذلك، …
[null,null,[],[[["\u003cp\u003eThe MOD11A1 V6.1 product provides daily land surface temperature (LST) and emissivity values globally at a 1km resolution.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset includes daytime and nighttime LST, quality indicators, observation times, view angles, and emissivity bands.\u003c/p\u003e\n"],["\u003cp\u003eData is available from February 24, 2000, to December 10, 2024, and is provided by NASA LP DAAC at the USGS EROS Center.\u003c/p\u003e\n"],["\u003cp\u003eUsers can access and analyze the dataset through Google Earth Engine.\u003c/p\u003e\n"],["\u003cp\u003eMODIS data and products acquired through the LP DAAC have no restrictions on subsequent use, sale, or redistribution.\u003c/p\u003e\n"]]],[],null,["# MOD11A1.061 Terra Land Surface Temperature and Emissivity Daily Global 1km\n\nDataset Availability\n: 2000-02-24T00:00:00Z--2025-08-20T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA LP DAAC at the USGS EROS Center](https://doi.org/10.5067/MODIS/MOD11A1.061)\n\nCadence\n: 1 Day\n\nTags\n:\n [climate](/earth-engine/datasets/tags/climate) [daily](/earth-engine/datasets/tags/daily) [emissivity](/earth-engine/datasets/tags/emissivity) [global](/earth-engine/datasets/tags/global) [lst](/earth-engine/datasets/tags/lst) [modis](/earth-engine/datasets/tags/modis) [nasa](/earth-engine/datasets/tags/nasa) [surface-temperature](/earth-engine/datasets/tags/surface-temperature) [terra](/earth-engine/datasets/tags/terra) [usgs](/earth-engine/datasets/tags/usgs) \nmod11a1 \n\n#### Description\n\nThe MOD11A1 V6.1 product provides daily land surface temperature\n(LST) and emissivity values in a 1200 x 1200 kilometer grid. The\ntemperature value is derived from the MOD11_L2 swath product. Above\n30 degrees latitude, some pixels may have multiple observations\nwhere the criteria for clear-sky are met. When this occurs, the\npixel value is the average of all qualifying observations. Provided\nalong with both the day-time and night-time surface temperature\nbands and their quality indicator layers are MODIS bands 31 and\n32 and six observation layers.\n\nDocumentation:\n\n- [User's Guide](https://lpdaac.usgs.gov/documents/118/MOD11_User_Guide_V6.pdf)\n\n- [Algorithm Theoretical Basis Document (ATBD)](https://lpdaac.usgs.gov/documents/119/MOD11_ATBD.pdf)\n\n- [General Documentation](https://ladsweb.modaps.eosdis.nasa.gov/filespec/MODIS/61/MOD11A1)\n\n### Bands\n\n\n**Pixel Size**\n\n1000 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Scale | Offset | Pixel Size | Description |\n|--------------------|-------|------|-------|--------|--------|------------|----------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `LST_Day_1km` | K | 7500 | 65535 | 0.02 | | meters | Daytime Land Surface Temperature |\n| `QC_Day` | | | | | | meters | Daytime LST Quality Indicators |\n| Bitmask for QC_Day - Bits 0-1: Mandatory QA flags - 0: LST produced, good quality, not necessary to examine more detailed QA - 1: LST produced, other quality, recommend examination of more detailed QA - 2: LST not produced due to cloud effects - 3: LST not produced primarily due to reasons other than cloud - Bits 2-3: Data quality flag - 0: Good data quality - 1: Other quality data - 2: TBD - 3: TBD - Bits 4-5: Emissivity error flag - 0: Average emissivity error \\\u003c= 0.01 - 1: Average emissivity error \\\u003c= 0.02 - 2: Average emissivity error \\\u003c= 0.04 - 3: Average emissivity error \\\u003e 0.04 - Bits 6-7: LST error flag - 0: Average LST error \\\u003c= 