The MYD09A1 V6 product provides an estimate of the surface spectral reflectance of Aqua MODIS bands 1-7 at 500m resolution and corrected for atmospheric conditions such as gasses, aerosols, and Rayleigh scattering. Along with the seven reflectance bands is a quality layer and four observation bands. For each pixel, a value is selected from all the acquisitions within the 8-day composite on the basis of high observation coverage, low view angle, the absence of clouds or cloud shadow, and aerosol loading.
Documentation:
MYD09A1 V6产品提供了Aqua MODIS 1-7带500米分辨率的表面光谱反射率的估计,并对大气条件如气体、气溶胶和瑞利散射进行了校正。与七个反射带一起的是一个质量层和四个观测带。对于每个像素,根据高观测覆盖率、低视角、无云或云影以及气溶胶负荷,从8天合成的所有采集中选择一个值。
Resolution
500 meters
Bands Table
Name | Description | Min | Max | Units | Wavelength | Scale |
---|---|---|---|---|---|---|
sur_refl_b01 | Surface reflectance for band 1 | -100 | 16000 | 620-670nm | 0.0001 | |
sur_refl_b02 | Surface reflectance for band 2 | -100 | 16000 | 841-876nm | 0.0001 | |
sur_refl_b03 | Surface reflectance for band 3 | -100 | 16000 | 459-479nm | 0.0001 | |
sur_refl_b04 | Surface reflectance for band 4 | -100 | 16000 | 545-565nm | 0.0001 | |
sur_refl_b05 | Surface reflectance for band 5 | -100 | 16000 | 1230-1250nm | 0.0001 | |
sur_refl_b06 | Surface reflectance for band 6 | -100 | 16000 | 1628-1652nm | 0.0001 | |
sur_refl_b07 | Surface reflectance for band 7 | -100 | 16000 | 2105-2155nm | 0.0001 | |
QA | Surface reflectance 500m band quality control flags | 0 | ||||
QA Bitmask | Bits 0-1: MODLAND QA bits 0: Corrected product produced at ideal quality - all bands1: Corrected product produced at less than ideal quality - some or all bands2: Corrected product not produced due to cloud effects - all bands3: Corrected product not produced for other reasons - some or all bands, may be fill value (11) [Note that a value of (11) overrides a value of (01)]Bits 2-5: Band 1 data quality, four bit range 0: Highest quality7: Noisy detector8: Dead detector, data interpolated in L1B9: Solar zenith ≥ 86 degrees10: Solar zenith ≥ 85 and < 86 degrees11: Missing input12: Internal constant used in place of climatological data for at least one atmospheric constant13: Correction out of bounds, pixel constrained to extreme allowable value14: L1B data faulty15: Not processed due to deep ocean or cloudsBits 6-9: Band 2 data quality, four bit range 0: Highest quality7: Noisy detector8: Dead detector, data interpolated in L1B9: Solar zenith ≥ 86 degrees10: Solar zenith ≥ 85 and < 86 degrees11: Missing input12: Internal constant used in place of climatological data for at least one atmospheric constant13: Correction out of bounds, pixel constrained to extreme allowable value14: L1B data faulty15: Not processed due to deep ocean or cloudsBits 10-13: Band 3 data quality, four bit range 0: Highest quality7: Noisy detector8: Dead detector, data interpolated in L1B9: Solar zenith ≥ 86 degrees10: Solar zenith ≥ 85 and < 86 degrees11: Missing input12: Internal constant used in place of climatological data for at least one atmospheric constant13: Correction out of bounds, pixel constrained to extreme allowable value14: L1B data faulty15: Not processed due to deep ocean or cloudsBits 14-17: Band 4 data quality, four bit range 0: Highest quality7: Noisy detector8: Dead detector, data interpolated in L1B9: Solar zenith ≥ 86 degrees10: Solar zenith ≥ 85 and < 86 degrees11: Missing input12: Internal constant used in