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

Page Summary

• The MYD09CMG Version 6.1 product provides corrected surface spectral reflectance data from Aqua MODIS Bands 1 through 7 at 5600 meter resolution.

• This dataset includes 25 layers, featuring surface reflectance bands, brightness temperature data, and quality assurance bands.

• There is a known striping issue in Band 5 due to a dead detector, which is flagged in the QA layer and expected to be fixed in Collection 7.

• The data is available from 2002-07-04 to 2025-10-14 with a daily cadence.

• MODIS data acquired through the LP DAAC has no restrictions on use, sale, or redistribution.

Dataset Availability

2002-07-04T00:00:00Z–2026-03-16T00:00:00Z

Dataset Producer

NASA LP DAAC at the USGS EROS Center

Earth Engine Snippet

ee.ImageCollection("MODIS/061/MYD09CMG")

Cadence

1 Day

Tags

aqua brightness-temperature ozone satellite-imagery 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.

Note that scale factors and offsets described in the MODIS documentation for MYD09CMG bands are already applied to assets ingested into Earth Engine.

Documentation:

• User's Guide

• Algorithm Theoretical Basis Document (ATBD)

• General Documentation

Bands

Bands

Pixel size: 5600 meters (all bands)

Name	Units	Min	Max	Pixel Size	Wavelength	Description
Coarse_Resolution_Surface_Reflectance_Band_1	Dimensionless	-0.01	1.6	5600 meters	620-670nm	Surface reflectance for band 1
Coarse_Resolution_Surface_Reflectance_Band_2	Dimensionless	-0.01	1.6	5600 meters	841-876nm	Surface reflectance for band 2
Coarse_Resolution_Surface_Reflectance_Band_3	Dimensionless	-0.01	1.6	5600 meters	459-479nm	Surface reflectance for band 3
Coarse_Resolution_Surface_Reflectance_Band_4	Dimensionless	-0.01	1.6	5600 meters	545-565nm	Surface reflectance for band 4
Coarse_Resolution_Surface_Reflectance_Band_5	Dimensionless	-0.01	1.6	5600 meters	1230-1250nm	Surface reflectance for band 5
Coarse_Resolution_Surface_Reflectance_Band_6	Dimensionless	-0.01	1.6	5600 meters	1628-1652nm	Surface reflectance for band 6
Coarse_Resolution_Surface_Reflectance_Band_7	Dimensionless	-0.01	1.6	5600 meters	2105-2155nm	Surface reflectance for band 7
Coarse_Resolution_Solar_Zenith_Angle	deg	0	180	5600 meters	None	Solar Zenith Angle
Coarse_Resolution_View_Zenith_Angle	deg	0	180	5600 meters	None	View Zenith Angle
Coarse_Resolution_Relative_Azimuth_Angle	deg	-180	180	5600 meters	None	Relative Azimuth Angle
Coarse_Resolution_Ozone	atm cm	0.0025	0.6375	5600 meters	None	Ozone Resolution
Coarse_Resolution_Brightness_Temperature_Band_20	K	0.01	400	5600 meters	3.360-3.840µm	Band 20 Brightness Temperature
Coarse_Resolution_Brightness_Temperature_Band_21	K	0.01	400	5600 meters	3.929-3.989µm	Band 21 Brightness Temperature
Coarse_Resolution_Brightness_Temperature_Band_31	K	0.01	400	5600 meters	10.780-11.280µm	Band 31 Brightness Temperature
Coarse_Resolution_Brightness_Temperature_Band_32	K	0.01	400	5600 meters	11.770-12.270µm	Band 32 Brightness Temperature
Coarse_Resolution_Granule_Time		1	2355	5600 meters	None	Granule time of day, as HHMM
Coarse_Resolution_Band_3_Path_Radiance	Dimensionless	-0.01	1.6	5600 meters	None	Band 3 Radiance
Coarse_Resolution_QA				5600 meters	None	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				5600 meters	None	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				5600 meters	None	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				5600 meters	None	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	5600 meters	None	Number of 500m pixels used in average
number_of_500m_rej_detector		1	100	5600 meters	None	Number of 500m pixels rejected for use
number_of_250m_pixels_averaged_b1-2		1	640	5600 meters	None	Number of 250m pixels used in b1-2 average
n_pixels_averaged		1	40	5600 meters	None	Number of pixels used in average

Terms of Use

Terms of Use

MODIS data and products acquired through the LP DAAC have no restrictions on subsequent use, sale, or redistribution.

Citations

Citations:

• Please visit LP DAAC 'Citing Our Data' page for information on citing LP DAAC datasets.

DOIs

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

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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');

Open in Code Editor

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

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/061/MYD09CMG, aqua,brightness-temperature,ozone,satellite-imagery,surface-reflectance

2002-07-04T00:00:00Z/2026-03-16T00:00:00Z

-90 -180 90 180

Google Earth Engine

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

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