Suomi National Polar-orbiting Partnership (SNPP) Visible Infrared Imaging Radiometer Suite (VIIRS)는 지구 시스템 과학 및 애플리케이션에 적합한 야간 가시광선 및 근적외선 (NIR)의 전 세계 일일 측정을 제공하는 Day-Night Band(DNB) 센서를 지원합니다. 저조도 조건에서 VIIRS DNB의 초감도를 통해 이전 시대의 국방 기상 위성 프로그램/운영 라인스캔 시스템 (DMSP/OLS)의 야간 조명 이미지 제품과 비교할 때 센서 해상도와 보정에서 상당한 개선을 보여주는 새로운 과학 품질 야간 제품을 생성할 수 있습니다. 이러한 개선을 통해 VIIRS DNB 제품은 야간 현상과 인위적인 광원 배출의 크기와 특징을 더 잘 모니터링할 수 있습니다.
VNP46A2는 VIIRS/NPP Gap-Filled Lunar BRDF-Adjusted Nighttime Lights Daily L3 Global 500m Linear Lat Lon Grid라는 일일 달빛 및 대기 보정 야간 조명 (NTL) 제품의 약칭입니다.
Suomi National Polar-orbiting Partnership (SNPP) Visible Infrared Imaging Radiometer Suite (VIIRS)는 지구 시스템 과학 및 애플리케이션에 적합한 야간 가시광선 및 근적외선 (NIR)의 전 세계 일일 측정을 제공하는 Day-Night Band(DNB) 센서를 지원합니다. 저조도 환경에서 VIIRS DNB의 초감도를 통해 …를 생성할 수 있습니다.
[null,null,[],[],[],null,["Dataset Availability\n: 2012-01-19T00:00:00Z--2025-08-24T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA LAADS DAAC](https://doi.org/10.5067/VIIRS/VNP46A2.002)\n\nCadence\n: 1 Day\n\nTags\n:\n[brdf](/earth-engine/datasets/tags/brdf) [daily](/earth-engine/datasets/tags/daily) [nasa](/earth-engine/datasets/tags/nasa) [nighttime](/earth-engine/datasets/tags/nighttime) [noaa](/earth-engine/datasets/tags/noaa) [population](/earth-engine/datasets/tags/population) [viirs](/earth-engine/datasets/tags/viirs) \n\nDescription \nThe Suomi National Polar-orbiting Partnership (SNPP) Visible Infrared\nImaging Radiometer Suite (VIIRS) supports a Day-Night Band (DNB) sensor that\nprovides global daily measurements of nocturnal visible and\nnear-infrared(NIR) light that are suitable for Earth system science and\napplications. The VIIRS DNB's ultra-sensitivity in lowlight conditions\nenable us to generate a new set of science-quality nighttime products that\nmanifest substantial improvements in sensor resolution and calibration when\ncompared to the previous era of Defense Meteorological Satellite\nProgram/Operational Linescan System's (DMSP/OLS) nighttime lights image\nproducts. Such improvements allow the VIIRS DNB products to better monitor\nboth the magnitude and signature of nighttime phenomena, and anthropogenic\nsources of light emissions.\n\nVNP46A2 is the short-name for the daily moonlight- and atmosphere-corrected\nNighttime Lights (NTL) product called VIIRS/NPP Gap-Filled Lunar\nBRDF-Adjusted Nighttime Lights Daily L3 Global 500m Linear Lat Lon Grid.\n\nDocumentation:\n\n- [User's Guide](https://ladsweb.modaps.eosdis.nasa.gov/api/v2/content/archives/Document%20Archive/Science%20Data%20Product%20Documentation/VIIRS_Black_Marble_UG_v1.3_Sep_2022.pdf)\n\n- [Algorithm Theoretical Basis Document (ATBD)](https://ladsweb.modaps.eosdis.nasa.gov/api/v2/content/archives/Document%20Archive/Science%20Data%20Product%20Documentation/Product%20Generation%20Algorithms/VIIRS_Black_Marble_ATBD_v1.1_July_2020.pdf)\n\n- [General Documentation](https://ladsweb.modaps.eosdis.nasa.gov/missions-and-measurements/products/VNP46A2/)\n\nBands\n\n\n**Pixel Size**\n\n500 meters\n\n**Bands**\n\n| Name | Min | Max | Pixel Size | Description |\n|-------------------------------------|-----|--------|------------|-----------------------------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `DNB_BRDF_Corrected_NTL` | 0 | 6553.4 | meters | BRDF corrected DNB NTL |\n| `Gap_Filled_DNB_BRDF_Corrected_NTL` | 0 | 6553.4 | meters | Gap Filled BRDF corrected DNB NTL |\n| `DNB_Lunar_Irradiance` | 0 | 6553.4 | meters | DNB Lunar Irradiance |\n| `Latest_High_Quality_Retrieval` | | | meters | Latest high quality BRDF corrected DNB radiance retrieval |\n| `Mandatory_Quality_Flag` | 0 | 3 | meters | Mandatory quality flag |\n| `Snow_Flag` | 0 | 1 | meters | Flag for snow cover |\n| `QF_Cloud_Mask` | | | meters | Quality flag for cloud mask |\n| Bitmask for QF_Cloud_Mask - Bit 0: Day/Night - 0: Night - 1: Day - Bits 1-3: Land/Water Background - 0: Land \\& Desert - 1: Land no Desert - 2: Inland Water - 3: Sea Water - 5: Coastal - Bits 4-5: Cloud Mask Quality - 0: Poor - 1: Low - 2: Medium - 3: High - Bits 6-7: Cloud Detection Results \\& Confidence Indicator - 0: Confident Clear - 1: Probably Clear - 2: Probably Cloudy - 3: Confident Cloudy - Bit 8: Shadow Detected - 0: No - 1: Yes - Bit 9: Cirrus Detection (IR) (BTM15 - BTM16) - 0: No cloud - 1: Cloud - Bit 10: Snow/Ice Surface - 0: No Snow/Ice - 1: Snow/Ice ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n\n**Mandatory_Quality_Flag Class Table**\n\n| Value | Color | Description |\n|-------|-------|-----------------------------------------------------------------------|\n| 0 | None | High-quality, Persistent nighttime lights |\n| 1 | None | High-quality, Ephemeral nighttime Lights |\n| 2 | None | Poor-quality, Outlier, potential cloud contamination, or other issues |\n| 255 | None | No retrieval, Fill value (masked out on ingestion) |\n\n**Snow_Flag Class Table**\n\n| Value | Color | Description |\n|-------|-------|-------------|\n| 0 | None | No Snow/Ice |\n| 1 | None | Snow/Ice |\n\nTerms of Use\n\n**Terms of Use**\n\nLP DAAC NASA data are freely accessible; however, when an author\npublishes these data or works based on the data, it is requested that the\nauthor cite the datasets within the text of the publication and include a\nreference to them in the reference list.\n\nCitations \nCitations:\n\n- Román, M.O., Wang, Z., Sun, Q., Kalb, V., Miller, S.D., Molthan, A.,\n Schultz, L., Bell, J., Stokes, E.C., Pandey, B. and Seto, K.C., et al.\n (2018). NASA's Black Marble nighttime lights product suite.\n Remote Sensing of Environment 210, 113-143.\n [10.1016/j.rse.2018.03.017](https://doi.org/10.1016/j.rse.2018.03.017)\n\nDOIs\n\n- \u003chttps://doi.org/10.5067/VIIRS/VNP46A2.002\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('NASA/VIIRS/002/VNP46A2')\n .filter(ee.Filter.date('2013-01-01', '2013-03-01'));\n\nvar nighttime = dataset.select('Gap_Filled_DNB_BRDF_Corrected_NTL');\nvar nighttimeVis = {min: 0.0, max: 1.0};\n\nMap.setCenter(-77.1056, 38.8904, 3);\nMap.addLayer(nighttime, nighttimeVis, 'Nighttime');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NASA/NASA_VIIRS_002_VNP46A2) \n[VNP46A2: VIIRS Lunar Gap-Filled BRDF Nighttime Lights Daily L3 Global 500m](/earth-engine/datasets/catalog/NASA_VIIRS_002_VNP46A2) \nThe Suomi National Polar-orbiting Partnership (SNPP) Visible Infrared Imaging Radiometer Suite (VIIRS) supports a Day-Night Band (DNB) sensor that provides global daily measurements of nocturnal visible and near-infrared(NIR) light that are suitable for Earth system science and applications. The VIIRS DNB's ultra-sensitivity in lowlight conditions enable us to generate a ... \nNASA/VIIRS/002/VNP46A2, brdf,daily,nasa,nighttime,noaa,population,viirs \n2012-01-19T00:00:00Z/2025-08-24T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.5067/VIIRS/VNP46A2.002](https://doi.org/https://doi.org/10.5067/VIIRS/VNP46A2.002)\n- [https://doi.org/10.5067/VIIRS/VNP46A2.002](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NASA_VIIRS_002_VNP46A2)"]]