place of climatological data for at least one atmospheric constant13: Correction out of bounds, pixel constrained to extreme allowable value14: L1B data faulty15: Not processed due to deep ocean or cloudsBits 18-21: Band 5 data quality, four bit range 0: Highest quality7: Noisy detector8: Dead detector, data interpolated in L1B9: Solar zenith ≥ 86 degrees10: Solar zenith ≥ 85 and < 86 degrees11: Missing input12: Internal constant used in place of climatological data for at least one atmospheric constant13: Correction out of bounds, pixel constrained to extreme allowable value14: L1B data faulty15: Not processed due to deep ocean or cloudsBits 22-25: Band 6 data quality, four bit range 0: Highest quality7: Noisy detector8: Dead detector, data interpolated in L1B9: Solar zenith ≥ 86 degrees10: Solar zenith ≥ 85 and < 86 degrees11: Missing input12: Internal constant used in place of climatological data for at least one atmospheric constant13: Correction out of bounds, pixel constrained to extreme allowable value14: L1B data faulty15: Not processed due to deep ocean or cloudsBits 26-29: Band 7 data quality, four bit range 0: Highest quality7: Noisy detector8: Dead detector, data interpolated in L1B9: Solar zenith ≥ 86 degrees10: Solar zenith ≥ 85 and < 86 degrees11: Missing input12: Internal constant used in place of climatological data for at least one atmospheric constant13: Correction out of bounds, pixel constrained to extreme allowable value14: L1B data faulty15: Not processed due to deep ocean or cloudsBit 30: Atmospheric correction performed 0: No1: YesBit 31: Adjacency correction performed 0: No1: Yes | |||||
SolarZenith | MODIS Solar zenith angle | 0 | 18000 | Degrees | 0.01 | |
ViewZenith | MODIS view zenith angle | 0 | 18000 | Degrees | 0.01 | |
RelativeAzimuth | MODIS relative azimuth angle | -18000 | 18000 | Degrees | 0.01 | |
StateQA | Surface reflectance 500m state flags | 0 | ||||
StateQA Bitmask | Bits 0-1: Cloud state 0: Clear1: Cloudy2: Mixed3: Not set, assumed clearBit 2: Cloud shadow 0: No1: YesBits 3-5: Land/water flag 0: Shallow ocean1: Land2: Ocean coastlines and lake shorelines3: Shallow inland water4: Ephemeral water5: Deep inland water6: Continental/moderate ocean7: Deep oceanBits 6-7: Aerosol quantity 0: Climatology1: Low2: Average3: HighBits 8-9: Cirrus detected 0: None1: Small2: Average3: HighBit 10: Internal cloud algorithm flag 0: No cloud1: CloudBit 11: Internal fire algorithm flag 0: No fire1: FireBit 12: MOD35 snow/ice flag 0: No1: YesBit 13: Pixel is adjacent to cloud 0: No1: YesBit 14: BRDF correction performed data 0: No1: YesBit 15: Internal snow mask 0: No snow1: Snow | |||||
DayOfYear | Julian day of the year for the pixel | 1 | 366 |
SolarZenithMODIS Solar zenith angle018000Degrees0.01ViewZenithMODIS view zenith angle018000Degrees0.01RelativeAzimuthMODIS relative azimuth angle-1800018000Degrees0.01StateQASurface reflectance 500m state flags0StateQA Bitmask
DayOfYearJulian day of the year for the pixel1366
使用说明:
Please visit LP DAAC 'Citing Our Data' page for information on citing LP DAAC datasets.
数据引用:
代码:
var dataset = ee.ImageCollection('MODIS/006/MYD09A1')
.filter(ee.Filter.date('2018-01-01', '2018-05-01'));
var trueColor =
dataset.select(['sur_refl_b01', 'sur_refl_b04', 'sur_refl_b03']);
var trueColorVis = {
min: -100.0,
max: 3000.0,
};
Map.setCenter(6.746, 46.529, 2);
Map.addLayer(trueColor, trueColorVis, 'True Color');