The Aqua MODIS (Moderate Resolution Imaging Spectroradiometer) Surface Reflectance products provide an estimate of the surface spectral reflectance parameter as if it were measured at ground level in the absence of atmospheric scattering or absorption. The MODIS Level 1B (L1B) top-of-atmosphere calibrated instrument data are corrected for atmospheric gases and aerosols to produce this Level 2 (L2) product. These L2 inputs are used to generate higher-level gridded products.

MYD09 is the product short name for the L2 orbital swath-based atmospherically corrected surface reflectance product, generated daily at 250-meter, 500-meter and 1-kilometer resolutions. MYD09 contains 5-minute datasets for every 24-hour cycle that yields 288 granules.

Spectral Band Coverage

MYD09 offers surface reflectance values for the following resolutions and bands: 

• 250-meter resolution: Bands 1 and 2  
• 500-meter resolution: Bands 1 – 7
• 1-kilometer resolution: Bands 1 – 16 and Band 26

This product also contains multi-resolution Quality Assurance (QA) layers, and 1-kilometer observation statistics besides solar-zenith and view-zenith angles.

Product Validation and Data Record

The version 6.1 (v6.1) surface reflectance products are validated to Stage 3, meaning that the uncertainties in this product are well-quantified through comparison with both in situ (ground-based) measurements and other reference data. These uncertainties are characterized in a statistically rigorous manner over multiple global locations and time periods. The spatial and temporal consistency of this product has also been evaluated over a set of globally representative locations and time periods. The v6.1 MYD09 collection’s data record starts from July 4, 2002 (2002–185).

Science Data Sets

The L2 MYD09 product, in Hierarchical Data Format (HDF4), contains the following Science Data Sets (SDS):

1. 250m_Surface_Reflectance_Band_1
2. 250m_Surface_Reflectance_Band_2
3. 250m_Reflectance_Band_Quality
4. 500m_Surface_Reflectance_Band_1
5. 500m_Surface_Reflectance_Band_2
6. 500m_Surface_Reflectance_Band_3
7. 500m_Surface_Reflectance_Band_4
8. 500m_Surface_Reflectance_Band_5
9. 500m_Surface_Reflectance_Band_6
10. 500m_Surface_Reflectance_Band_7
11. 500m_Reflectance_Band_Quality
12. 1km_Surface_Reflectance_Band_1
13. 1km_Surface_Reflectance_Band_2
14. 1km_Surface_Reflectance_Band_3
15. 1km_Surface_Reflectance_Band_4
16. 1km_Surface_Reflectance_Band_5
17. 1km_Surface_Reflectance_Band_6
18. 1km_Surface_Reflectance_Band_7
19. 1km_Surface_Reflectance_Band_8
20. 1km_Surface_Reflectance_Band_9
21. 1km_Surface_Reflectance_Band_10
22. 1km_Surface_Reflectance_Band_11
23. 1km_Surface_Reflectance_Band_12
24. 1km_Surface_Reflectance_Band_13
25. 1km_Surface_Reflectance_Band_15
26. 1km_Surface_Reflectance_Band_16
27. 1km_Surface_Reflectance_Band_26
28. 1km_b16_Reflectance_Band_Quality
29. 1km_b8-15_Reflectance_Band_Quality
30. 1km_Band_3_Path_Radiance
31. 1km_Reflectance_Band_Quality
32. 1km_Reflectance_Data_State_QA
33. 1km_water_vapor
34. 1km_Atmospheric_Optical_Depth_Band_1
35. 1km_Atmospheric_Optical_Depth_Band_3
36. 1km_Atmospheric_Optical_Depth_Band_8
37. 1km_Atmospheric_Optical_Depth_Band_CM
38. 1km_Atmospheric_Optical_Depth_Band_QA
39. 1km_Atmospheric_Optical_Depth_Model
40. Band20
41. Band20Albedo
42. Band31
43. Band32