MOD09Q1.061 Terra Surface Reflectance 8-Day Global 250m

AI-generated Key Takeaways

The MOD09Q1 product provides an estimate of the surface spectral reflectance of bands 1 and 2 at 250m resolution, corrected for atmospheric conditions.
This dataset is available from 2000-02-18 to 2025-10-08 with an 8-day cadence.
The product includes surface reflectance bands and quality layers selected based on factors like observation coverage, view angle, cloud absence, and aerosol loading.
MODIS data and products acquired through the LP DAAC have no restrictions on subsequent use, sale, or redistribution.

Dataset Availability: 2000-02-18T00:00:00Z–2025-10-24T00:00:00Z
Dataset Provider: NASA LP DAAC at the USGS EROS Center

Cadence: 8 Days
Tags: 8-day global mod09q1 modis nasa satellite-imagery sr surface-reflectance terra usgs

Description

The MOD09Q1 product provides an estimate of the surface spectral reflectance of bands 1 and 2 at 250m resolution and corrected for atmospheric conditions such as gasses, aerosols, and Rayleigh scattering. Along with the two reflectance bands, a quality layer is also included. 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:

Bands

Pixel Size
250 meters

Bands

Name	Min	Max	Scale	Pixel Size	Wavelength	Description
`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
`State`				meters	None	Surface reflectance 250m state flags
Bitmask for State 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
`QA`				meters	None	Surface reflectance 250m band quality control flags
Bitmask for 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 2-3: 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 Bit 14: Different orbit from 500m 0: No 1: Yes Bit 15: Spare (unused) 0: N/A

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

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

DOIs

https://doi.org/10.5067/MODIS/MOD09Q1.061

Explore with Earth Engine

Code Editor (JavaScript)

var dataset = ee.ImageCollection('MODIS/061/MOD09Q1')
                  .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

MOD09Q1.061 Terra Surface Reflectance 8-Day Global 250m

MODIS/061/MOD09Q1, 8-day,global,mod09q1,modis,nasa,satellite-imagery,sr,surface-reflectance,terra,usgs

2000-02-18T00:00:00Z/2025-10-24T00:00:00Z

-90 -180 90 180

Google Earth Engine

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

MOD09Q1.061 Terra Surface Reflectance 8-Day Global 250m Stay organized with collections Save and categorize content based on your preferences.

AI-generated Key Takeaways

Description

Bands

Terms of Use

Citations

DOIs

Explore with Earth Engine

Code Editor (JavaScript)

MOD09Q1.061 Terra Surface Reflectance 8-Day Global 250m