MCD18C2 버전 6.1은 0.05도(적도에서 5,600미터) 해상도로 매일 생성되는 Moderate Resolution Imaging Spectroradiometer (MODIS) Terra 및 Aqua 결합 광합성 활성 방사선 (PAR) 그리드 레벨 3 제품으로, 3시간마다 PAR 추정치가 제공됩니다. PAR은 가시광선 스펙트럼 (400~700나노미터)의 입사 태양 복사이며 다양한 과학 및 애플리케이션 문제를 다루는 지표면 모델에서 중요한 변수입니다. MCD18 제품은 MODIS 데이터의 다중 시간 서명을 사용하여 표면 반사율을 도출한 다음 조회표 (LUT) 접근 방식을 사용하여 입사 PAR을 계산하는 프로토타입 알고리즘을 기반으로 합니다. LUT는 다양한 조명/보기 지오메트리에서 다양한 유형의 에어로졸 및 구름 로딩을 고려합니다. 글로벌 PAR 제품은 MODIS 및 정지궤도 위성 데이터에서 생성됩니다.
데이터를 만드는 데 사용된 방법론에 관한 자세한 내용은 알고리즘 이론적 근거 문서를 참고하세요.
대역
픽셀 크기 500미터
대역
이름
픽셀 크기
설명
GMT_0000_PAR
미터
GMT 00:00의 총 PAR
GMT_0300_PAR
미터
GMT 03:00의 총 PAR
GMT_0600_PAR
미터
GMT 06:00의 총 PAR
GMT_0900_PAR
미터
GMT 09:00의 총 PAR
GMT_1200_PAR
미터
GMT 12:00의 총 PAR
GMT_1500_PAR
미터
GMT 15:00의 총 PAR
GMT_1800_PAR
미터
GMT 18:00의 총 PAR
GMT_2100_PAR
미터
GMT 21:00의 총 PAR
이용약관
이용약관
LP DAAC를 통해 획득한 MODIS 데이터 및 제품은 후속 사용, 판매 또는 재배포에 제한이 없습니다.
MCD18C2 버전 6.1은 Moderate Resolution Imaging Spectroradiometer (MODIS) Terra 및 Aqua 결합 광합성 유효 복사량 (PAR) 그리드 수준 3 제품으로, 3시간마다 PAR 추정치를 사용하여 0.05도 (적도에서 5,600미터) 해상도로 매일 생성됩니다. PAR은 가시광선 스펙트럼의 입사 태양 복사입니다.
[null,null,[],[[["\u003cp\u003eMCD18C2 V6.1 provides daily, 3-hourly estimates of Photosynthetically Active Radiation (PAR) at 500-meter resolution using MODIS Terra and Aqua data.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset covers the period from February 24, 2002, to June 1, 2024, and is based on surface reflectance derived from MODIS observations.\u003c/p\u003e\n"],["\u003cp\u003ePAR, crucial for land-surface models, is calculated using a look-up table approach considering aerosols, clouds, and illumination geometry.\u003c/p\u003e\n"],["\u003cp\u003eAlthough V6.1 is no longer being produced and has been replaced by V6.2, it remains available through Google Earth Engine.\u003c/p\u003e\n"],["\u003cp\u003eThe data has no restrictions on use, sale, or redistribution and is provided by NASA LP DAAC at the USGS EROS Center.\u003c/p\u003e\n"]]],["The MCD18C2 Version 6.1 dataset provides daily, gridded estimates of Photosynthetically Active Radiation (PAR) every 3 hours, derived from MODIS Terra and Aqua data. It's a Level 3 product, available from 2002-02-24 to 2024-06-01, at a 0.05-degree resolution. Data is provided at intervals `GMT_0000_PAR` to `GMT_2100_PAR` at each three hour mark, capturing the total PAR. It is accessible via Google Earth Engine and has no restrictions on use or redistribution. The data has been superseded by a new dataset.\n"],null,["# MCD18C2.061 Photosynthetically Active Radiation Daily 3-Hour [deprecated]\n\n**Caution:** This dataset has been superseded by [MODIS/062/MCD18C2](/earth-engine/datasets/catalog/MODIS_062_MCD18C2). \n\nDataset Availability\n: 2002-02-24T00:00:00Z--2024-06-01T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA LP DAAC at the USGS EROS Center](https://lpdaac.usgs.gov/products/mcd18c2v061/)\n\nCadence\n: 1 Day\n\nTags\n:\n climate \n par \nradiation \n\n#### Description\n\nThe MCD18C2 Version 6.1\nis