MYD09GA.061 Aqua Surface Reflectance Daily Global 1km and 500m

  • MYD09GA provides daily surface reflectance data from the MODIS sensor on the Aqua satellite, corrected for atmospheric effects.

  • The data is available globally at 1km and 500m resolutions, with bands spanning the visible to shortwave infrared spectrum.

  • It includes quality assurance layers for cloud masking and other atmospheric conditions.

  • The dataset is freely available for use with no restrictions, provided by NASA LP DAAC at the USGS EROS Center.

  • Users can access and analyze this data through Google Earth Engine.
MODIS/061/MYD09GA
Dataset Availability
2002-07-04T00:00:00Z–2025-10-03T00:00:00Z
Dataset Provider
Earth Engine Snippet
ee.ImageCollection("MODIS/061/MYD09GA")
Cadence
1 Day
Tags
aqua daily global modis nasa satellite-imagery sr surface-reflectance usgs
myd09ga

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. MYD09GA version 6.1 provides bands 1-7 in a daily gridded L2G product in the sinusoidal projection, including 500m reflectance values and 1km observation and geolocation statistics.

Documentation:

Bands

Bands

Name Units Min Max Scale Pixel Size Wavelength Description
num_observations_1km 2 127 1000 meters None

Number of observations per 1K pixel
state_1km 1000 meters None

Reflectance data state QA
SensorZenith deg 0 18000 0.01 1000 meters None

Sensor zenith angle
SensorAzimuth deg -18000 18000 0.01 1000 meters None

Sensor azimuth angle
Range m 27000 65535 25 1000 meters None

Distance to sensor
SolarZenith deg 0 18000 0.01 1000 meters None

Solar zenith angle
SolarAzimuth deg -18000 18000 0.01 1000 meters None

Solar azimuth angle
gflags 1000 meters None

Geolocation flags
orbit_pnt 0 15 1000 meters None

Orbit pointer
granule_pnt 0 254 1000 meters None

Granule pointer
num_observations_500m 0 127 500 meters None

Number of observations
sur_refl_b01 -100 16000 0.0001 500 meters 620-670nm

Surface reflectance for band 1
sur_refl_b02 -100 16000 0.0001 500 meters 841-876nm

Surface reflectance for band 2
sur_refl_b03 -100 16000 0.0001 500 meters 459-479nm

Surface reflectance for band 3
sur_refl_b04 -100 16000 0.0001 500 meters 545-565nm

Surface reflectance for band 4
sur_refl_b05 -100 16000 0.0001 500 meters 1230-1250nm

Surface reflectance for band 5
sur_refl_b06 -100 16000 0.0001 500 meters 1628-1652nm

Surface reflectance for band 6
sur_refl_b07 -100 16000 0.0001 500 meters 2105-2155nm

Surface reflectance for band 7
QC_500m 500 meters None

Surface reflectance quality assurance
obscov_500m 0 100 500 meters None

Observation coverage percent
iobs_res 0 254 500 meters None

Observation number in coarser grid
q_scan 500 meters None

250m scan value information

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:

DOIs

Explore with Earth Engine

Code Editor (JavaScript)

var dataset = ee.ImageCollection('MODIS/061/MYD09GA')
                  .filter(ee.Filter.date('2018-04-01', '2018-06-01'));
var trueColor143 =
    dataset.select(['sur_refl_b01', 'sur_refl_b04', 'sur_refl_b03']);
var trueColor143Vis = {
  min: -100.0,
  max: 8000.0,
};
Map.setCenter(-7.03125, 31.0529339857, 2);
Map.addLayer(trueColor143, trueColor143Vis, 'True Color (143)');
Open in Code Editor
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. MYD09GA version 6.1 provides bands 1-7 in a daily gridded L2G product …
MODIS/061/MYD09GA, aqua,daily,global,modis,nasa,satellite-imagery,sr,surface-reflectance,usgs
2002-07-04T00:00:00Z/2025-10-03T00:00:00Z
-90 -180 90 180
Google Earth Engine