MYD09CMG.061 Aqua Surface Reflectance Daily L3 Global 0.05 Deg CMG

Dataset Availability: 2002-07-04T00:00:00Z–2025-01-27T00:00:00Z
Dataset Provider: NASA LP DAAC at the USGS EROS Center
Earth Engine Snippet: ee.ImageCollection("MODIS/061/MYD09CMG")

Cadence: 1 Day
Tags: aqua brightness-temperature ozone surface-reflectance

Description

The MYD09CMG Version 6.1 product provides an estimate of the surface spectral reflectance of Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) Bands 1 through 7, resampled to 5600 meter pixel resolution and corrected for atmospheric conditions such as gasses, aerosols, and Rayleigh scattering. The MYD09CMG data product provides 25 layers including MODIS bands 1 through 7; Brightness Temperature data from thermal bands 20, 21, 31, and 32; along with Quality Assurance (QA) and observation bands. This product is based on a Climate Modeling Grid (CMG) for use in climate simulation models.

This dataset has a striping issue originating from Band 5’s dead detector 20. The MYD09/Band 5 show the dead detector striping in band 5, but it has been properly flagged in the QA layer. The science team has been notified and the issue will be addressed in the Collection 7. More details can be found on the known issue page.

Documentation:

Bands

Pixel Size
500 meters

Bands

Name	Units	Min	Max	Wavelength	Description
`Coarse_Resolution_Surface_Reflectance_Band_1`	Dimensionless	-0.01	1.6	620-670nm	Surface reflectance for band 1
`Coarse_Resolution_Surface_Reflectance_Band_2`	Dimensionless	-0.01	1.6	841-876nm	Surface reflectance for band 2
`Coarse_Resolution_Surface_Reflectance_Band_3`	Dimensionless	-0.01	1.6	459-479nm	Surface reflectance for band 3
`Coarse_Resolution_Surface_Reflectance_Band_4`	Dimensionless	-0.01	1.6	545-565nm	Surface reflectance for band 4
`Coarse_Resolution_Surface_Reflectance_Band_5`	Dimensionless	-0.01	1.6	1230-1250nm	Surface reflectance for band 5
`Coarse_Resolution_Surface_Reflectance_Band_6`	Dimensionless	-0.01	1.6	1628-1652nm	Surface reflectance for band 6
`Coarse_Resolution_Surface_Reflectance_Band_7`	Dimensionless	-0.01	1.6	2105-2155nm	Surface reflectance for band 7
`Coarse_Resolution_Solar_Zenith_Angle`	deg	0	180		Solar Zenith Angle
`Coarse_Resolution_View_Zenith_Angle`	deg	0	180		View Zenith Angle
`Coarse_Resolution_Relative_Azimuth_Angle`	deg	-180	180		Relative Azimuth Angle
`Coarse_Resolution_Ozone`	atm cm	0.0025	0.6375		Ozone Resolution
`Coarse_Resolution_Brightness_Temperature_Band_20`	K	0.01	400	3.360-3.840µm	Band 20 Brightness Temperature
`Coarse_Resolution_Brightness_Temperature_Band_21`	K	0.01	400	3.929-3.989µm	Band 21 Brightness Temperature
`Coarse_Resolution_Brightness_Temperature_Band_31`	K	0.01	400	10.780-11.280µm	Band 31 Brightness Temperature
`Coarse_Resolution_Brightness_Temperature_Band_32`	K	0.01	400	11.770-12.270µm	Band 32 Brightness Temperature
`Coarse_Resolution_Granule_Time`		1	2355		Granule time of day, as HHMM
`Coarse_Resolution_Band_3_Path_Radiance`	Dimensionless	-0.01	1.6		Band 3 Radiance
`Coarse_Resolution_QA`					Quality Assurance
Bitmask for Coarse_Resolution_QA 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 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 quality 7: Noisy detector 8: Dead detector, data interpolated in L1B 9: Solar zenith >= 86 degrees 10: Solar zenith >= 85 and < 86 degrees 11: Missing input 12: Internal constant used in place of climatological data for at least one atmospheric constant 13: Correction out of bounds, pixel constrained to extreme allowable value 14: L1B data faulty 15: Not processed due to deep ocean or clouds Bits 6-9: Band 2 data quality, four bit range 0: Highest quality 7: Noisy detector 8: Dead detector, data interpolated in L1B 9: Solar zenith >= 86 degrees 10: Solar zenith >= 85 and < 86 degrees 11: Missing input 12: Internal constant used in place of climatological data for at least one atmospheric constant 13: Correction out of bounds, pixel constrained to extreme allowable value 14: L1B data faulty 15: Not processed due to deep ocean or clouds Bits 10-13: Band 3 data quality, four bit range 0: Highest quality 7: Noisy detector 8: Dead detector, data interpolated in L1B 9: Solar zenith >= 86 degrees 10: Solar zenith >= 85 and < 86 degrees 11: Missing input 12: Internal constant used in place of climatological data for at least one atmospheric constant 13: Correction out of bounds, pixel constrained to extreme allowable value 14: L1B data faulty 15: Not processed due to deep ocean or clouds Bits 14-17: Band 4 data quality, four bit range 0: Highest quality 7: Noisy detector 8: Dead detector, data interpolated in L1B 9: Solar