Produk komposit Visible Infrared Imaging Radiometer Suite (VIIRS) Surface Reflectance (VNP09H1) Versi 1 selama 8 hari memberikan perkiraan pantulan permukaan tanah dari sensor VIIRS Suomi National Polar-orbiting Partnership (Suomi NPP) untuk tiga band gambar (I1, I2, I3) pada resolusi nominal 500 m (~463 m). Kumpulan data 500 m diperoleh melalui pengambilan sampel ulang resolusi VIIRS 375 m asli dalam produk input L2. Data dikoreksi untuk kondisi atmosfer seperti efek gas molekuler, termasuk ozon dan uap air, serta efek aerosol atmosfer. Setiap
piksel merepresentasikan pengamatan Level 2G terbaik yang mungkin dilakukan selama periode 8 hari, yang dipilih berdasarkan cakupan pengamatan yang tinggi, sudut sensor yang rendah, tidak adanya awan atau bayangan awan, dan muatan aerosol.
Tiga band reflektansi, produk ini mencakup lapisan penjaminan kualitas (QA) negara bagian dan lapisan kualitas band reflektansi.
0: Produk yang dikoreksi dihasilkan dengan kualitas ideal di semua band
1: Produk yang diperbaiki dihasilkan dengan kualitas yang kurang ideal di beberapa atau semua band
2: Produk yang dikoreksi tidak dihasilkan karena efek awan di semua
band
3: Produk yang diperbaiki tidak diproduksi karena alasan lain, beberapa atau
semua band mungkin berupa nilai pengisian [Perhatikan bahwa nilai (11)
menggantikan nilai (01)].
Bit 2-3: Status Cloud
0: Jelas
1: Berawan
2: Campuran
3: Tidak ditetapkan, diasumsikan jelas
Bit 4-7: Rentang empat bit kualitas data Band 1
0: Kualitas tertinggi
1: Detektor bising
2: Detektor tidak berfungsi, data diinterpolasi di L1B
3: Zenith matahari >= 86 derajat
4: Zenith matahari >= 85 dan < 86 derajat
5: Input tidak ada
6: Konstanta internal digunakan sebagai pengganti data klimatologi untuk
setidaknya satu konstanta atmosfer
7: Koreksi di luar batas, piksel dibatasi ke nilai yang sangat
diizinkan
8: Data L1B rusak
9: Tidak diproses karena lautan atau awan yang dalam
Bit 8-11: Rentang empat bit kualitas data Band 2
0: Kualitas tertinggi
1: Detektor bising
2: Detektor tidak berfungsi, data diinterpolasi di L1B
3: Zenith matahari >= 86 derajat
4: Zenith matahari >= 85 dan < 86 derajat
5: Input tidak ada
6: Konstanta internal digunakan sebagai pengganti data klimatologi untuk
setidaknya satu konstanta atmosfer
7: Koreksi di luar batas, piksel dibatasi ke nilai yang sangat
diizinkan
8: Data L1B rusak
9: Tidak diproses karena lautan atau awan yang dalam
Bit 12: Koreksi atmosfer dilakukan
0: Tidak
1: Ya
Bit 13: Koreksi kedekatan dilakukan
0: Tidak
1: Ya
Bit 14: Orbit berbeda dari 500 m
0: Tidak
1: Ya
SurfReflect_State_500m
meter
Jaminan Kualitas (QA) Status Reflektansi Permukaan
Bitmask untuk SurfReflect_State_500m
Bit 0-1: Status cloud
0: Jelas
1: Berawan
2: Campuran
3: Tidak ditetapkan, diasumsikan jelas
Bit 2: Bayangan awan
0: Tidak
1: Ya
Bit 3-5: Flag daratan/perairan
0: Laut dangkal
1: Daratan
2: Garis pantai samudra dan garis pantai danau
3: Perairan pedalaman dangkal
4: Air sementara
5: Perairan pedalaman yang dalam
6: Benua/samudra sedang
7: Biru laut dalam
Bit 6-7: Jumlah aerosol
0: Klimatologi
1: Rendah
2: Rata-Rata
3: Tinggi
Bit 8-9: Cirrus terdeteksi
0: Tidak ada
1: Kecil
2: Rata-Rata
3: Tinggi
Bit 10: Bayangan awan
0: Tidak ada awan
1: Cloud
Bit 11: Flag algoritma kebakaran internal
0: Tidak Ada Api
1: Api
Bit 12: Bendera salju/es
0: Tidak
1: Ya
Bit 13: Pixel berdekatan dengan cloud
0: Tidak
1: Ya
Bit 14: Koreksi BRDF dilakukan
0: Tidak
1: Ya
Bit 15: Flag salju internal
0: Tidak ada salju
1: Salju
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.