a Moderate Resolution Imaging Spectroradiometer\n(MODIS) Terra and Aqua combined Photosynthetically Active Radiation (PAR)\ngridded Level 3 product produced daily at 0.05 degree (5,600 meters at the\nequator) resolution with estimates of PAR every 3 hours. PAR is incident\nsolar radiation in the visible spectrum (400-700 nanometers) and is an\nimportant variable in land-surface models that address a variety of\nscientific and application issues. The MCD18 products are based on a\nprototyping algorithm that uses multi-temporal signatures of MODIS data to\nderive surface reflectance and then calculate incident PAR using the look-up\ntable (LUT) approach. The LUTs consider different types of loadings of\naerosols and clouds at a variety of illumination/viewing geometry. Global\nPAR products are generated from MODIS and geostationary satellite data.\nAdditional details regarding the methodology used to create the data are\navailable in the\n[Algorithm Theoretical Basis Document](https://lpdaac.usgs.gov/documents/106/MCD18_ATBD.pdf)\n\n### Bands\n\n\n**Pixel Size**\n\n500 meters\n\n**Bands**\n\n| Name | Pixel Size | Description |\n|----------------|------------|------------------------|\n| `GMT_0000_PAR` | meters | Total PAR at GMT 00:00 |\n| `GMT_0300_PAR` | meters | Total PAR at GMT 03:00 |\n| `GMT_0600_PAR` | meters | Total PAR at GMT 06:00 |\n| `GMT_0900_PAR` | meters | Total PAR at GMT 09:00 |\n| `GMT_1200_PAR` | meters | Total PAR at GMT 12:00 |\n| `GMT_1500_PAR` | meters | Total PAR at GMT 15:00 |\n| `GMT_1800_PAR` | meters | Total PAR at GMT 18:00 |\n| `GMT_2100_PAR` | meters | Total PAR at GMT 21:00 |\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/MCD18C2.061\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/MCD18C2')\n .filter(ee.Filter.date('2001-01-01', '2001-02-01'));\nvar gmt_1200_par = dataset.select('GMT_1200_PAR');\nvar gmt_1200_par_vis = {\n min: -236,\n max: 316,\n palette: ['0f17ff', 'b11406', 'f1ff23'],\n};\nMap.setCenter(6.746, 46.529, 2);\nMap.addLayer(\n gmt_1200_par, gmt_1200_par_vis,\n 'Total PAR at GMT 12:00');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/MODIS/MODIS_061_MCD18C2) \n[MCD18C2.061 Photosynthetically Active Radiation Daily 3-Hour \\[deprecated\\]](/earth-engine/datasets/catalog/MODIS_061_MCD18C2) \nThe MCD18C2 Version 6.1 is a Moderate Resolution Imaging Spectroradiometer (MODIS) Terra and Aqua combined Photosynthetically Active Radiation (PAR) gridded Level 3 product produced daily at 0.05 degree (5,600 meters at the equator) resolution with estimates of PAR every 3 hours. PAR is incident solar radiation in the visible spectrum ... \nMODIS/061/MCD18C2, climate,par,radiation \n2002-02-24T00:00:00Z/2024-06-01T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.5067/MODIS/MCD18C2.061](https://doi.org/https://lpdaac.usgs.gov/products/mcd18c2v061/)\n- [https://doi.org/10.5067/MODIS/MCD18C2.061](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/MODIS_061_MCD18C2)"]]
