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

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

            -              Overview           
            -              Science           
            -              Web Tools           

The National Centers for Environmental Prediction (NCEP)/National Center for Atmospheric Research (NCAR)  Reanalysis****1 products are annual Network Common Data Form (netCDF) files, which contain the daily values for each surface pressure, precipitable water, and air temperature. NCEP data are used in the surface reflectance algorithm for Landsat 4-7 data. 

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 repackages information from three source Reanalysis product files into a daily HDF file that contains Scientific Data Sets  (SDSs) for surface pressure (“slp”), precipitable water (“pr_wtr”), and air temperature (“air”), stored as floating-point values. These global products are 2.5° x 2.5° lat/long grids from 90° N to 90° S, and 0° E to 357.5° E. Each grid position contains four daily values from 0Z, 6Z, 12Z, and 18Z. The repackaged file also contains “lat” and “lon” SDSs that contain the latitude and longitude value along each grid axis.

### **Additional Information**

                                - 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 NCEP/NCAR Reanalysis C2 Subset Product. The data are located under the Landsat category, Atmospheric Auxiliary Data, and listed as NCEP/NCAR Reanalysis C2 Subset.

### Digital Object Identifier (DOI)

Atmospheric Auxiliary Data – NCEP/NCAR Reanalysis C2 Subset Digital Object Identifier number (DOI): /10.5066/P9Y9CG3P

### 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
                      - NCEP/NCAR Reanalysis C2

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 - MODIS Fused C2              

Earth Resources Observation and Science (EROS) Center 

link

June 28, 2021

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

The National Centers for Environmental Prediction (NCEP)/National Center for Atmospheric Research (NCAR)  Reanalysis****1 products are annual Network Common Data Form (netCDF) files, which contain the daily values for each surface pressure, precipitable water, and air temperature. NCEP data are used in the surface reflectance algorithm for Landsat 4-7 data. 

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 repackages information from three source Reanalysis product files into a daily HDF file that contains Scientific Data Sets  (SDSs) for surface pressure (“slp”), precipitable water (“pr_wtr”), and air temperature (“air”), stored as floating-point values. These global products are 2.5° x 2.5° lat/long grids from 90° N to 90° S, and 0° E to 357.5° E. Each grid position contains four daily values from 0Z, 6Z, 12Z, and 18Z. The repackaged file also contains “lat” and “lon” SDSs that contain the latitude and longitude value along each grid axis.

### **Additional Information**

                                - 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 NCEP/NCAR Reanalysis C2 Subset Product. The data are located under the Landsat category, Atmospheric Auxiliary Data, and listed as NCEP/NCAR Reanalysis C2 Subset.

### Digital Object Identifier (DOI)

Atmospheric Auxiliary Data – NCEP/NCAR Reanalysis C2 Subset Digital Object Identifier number (DOI): /10.5066/P9Y9CG3P

### 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
                      - NCEP/NCAR Reanalysis C2

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 - MODIS Fused C2              

Earth Resources Observation and Science (EROS) Center 

link

June 28, 2021

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