Produk komposit 8 hari Visible Infrared Imaging Radiometer Suite (VIIRS) Surface Reflectance (VNP09H1) Versi 1 memberikan perkiraan pantulan permukaan tanah dari sensor VIIRS Suomi National Polar-orbiting Partnership (Suomi NPP) untuk tiga band gambar (I1, I2, I3) pada resolusi nominal 500 m (~463 m). Set data 500 m diperoleh melalui …
[null,null,[],[[["\u003cp\u003eThe VNP09H1 product provides an 8-day composite of land surface reflectance from the Suomi NPP VIIRS sensor at 500m resolution.\u003c/p\u003e\n"],["\u003cp\u003eReflectance data is atmospherically corrected and includes quality assurance layers for cloud state, land/water, and aerosol conditions.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset covers the period from January 19, 2012, to November 24, 2024, and is freely accessible from NASA LP DAAC.\u003c/p\u003e\n"],["\u003cp\u003eImagery bands I1, I2, and I3 estimate land surface reflectance and are accompanied by quality control and state quality assurance bands.\u003c/p\u003e\n"],["\u003cp\u003eUsers are requested to cite the dataset appropriately when publishing results based on this data, with links and guidance provided.\u003c/p\u003e\n"]]],[],null,["Dataset Availability\n: 2012-01-19T00:00:00Z--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/VIIRS/VNP09H1.002)\n\nCadence\n: 1 Day\n\nTags\n:\n[daily](/earth-engine/datasets/tags/daily) [nasa](/earth-engine/datasets/tags/nasa) [noaa](/earth-engine/datasets/tags/noaa) [npp](/earth-engine/datasets/tags/npp) [reflectance](/earth-engine/datasets/tags/reflectance) [satellite-imagery](/earth-engine/datasets/tags/satellite-imagery) [sr](/earth-engine/datasets/tags/sr) [viirs](/earth-engine/datasets/tags/viirs) \n\nDescription \nThe 8-day Visible Infrared Imaging Radiometer Suite (VIIRS) Surface\nReflectance (VNP09H1) Version 1 composite product provides an estimate of\nland surface reflectance from the Suomi National Polar-orbiting Partnership\n(Suomi NPP) VIIRS sensor for three imagery bands (I1, I2, I3) at nominal\n500m resolution (\\~463m). The 500m dataset is derived through resampling the\nnative 375m VIIRS resolution in the L2 input product. The data are corrected\nfor atmospheric conditions such as the effects of molecular gases, including\nozone and water vapor, and for the effects of atmospheric aerosols. Each\npixel represents the best possible Level 2G observation during an 8-day\nperiod, which is selected on the basis of high observation coverage, low\nsensor angle, the absence of clouds or cloud shadow, and aerosol loading.\nThe three reflectance bands, this product includes a state quality assurance\n(QA) layer and a reflectance band quality layer.\n\nDocumentation:\n\n- [User's Guide](https://lpdaac.usgs.gov/documents/1657/VNP09_User_Guide_V2.pdf)\n\n- [Algorithm Theoretical Basis Document (ATBD)](https://lpdaac.usgs.gov/documents/122/VNP09_ATBD.pdf)\n\n- [General Documentation](https://lpdaac.usgs.gov/products/vnp09h1v002/)\n\n- [Land Product Quality Assessment website](https://landweb.modaps.eosdis.nasa.gov/browse?sensor=VIIRS&sat=SNPP)\n\nBands\n\n\n**Pixel Size**\n\n500 meters\n\n**Bands**\n\n| Name | Min | Max | Pixel Size | Description |\n|--------------------------|------|-------|------------|--------------------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `SurfReflect_I1` | -100 | 16000 | meters | 500 m Surface Reflectance Band I1 |\n| `SurfReflect_I2` | -100 | 16000 | meters | 500 m Surface Reflectance Band I2 |\n| `SurfReflect_I3` | -100 | 16000 | meters | 500 m Surface Reflectance Band I3 |\n| `SurfReflect_QC_500m` | | | meters | Surface Reflectance Band Quality Control (QC) |\n| Bitmask for SurfReflect_QC_500m - Bits 0-1: MODLAND QA bits - 0: Corrected product produced at ideal quality all bands - 1: Corrected product produced at less than ideal quality some or all bands - 2: Corrected product not produced due to