محصول MYD11A2 V6.1 دمای متوسط 8 روزه سطح زمین (LST) را در یک شبکه 1200×1200 کیلومتری فراهم می کند. هر مقدار پیکسل در MYD11A2 میانگین ساده ای از تمام پیکسل های MYD11A1 LST مربوطه است که در آن دوره 8 روزه جمع آوری شده است. MYD11A2 یک میانگین گیری ساده از تمام مقادیر LST روزانه را بدون هیچ فیلتری برای بیت های QA خاص انجام می دهد. هر یک از مقادیر QA MYD11A2 بر اساس اکثر مقادیر ورودی روزانه QA برای هر پیکسل معین تنظیم می شود.
دوره ترکیب 8 روزه به این دلیل انتخاب شد که دو برابر این دوره، دوره دقیق تکرار مسیر زمینی سکوهای Terra و Aqua است. در این محصول به همراه باندهای دمای سطح روز و شب و لایه های نشانگر کیفیت (QC) آنها، باندهای 31 و 32 و هشت لایه مشاهدهی MODIS نیز وجود دارد.
محصول MYD11A2 V6.1 دمای متوسط 8 روزه سطح زمین (LST) را در یک شبکه 1200×1200 کیلومتری فراهم می کند. هر مقدار پیکسل در MYD11A2 میانگین ساده ای از تمام پیکسل های MYD11A1 LST مربوطه است که در آن دوره 8 روزه جمع آوری شده است. MYD11A2 یک میانگین گیری ساده از تمام روزانه …
MODIS/061/MYD11A2، 8 روزه، آب و هوا، آب و هوا، انتشار، جهانی، lst، modis، nasa، دمای سطح، usgs
[null,null,[],[[["\u003cp\u003eMYD11A2 V6.1 provides an 8-day average land surface temperature (LST) at a 1km resolution, derived from MODIS Aqua data.\u003c/p\u003e\n"],["\u003cp\u003eThe product includes daytime and nighttime LST, quality indicators, emissivity, and observation layers.\u003c/p\u003e\n"],["\u003cp\u003eData is available from 2002-07-04 to 2024-11-24 and is provided by NASA LP DAAC at the USGS EROS Center.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is freely available for use, with no restrictions on subsequent use, sale, or redistribution.\u003c/p\u003e\n"],["\u003cp\u003eUsers can access and analyze the dataset through Google Earth Engine.\u003c/p\u003e\n"]]],[],null,["# MYD11A2.061 Aqua Land Surface Temperature and Emissivity 8-Day Global 1km\n\nDataset Availability\n: 2002-07-04T00:00:00Z--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/MYD11A2.061)\n\nCadence\n: 8 Days\n\nTags\n:\n [8-day](/earth-engine/datasets/tags/8-day) [aqua](/earth-engine/datasets/tags/aqua) [climate](/earth-engine/datasets/tags/climate) [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) [usgs](/earth-engine/datasets/tags/usgs) \nmyd11a2 \n\n#### Description\n\nThe MYD11A2 V6.1 product provides an average 8-day land\nsurface temperature (LST) in a 1200 x 1200 kilometer grid. Each\npixel value in MYD11A2 is a simple average of all the corresponding\nMYD11A1 LST pixels collected within that 8 day period. The MYD11A2 does a\nsimple averaging of all daily LST values, without any filtering for specific\nQA bits. Each of the MYD11A2 QA values are set based on what majority of\ninput daily QA values are for any given pixel.\n\nThe 8 day compositing period was chosen because twice that period is\nthe exact ground track repeat period of the Terra and Aqua platforms.\nIn this product, along with both the day- and night-time surface\ntemperature bands and their quality indicator (QC) layers, are\nalso MODIS bands 31 and 32 and eight 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/MYD11A2)\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 | Day land surface temperature |\n| `QC_Day` | | | | | | meters | Daytime LST quality indicators |\n| Bitmask for QC_Day - Bits 0-1: Mandatory QA flags - 0: Pixel produced, good quality, not necessary to examine more detailed QA - 1: Pixel produced, unreliable or unquantifiable quality, recommend examination of more detailed QA - 2: Pixel not produced due to cloud effects - 3: Pixel not produced primarily due to reasons other than cloud (such as ocean pixel, poor input data) - 