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#           USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - MODIS Fused C2      

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      By Earth Resources Observation and Science (EROS) Center       June 28, 2021    

            -              Overview           
            -              Science           
            -              Web Tools           

MODIS Fused C2 is a fused product of water vapor and ozone data used to process Landsat Collection 2 Level-2 products. This product contains four MODIS data sets:  MODIS Aerosol Optical Thickness Daily Climate Modeling Grid (MOD09CMA and MYD09CMA) and MODIS SR Daily Climate Modeling Grid (MOD09CMG and MYD09CMG).

Back to Products Overview

These data are available for users wanting to generate custom Level-2 products using the Collection 2 surface reflectance and surface temperature algorithms. **It is not necessary for users to download the atmospheric auxiliary data for use with Collection 2 Level-2 products. **

The USGS extracts water vapor data and ozone data as needed from all four MODIS data sets (MOD09CMA, MYD09CMA, MOD09CMG, MYD09CMG) and combines the data to create a single daily Hierarchical Data Format (HDF) release file that contains only water vapor and ozone values. Terra data are used if available for both water vapor and ozone data. Where Terra data are not available, Aqua data (if available) are used to fill in missing values. If Terra data and Aqua data are both unavailable, fill values are generated by interpolation.  **Note:** **MODIS products were updated from version 6.0 to 6.1 on February 17, 2023.**

The fused file contains a Scientific Data Set (SDS) for ozone data (unsigned 8-bit integers), an SDS for water vapor data (unsigned 16-bit integers), and a "wherefrom" SDS (8-bit unsigned integers) to identify if the pixel is filled from Terra data, Aqua data, or "none" for interpolated values.

### **Additional Information**

                                - MOD09CMA
                                - MYD09CMA
                                - MOD09CMG
                                - MYD09CMG
                                - Landsat Collection 2 Atmospheric Auxiliary Home Page
                                - Landsat Atmospheric Auxiliary Data - Data Format Control Book (DFCB) 

### **Access Data**

Use EarthExplorer to search and download the MODIS Fused C2 Product. The data are located under the Landsat category, Atmospheric Auxiliary Data, and listed as MODIS Fused C2.

### **Digital Object Identifier (DOI)**

Atmospheric Auxiliary Data – MODIS Fused C2 Digital Object Identifier number (DOI): /10.5066/P9ISIQC9

### Contacts

#### USGS EROS Customer Services 

custserv@usgs.gov

1-800-252-4547

### Explore Search

                      - Landsat 
                      - Products and Datasets
                      - Remote Sensing
                      - Remote Sensing Research and Development
                      - Information Systems
                      - Maps and Mapping
                      - Landsat Atmospheric Auxiliary
                      - MODIS FUSED

View All **

Below are other science projects associated with this product.

link

June 28, 2021

####                 USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - TOMS C2              

Earth Resources Observation and Science (EROS) Center 

link

June 28, 2021

####   USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - TOMS C2

Learn More

link

June 28, 2021

####                 USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - NCEP/NCAR Reanalysis C2              

Earth Resources Observation and Science (EROS) Center 

link

June 28, 2021

####   USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - NCEP/NCAR Reanalysis C2

Learn More

link

June 28, 2021

####                 USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - MERRA-2 C2              

Earth Resources Observation and Science (EROS) Center 

link

June 28, 2021

####   USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - MERRA-2 C2

Learn More

link

June 28, 2021

####                 USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - GEOS-5 FP-IT C2              

Earth Resources Observation and Science (EROS) Center 

link

June 28, 2021

####   USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - GEOS-5 FP-IT C2

Learn More

link

June 28, 2021

####                 USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - ASTER GED C2              

Earth Resources Observation and Science (EROS) Center 

link

June 28, 2021

####   USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - ASTER GED C2

Learn More

link

November 27, 2020

####                 USGS EROS Archive - Landsat Archives - Landsat 8-9 OLI/TIRS Collection 2 Level-2  Science Products              

Earth Resources Observation and Science (EROS) Center 

link

November 27, 2020

####   USGS EROS Archive - Landsat Archives - Landsat 8-9 OLI/TIRS Collection 2 Level-2  Science Products

Learn More

link

March 4, 2020

####                 USGS EROS Archive - Landsat Archives - Landsat 7 ETM Plus Collection 2 Level-2 Science Products              

Earth Resources Observation and Science (EROS) Center 

link

March 4, 2020

####   USGS EROS Archive - Landsat Archives - Landsat 7 ETM Plus Collection 2 Level-2 Science Products

Learn More

link

March 4, 2020

####                 USGS EROS Archive - Landsat Archives - Landsat 4-5  TM Collection 2 Level-2 Science Products              

Earth Resources Observation and Science (EROS) Center 

link

March 4, 2020

####   USGS EROS Archive - Landsat Archives - Landsat 4-5  TM Collection 2 Level-2 Science Products

Learn More

Below are data or web applications associated with this product.

November 9, 2022

####                 EarthExplorer              

The EarthExplorer (EE) user interface is an online search, discovery, and ordering tool developed by the United States Geological Survey (USGS). EE supports the searching of satellite, aircraft, and other remote sensing inventories through interactive and textual-based query capabilities. 

