MOD09GQ.061 Terra Surface Reflectance Daily Global 250m

AI-generated Key Takeaways

• MOD09GQ v6.1 provides daily global surface reflectance data at 250m resolution for bands 1 (red) and 2 (near-infrared).

• The data is corrected for atmospheric effects, offering an estimate of surface reflectance as measured at ground level.

• It includes quality assurance layers and observation information for data reliability assessment.

• This product is meant to be used with MOD09GA, which contains important quality and viewing geometry information.

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

Dataset Availability

2000-02-24T00:00:00Z–2025-10-01T00:00:00Z

Dataset Provider

NASA LP DAAC at the USGS EROS Center

Earth Engine Snippet

ee.ImageCollection("MODIS/061/MOD09GQ")

Cadence

1 Day

Tags

daily global modis nasa satellite-imagery sr surface-reflectance terra usgs

mod09gq

Description

The MODIS Surface Reflectance products provide an estimate of the surface spectral reflectance as it would be measured at ground level in the absence of atmospheric scattering or absorption. Low-level data are corrected for atmospheric gases and aerosols. MOD09GQ version 6.1 provides bands 1 and 2 at a 250m resolution in a daily gridded L2G product in the Sinusoidal projection, including a QC and five observation layers. This product is meant to be used in conjunction with the MOD09GA where important quality and viewing geometry information is stored.

Documentation:

• User's Guide

• Algorithm Theoretical Basis Document (ATBD)

• General Documentation

Bands

Pixel Size
250 meters

Bands

Name	Min	Max	Scale	Pixel Size	Wavelength	Description
num_observations	0	127		meters	None	Number of observations per 250m pixel
sur_refl_b01	-100	16000	0.0001	meters	620-670nm	Surface reflectance band 1
sur_refl_b02	-100	16000	0.0001	meters	841-876nm	Surface reflectance for band 2
QC_250m				meters	None	Surface reflectance quality assurance
Bitmask for QC_250m 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 2-3: Spare (unused) 0: N/A Bits 4-7: Band 1 data quality 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 8-11: Band 2 data quality 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 12: Atmospheric correction performed 0: No 1: Yes Bit 13: Adjacency correction performed 0: No 1: Yes Bits 14-15: Spare (unused) 0: N/A
obscov	0	100	0.01	meters	None	Observation coverage percent
iobs_res	0	254		meters	None	Observation number
orbit_pnt	0	15		meters	None	Orbit pointer
granule_pnt	0	254		meters	None	Granule pointer

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/MOD09GQ.061

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Code Editor (JavaScript)

var dataset = ee.ImageCollection('MODIS/061/MOD09GQ')
                  .filter(ee.Filter.date('2018-01-01', '2018-05-01'));
var falseColorVis = {
  min: -100.0,
  max: 8000.0,
  bands: ['sur_refl_b02', 'sur_refl_b02', 'sur_refl_b01'],
};
Map.setCenter(6.746, 46.529, 2);
Map.addLayer(dataset, falseColorVis, 'False Color');

Open in Code Editor

MOD09GQ.061 Terra Surface Reflectance Daily Global 250m

The MODIS Surface Reflectance products provide an estimate of the surface spectral reflectance as it would be measured at ground level in the absence of atmospheric scattering or absorption. Low-level data are corrected for atmospheric gases and aerosols. MOD09GQ version 6.1 provides bands 1 and 2 at a 250m resolution …

MODIS/061/MOD09GQ, daily,global,modis,nasa,satellite-imagery,sr,surface-reflectance,terra,usgs

2000-02-24T00:00:00Z/2025-10-01T00:00:00Z

-90 -180 90 180

Google Earth Engine

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

• https://doi.org/10.5067/MODIS/MOD09GQ.061
• https://doi.org/10.5067/MODIS/MOD09GQ.061