cloud effects all bands - 3: Corrected product not produced due to other reasons some or all bands may be fill value \\[Note that a value of (11) overrides a value of (01)\\]. - Bits 2-3: Cloud State - 0: Clear - 1: Cloudy - 2: Mixed - 3: Not set, assumed clear - Bits 4-7: Band 1 data quality four bit range - 0: Highest quality - 1: Noisy detector - 2: Dead detector, data interpolated in L1B - 3: Solar zenith \\\u003e= 86 degrees - 4: Solar zenith \\\u003e= 85 and \\\u003c 86 degrees - 5: Missing input - 6: Internal constant used in place of climatological data for at least one atmospheric constant - 7: Correction out of bounds, pixel constrained to extreme allowable value - 8: L1B data faulty - 9: Not processed due to deep ocean or clouds - Bits 8-11: Band 2 data quality four bit range - 0: Highest quality - 1: Noisy detector - 2: Dead detector, data interpolated in L1B - 3: Solar zenith \\\u003e= 86 degrees - 4: Solar zenith \\\u003e= 85 and \\\u003c 86 degrees - 5: Missing input - 6: Internal constant used in place of climatological data for at least one atmospheric constant - 7: Correction out of bounds, pixel constrained to extreme allowable value - 8: L1B data faulty - 9: Not processed due to deep ocean or clouds - Bit 12: Atmospheric correction performed - 0: No - 1: Yes - Bit 13: Adjacency correction performed - 0: No - 1: Yes - Bit 14: Different orbit from 500m - 0: No - 1: Yes ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n| `SurfReflect_State_500m` | | | meters | Surface Reflectance State Quality Assurance (QA) |\n| Bitmask for SurfReflect_State_500m - Bits 0-1: Cloud state - 0: Clear - 1: Cloudy - 2: Mixed - 3: Not set, assumed clear - Bit 2: Cloud shadow - 0: No - 1: Yes - Bits 3-5: Land/water flag - 0: Shallow ocean - 1: Land - 2: Ocean coastlines and lake shorelines - 3: Shallow inland water - 4: Ephemeral water - 5: Deep inland water - 6: Continental/moderate ocean - 7: Deep ocean - Bits 6-7: Aerosol quantity - 0: Climatology - 1: Low - 2: Average - 3: High - Bits 8-9: Cirrus detected - 0: None - 1: Small - 2: Average - 3: High - Bit 10: Cloud shadow - 0: No cloud - 1: Cloud - Bit 11: Internal fire algorithm flag - 0: No Fire - 1: Fire - Bit 12: Snow/ice flag - 0: No - 1: Yes - Bit 13: Pixel is adjacent to cloud - 0: No - 1: Yes - Bit 14: BRDF correction performed - 0: No - 1: Yes - Bit 15: Internal snow flag - 0: No snow - 1: Snow ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\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- Please visit [LP DAAC 'Citing Our Data' page](https://lpdaac.usgs.gov/citing_our_data)\n\nDOIs\n\n- \u003chttps://doi.org/10.5067/VIIRS/VNP09H1.002\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/VNP09H1')\n .filter(ee.Filter.date('2017-05-01', '2017-06-30'));\nvar rgb = dataset.select(['SurfReflect_I1', 'SurfReflect_I2', 'SurfReflect_I3']);\nvar rgbVis = {\n min: 0.0,\n max: 1.0,\n};\nMap.setCenter(17.93, 7.71, 2);\nMap.addLayer(rgb, rgbVis, 'RGB');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NASA/NASA_VIIRS_002_VNP09H1) \n[VNP09H1: VIIRS Surface Reflectance 8-Day L3 Global 500m](/earth-engine/datasets/catalog/NASA_VIIRS_002_VNP09H1) \nThe 8-day Visible Infrared Imaging Radiometer Suite (VIIRS) Surface Reflectance (VNP09H1) Version 1 composite product provides an estimate of land surface reflectance from the Suomi National Polar-orbiting Partnership (Suomi NPP) VIIRS sensor for three imagery bands (I1, I2, I3) at nominal 500m resolution (\\~463m). The 500m dataset is derived through ... \nNASA/VIIRS/002/VNP09H1, daily,nasa,noaa,npp,reflectance,satellite-imagery,sr,viirs \n2012-01-19T00:00:00Z/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/VIIRS/VNP09H1.002](https://doi.org/https://doi.org/10.5067/VIIRS/VNP09H1.002)\n- [https://doi.org/10.5067/VIIRS/VNP09H1.002](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NASA_VIIRS_002_VNP09H1)"]]