1K - 1: Average LST error \\\u003c= 2K - 2: Average LST error \\\u003c= 3K - 3: Average LST error \\\u003e 3K ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n| `Day_view_time` | h | 0 | 240 | 0.1 | | meters | Local time of day observation |\n| `Day_view_angle` | deg | 0 | 130 | | -65 | meters | View zenith angle of day observation |\n| `LST_Night_1km` | K | 7500 | 65535 | 0.02 | | meters | Nighttime Land Surface Temperature |\n| `QC_Night` | | | | | | meters | Nighttime LST Quality indicators |\n| Bitmask for QC_Night - Bits 0-1: Mandatory QA flags - 0: LST produced, good quality, not necessary to examine more detailed QA - 1: LST produced, other quality, recommend examination of more detailed QA - 2: LST not produced due to cloud effects - 3: LST not produced primarily due to reasons other than cloud - Bits 2-3: Data quality flag - 0: Good data quality - 1: Other quality data - 2: TBD - 3: TBD - Bits 4-5: Emissivity error flag - 0: Average emissivity error \\\u003c= 0.01 - 1: Average emissivity error \\\u003c= 0.02 - 2: Average emissivity error \\\u003c= 0.04 - 3: Average emissivity error \\\u003e 0.04 - Bits 6-7: LST error flag - 0: Average LST error \\\u003c= 1K - 1: Average LST error \\\u003c= 2K - 2: Average LST error \\\u003c= 3K - 3: Average LST error \\\u003e 3K ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n| `Night_view_time` | h | 0 | 240 | 0.1 | | meters | Local time of night observation |\n| `Night_view_angle` | deg | 0 | 130 | | -65 | meters | View zenith angle of night observation |\n| `Emis_31` | | 1 | 255 | 0.002 | 0.49 | meters | Band 31 emissivity |\n| `Emis_32` | | 1 | 255 | 0.002 | 0.49 | meters | Band 32 emissivity |\n| `Clear_day_cov` | | 1 | 65535 | 0.0005 | | meters | Day clear-sky coverage |\n| `Clear_night_cov` | | 1 | 65535 | 0.0005 | | meters | Night clear-sky coverage |\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/MOD11A1.061\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/MOD11A1')\n .filter(ee.Filter.date('2018-01-01', '2018-05-01'));\nvar landSurfaceTemperature = dataset.select('LST_Day_1km');\nvar landSurfaceTemperatureVis = {\n min: 13000.0,\n max: 16500.0,\n palette: [\n '040274', '040281', '0502a3', '0502b8', '0502ce', '0502e6',\n '0602ff', '235cb1', '307ef3', '269db1', '30c8e2', '32d3ef',\n '3be285', '3ff38f', '86e26f', '3ae237', 'b5e22e', 'd6e21f',\n 'fff705', 'ffd611', 'ffb613', 'ff8b13', 'ff6e08', 'ff500d',\n 'ff0000', 'de0101', 'c21301', 'a71001', '911003'\n ],\n};\nMap.setCenter(6.746, 46.529, 2);\nMap.addLayer(\n landSurfaceTemperature, landSurfaceTemperatureVis,\n 'Land Surface Temperature');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/MODIS/MODIS_061_MOD11A1) \n[MOD11A1.061 Terra Land Surface Temperature and Emissivity Daily Global 1km](/earth-engine/datasets/catalog/MODIS_061_MOD11A1) \nThe MOD11A1 V6.1 product provides daily land surface temperature (LST) and emissivity values in a 1200 x 1200 kilometer grid. The temperature value is derived from the MOD11_L2 swath product. Above 30 degrees latitude, some pixels may have multiple observations where the criteria for clear-sky are met. When this occurs, ... \nMODIS/061/MOD11A1, climate,daily,emissivity,global,lst,modis,nasa,surface-temperature,terra,usgs \n2000-02-24T00:00:00Z/2025-08-20T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.5067/MODIS/MOD11A1.061](https://doi.org/https://doi.org/10.5067/MODIS/MOD11A1.061)\n- [https://doi.org/10.5067/MODIS/MOD11A1.061](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/MODIS_061_MOD11A1)"]]
