Visible Infrared Imaging Radiometer Suite (VIIRS) Suomi National Polar-orbiting Partnership (SNPP) mendukung sensor Day-Night Band (DNB) yang memberikan pengukuran harian global cahaya tampak dan inframerah dekat(NIR) nokturnal yang sesuai untuk ilmu dan aplikasi sistem Bumi. Ultra-sensitivitas DNB VIIRS dalam kondisi cahaya redup memungkinkan kami membuat serangkaian produk malam berkualitas ilmiah baru yang menunjukkan peningkatan substansial dalam resolusi dan kalibrasi sensor jika dibandingkan dengan produk gambar cahaya malam dari era sebelumnya, yaitu Defense Meteorological Satellite Program/Operational Linescan System (DMSP/OLS). Peningkatan tersebut memungkinkan produk DNB VIIRS memantau dengan lebih baik besarnya dan tanda tangan fenomena malam hari, serta sumber emisi cahaya antropogenik.
VNP46A2 adalah nama singkat untuk produk Lampu Malam (NTL) harian yang dikoreksi dengan cahaya bulan dan atmosfer yang disebut VIIRS/NPP Gap-Filled Lunar BRDF-Adjusted Nighttime Lights Daily L3 Global 500m Linear Lat Lon Grid.
BRDF yang Diisi Kesenjangan telah memperbaiki NTL DNB
DNB_Lunar_Irradiance
0
6553.4
meter
Iradiasi Bulan DNB
Latest_High_Quality_Retrieval
meter
Pengambilan radiasi DNB yang dikoreksi BRDF berkualitas tinggi terbaru
Mandatory_Quality_Flag
0
3
meter
Tanda kualitas wajib
Snow_Flag
0
1
meter
Bendera untuk penutup salju
QF_Cloud_Mask
meter
Flag kualitas untuk cloud mask
Bitmask untuk QF_Cloud_Mask
Bit 0: Siang/Malam
0: Malam
1: Hari
Bit 1-3: Latar Belakang Darat/Air
0: Daratan & Gurun
1: Daratan tanpa Gurun
2: Perairan Pedalaman
3: Air Laut
5: Pesisir
Bit 4-5: Kualitas Masker Awan
0: Buruk
1: Rendah
2: Sedang
3: Tinggi
Bit 6-7: Hasil Deteksi Cloud & Indikator Tingkat Keyakinan
0: Yakin (Confident Clear)
1: Kemungkinan Cerah
2: Mungkin Berawan
3: Berawan Yakin
Bit 8: Shadow Detected
0: Tidak
1: Ya
Bit 9: Deteksi Cirrus (IR) (BTM15 - BTM16)
0: Tidak ada awan
1: Cloud
Bit 10: Permukaan Salju/Es
0: Tidak Ada Salju/Es
1: Salju/Es
Tabel Kelas Mandatory_Quality_Flag
Nilai
Warna
Deskripsi
0
Tidak ada
Lampu malam persisten berkualitas tinggi
1
Tidak ada
Lampu malam Efemeral berkualitas tinggi
2
Tidak ada
Kualitas buruk, Pencilan, potensi kontaminasi awan,
atau masalah lainnya
255
Tidak ada
Tidak ada pengambilan, Nilai pengisian (disamarkan saat penyerapan)
Tabel Class Snow_Flag
Nilai
Warna
Deskripsi
0
Tidak ada
Tidak Ada Salju/Es
1
Tidak ada
Salju/Es
Persyaratan Penggunaan
Persyaratan Penggunaan
Data NASA LP DAAC dapat diakses secara bebas; namun, saat penulis memublikasikan data ini atau karya yang didasarkan pada data tersebut, penulis diminta untuk mengutip set data dalam teks publikasi dan menyertakan referensi ke set data tersebut dalam daftar referensi.
Kutipan
Kutipan:
Román, M.O., Wang, Z., Sun, Q., Kalb, V., Miller, S.D., Molthan, A.,
Schultz, L., Bell, J., Stokes, E.C., Pandey, B. dan Seto, K.C., et al.
(2018). Rangkaian produk lampu malam Black Marble NASA.
Remote Sensing of Environment 210, 113-143.
10.1016/j.rse.2018.03.017
Suomi National Polar-orbiting Partnership (SNPP) Visible Infrared Imaging Radiometer Suite (VIIRS) mendukung sensor Day-Night Band (DNB) yang memberikan pengukuran harian global terhadap cahaya tampak dan inframerah dekat(NIR) nokturnal yang cocok untuk ilmu dan aplikasi sistem Bumi. Sensitivitas ultra-DNB VIIRS dalam kondisi cahaya redup memungkinkan kami membuat …
[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)"]]