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_angl` | deg | 0 | 130 | | -65 | meters | View zenith angle of day observation |\n| `LST_Night_1km` | K | 7500 | 65635 | 0.02 | | meters | Night land surface temperature |\n| `QC_Night` | | | | | | meters | Nighttime LST quality indicators |\n| Bitmask for QC_Night - Bits 0-1: Mandatory QA flags - 0: Pixel produced, good quality, not necessary to examine more detailed QA - 1: Pixel produced, unreliable or unquantifiable quality, recommend examination of more detailed QA - 2: Pixel not produced due to cloud effects - 3: Pixel not produced primarily due to reasons other than cloud (such as ocean pixel, poor input data) - 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_angl` | 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_sky_days` | | | | | | meters | Days in clear-sky conditions |\n| Bitmask for Clear_sky_days - Bit 0: Day 1 clear sky flag - 0: Day 1 is not clear-sky - 1: Day 1 is clear-sky - Bit 1: Day 2 clear sky flag - 0: Day 2 is not clear-sky - 1: Day 2 is clear-sky - Bit 2: Day 3 clear sky flag - 0: Day 3 is not clear-sky - 1: Day 3 is clear-sky - Bit 3: Day 4 clear sky flag - 0: Day 4 is not clear-sky - 1: Day 4 is clear-sky - Bit 4: Day 5 clear sky flag - 0: Day 5 is not clear-sky - 1: Day 5 is clear-sky - Bit 5: Day 6 clear sky flag - 0: Day 6 is not clear-sky - 1: Day 6 is clear-sky - Bit 6: Day 7 clear sky flag - 0: Day 7 is not clear-sky - 1: Day 7 is clear-sky - Bit 7: Day 8 clear sky flag - 0: Day 8 is not clear-sky - 1: Day 8 is clear-sky ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n| `Clear_sky_nights` | | | | | | meters | Nights in clear-sky conditions |\n| Bitmask for Clear_sky_nights - Bit 0: Night 1 clear sky flag - 0: Night 1 is not clear-sky - 1: Night 1 is clear-sky - Bit 1: Night 2 clear sky flag - 0: Night 2 is not clear-sky - 1: Night 2 is clear-sky - Bit 2: Night 3 clear sky flag - 0: Night 3 is not clear-sky - 1: Night 3 is clear-sky - Bit 3: Night 4 clear sky flag - 0: Night 4 is not clear-sky - 1: Night 4 is clear-sky - Bit 4: Night 5 clear sky flag - 0: Night 5 is not clear-sky - 1: Night 5 is clear-sky - Bit 5: Night 6 clear sky flag - 0: Night 6 is not clear-sky - 1: Night 6 is clear-sky - Bit 6: Night 7 clear sky flag - 0: Night 7 is not clear-sky - 1: Night 7 is clear-sky - Bit 7: Night 8 clear sky flag - 0: Night 8 is not clear-sky - 1: Night 8 is clear-sky ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\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/MYD11A2.061\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/MYD11A2')\n .filter(ee.Filter.date('2018-01-01', '2018-05-01'));\nvar landSurfaceTemperature = dataset.select('LST_Day_1km');\nvar landSurfaceTemperatureVis = {\n min: 14000.0,\n max: 16000.0,\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_MYD11A2) \n[MYD11A2.061 Aqua Land Surface Temperature and Emissivity 8-Day Global 1km](/earth-engine/datasets/catalog/MODIS_061_MYD11A2) \nThe MYD11A2 V6.1 product provides an average 8-day land surface temperature (LST) in a 1200 x 1200 kilometer grid. Each pixel value in MYD11A2 is a simple average of all the corresponding MYD11A1 LST pixels collected within that 8 day period. The MYD11A2 does a simple averaging of all daily ... \nMODIS/061/MYD11A2, 8-day,aqua,climate,emissivity,global,lst,modis,nasa,surface-temperature,usgs \n2002-07-04T00:00:00Z/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/MYD11A2.061](https://doi.org/https://doi.org/10.5067/MODIS/MYD11A2.061)\n- [https://doi.org/10.5067/MODIS/MYD11A2.061](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/MODIS_061_MYD11A2)"]]