Earth Resources Observation and Science (EROS) Center , Commercial Remote Sensing Space Policy, Landsat Missions, Coastal National Elevation Database (CoNED) Applications Project, Elevation Derivatives for National Applications (EDNA), Land Change Monitoring, Assessment, and Projection, Significant Topographic Changes in the United States

MODIS Fused C2 is a fused product of water vapor and ozone data used to process Landsat Collection 2 Level-2 products. This product contains four MODIS data sets:  MODIS Aerosol Optical Thickness Daily Climate Modeling Grid (MOD09CMA and MYD09CMA) and MODIS SR Daily Climate Modeling Grid (MOD09CMG and MYD09CMG).

Back to Products Overview

These data are available for users wanting to generate custom Level-2 products using the Collection 2 surface reflectance and surface temperature algorithms. **It is not necessary for users to download the atmospheric auxiliary data for use with Collection 2 Level-2 products. **

The USGS extracts water vapor data and ozone data as needed from all four MODIS data sets (MOD09CMA, MYD09CMA, MOD09CMG, MYD09CMG) and combines the data to create a single daily Hierarchical Data Format (HDF) release file that contains only water vapor and ozone values. Terra data are used if available for both water vapor and ozone data. Where Terra data are not available, Aqua data (if available) are used to fill in missing values. If Terra data and Aqua data are both unavailable, fill values are generated by interpolation.  **Note:** **MODIS products were updated from version 6.0 to 6.1 on February 17, 2023.**

The fused file contains a Scientific Data Set (SDS) for ozone data (unsigned 8-bit integers), an SDS for water vapor data (unsigned 16-bit integers), and a "wherefrom" SDS (8-bit unsigned integers) to identify if the pixel is filled from Terra data, Aqua data, or "none" for interpolated values.

### **Additional Information**

                                - MOD09CMA
                                - MYD09CMA
                                - MOD09CMG
                                - MYD09CMG
                                - Landsat Collection 2 Atmospheric Auxiliary Home Page
                                - Landsat Atmospheric Auxiliary Data - Data Format Control Book (DFCB) 

### **Access Data**

Use EarthExplorer to search and download the MODIS Fused C2 Product. The data are located under the Landsat category, Atmospheric Auxiliary Data, and listed as MODIS Fused C2.

### **Digital Object Identifier (DOI)**

Atmospheric Auxiliary Data – MODIS Fused C2 Digital Object Identifier number (DOI): /10.5066/P9ISIQC9

### Contacts

#### USGS EROS Customer Services 

custserv@usgs.gov

1-800-252-4547

### Explore Search

                      - Landsat 
                      - Products and Datasets
                      - Remote Sensing
                      - Remote Sensing Research and Development
                      - Information Systems
                      - Maps and Mapping
                      - Landsat Atmospheric Auxiliary
                      - MODIS FUSED

View All **

Below are other science projects associated with this product.

link

June 28, 2021

####                 USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - TOMS C2              

Earth Resources Observation and Science (EROS) Center 

link

June 28, 2021

####   USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - TOMS C2

Learn More

link

June 28, 2021

####                 USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - NCEP/NCAR Reanalysis C2              

Earth Resources Observation and Science (EROS) Center 

link

June 28, 2021

####   USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - NCEP/NCAR Reanalysis C2

Learn More

link

June 28, 2021

####                 USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - MERRA-2 C2              

Earth Resources Observation and Science (EROS) Center 

link

June 28, 2021

####   USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - MERRA-2 C2

Learn More

link

June 28, 2021

####                 USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - GEOS-5 FP-IT C2              

Earth Resources Observation and Science (EROS) Center 

link

June 28, 2021

####   USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - GEOS-5 FP-IT C2

Learn More

link

June 28, 2021

####                 USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - ASTER GED C2              

Earth Resources Observation and Science (EROS) Center 

link

June 28, 2021

####   USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - ASTER GED C2

Learn More

link

November 27, 2020

####                 USGS EROS Archive - Landsat Archives - Landsat 8-9 OLI/TIRS Collection 2 Level-2  Science Products              

Earth Resources Observation and Science (EROS) Center 

link

November 27, 2020

####   USGS EROS Archive - Landsat Archives - Landsat 8-9 OLI/TIRS Collection 2 Level-2  Science Products

Learn More

link

March 4, 2020

####                 USGS EROS Archive - Landsat Archives - Landsat 7 ETM Plus Collection 2 Level-2 Science Products              

Earth Resources Observation and Science (EROS) Center 

link

March 4, 2020

####   USGS EROS Archive - Landsat Archives - Landsat 7 ETM Plus Collection 2 Level-2 Science Products

Learn More

link

March 4, 2020

####                 USGS EROS Archive - Landsat Archives - Landsat 4-5  TM Collection 2 Level-2 Science Products              

Earth Resources Observation and Science (EROS) Center 

link

March 4, 2020

####   USGS EROS Archive - Landsat Archives - Landsat 4-5  TM Collection 2 Level-2 Science Products

Learn More

Below are data or web applications associated with this product.

November 9, 2022

####                 EarthExplorer              

The EarthExplorer (EE) user interface is an online search, discovery, and ordering tool developed by the United States Geological Survey (USGS). EE supports the searching of satellite, aircraft, and other remote sensing inventories through interactive and textual-based query capabilities. 

Earth Resources Observation and Science (EROS) Center , Commercial Remote Sensing Space Policy, Landsat Missions, Coastal National Elevation Database (CoNED) Applications Project, Elevation Derivatives for National Applications (EDNA), Land Change Monitoring, Assessment, and Projection, Significant Topographic Changes in the United States