zenith >= 86 degrees 10: Solar zenith >= 85 and < 86 degrees 11: Missing input 12: Internal constant used in place of climatological data for at least one atmospheric constant 13: Correction out of bounds, pixel constrained to extreme allowable value 14: L1B data faulty 15: Not processed due to deep ocean or clouds Bits 18-21: Band 5 data quality, four bit range 0: Highest quality 7: Noisy detector 8: Dead detector, data interpolated in L1B 9: Solar zenith >= 86 degrees 10: Solar zenith >= 85 and < 86 degrees 11: Missing input 12: Internal constant used in place of climatological data for at least one atmospheric constant 13: Correction out of bounds, pixel constrained to extreme allowable value 14: L1B data faulty 15: Not processed due to deep ocean or clouds Bits 22-25: Band 6 data quality, four bit range 0: Highest quality 7: Noisy detector 8: Dead detector, data interpolated in L1B 9: Solar zenith >= 86 degrees 10: Solar zenith >= 85 and < 86 degrees 11: Missing input 12: Internal constant used in place of climatological data for at least one atmospheric constant 13: Correction out of bounds, pixel constrained to extreme allowable value 14: L1B data faulty 15: Not processed due to deep ocean or clouds Bits 26-29: Band 7 data quality, four bit range 0: Highest quality 7: Noisy detector 8: Dead detector, data interpolated in L1B 9: Solar zenith >= 86 degrees 10: Solar zenith >= 85 and < 86 degrees 11: Missing input 12: Internal constant used in place of climatological data for at least one atmospheric constant 13: Correction out of bounds, pixel constrained to extreme allowable value 14: L1B data faulty 15: Not processed due to deep ocean or clouds Bit 30: Atmospheric correction performed 0: No 1: Yes Bit 31: Adjacency correction performed 0: No 1: Yes
`Coarse_Resolution_Internal_CM`					Internal Cloud Mask
Bitmask for Coarse_Resolution_Internal_CM Bit 0: Cloudy 0: No 1: Yes Bit 1: Clear 0: No 1: Yes Bit 2: High clouds 0: No 1: Yes Bit 3: Low clouds 0: No 1: Yes Bit 4: Snow 0: No 1: Yes Bit 5: Fire 0: No 1: Yes Bit 6: Sun glint 0: No 1: Yes Bit 7: Dust 0: No 1: Yes Bit 8: Cloud shadow 0: No 1: Yes Bit 9: Pixel is adjacent to cloud 0: No 1: Yes Bits 10-11: Cirrus 0: None 1: Small 2: Average 3: High Bit 12: Pan flag 0: No salt pan 1: Salt pan Bit 13: Criteria used for aerosol retrieval 0: Criterion 1 1: Criterion 2 Bit 14: AOT (aerosol optical thickness) has climatological values 0: No 1: Yes Bit 15: Pixel has interpolated TR, PR or SA data 0: No 1: Yes
`Coarse_Resolution_State_QA`					State Quality Assurance
Bitmask for Coarse_Resolution_State_QA 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: Internal cloud algorithm flag 0: No cloud 1: Cloud Bit 11: Internal fire algorithm flag 0: No fire 1: Fire Bit 12: MOD35 snow/ice flag 0: No 1: Yes Bit 13: Pixel is adjacent to cloud 0: No 1: Yes Bit 14: BRDF correction performed data 0: No 1: Yes Bit 15: Internal snow mask 0: No snow 1: Snow
`Coarse_Resolution_Number_Mapping`					Number Mapping Cloud/Snow
Bitmask for Coarse_Resolution_Number_Mapping Bits 0-7: Number of pixel mapping flagged as cloudy Bits 8-15: Number of pixel mapping flagged as cloud shadow Bits 16-23: Number of pixel mapping flagged as adjacent to cloud Bits 24-31: Number of pixel mapping flagged for snow
`number_of_500m_pixels_averaged_b3`		1	200		Number of 500m pixels used in average
`number_of_500m_rej_detector`		1	100		Number of 500m pixels rejected for use
`number_of_250m_pixels_averaged_b1-2`		1	640		Number of 250m pixels used in b1-2 average
`n_pixels_averaged`		1	40		Number of pixels used in average

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Citations

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DOIs

https://doi.org/10.5067/MODIS/MYD09CMG.061

Explore with Earth Engine

Code Editor (JavaScript)

var dataset = ee.ImageCollection('MODIS/061/MYD09CMG')
                  .filter(ee.Filter.date('2018-01-01', '2018-05-01'));
var trueColor =
    dataset.select([
      'Coarse_Resolution_Surface_Reflectance_Band_1',
      'Coarse_Resolution_Surface_Reflectance_Band_2',
      'Coarse_Resolution_Surface_Reflectance_Band_3'
      ]);
var trueColorVis = {
  min: -0.4,
  max: 1.0,
};
Map.setCenter(6.746, 46.529, 6);
Map.addLayer(trueColor, trueColorVis, 'True Color');

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MYD09CMG.061 Aqua Surface Reflectance Daily L3 Global 0.05 Deg CMG

MODIS/061/MYD09CMG, aqua,brightness-temperature,ozone,surface-reflectance

2002-07-04T00:00:00Z/2025-01-27T00:00:00Z

Google Earth Engine

https://developers.google.com/earth-engine/datasets

https://doi.org/10.5067/MODIS/MYD09CMG.061