Specifying sensor and image settings

To specify sensor and image settings:

From the Atmospheric Correction workflows Tree List, select Sensor and image settings The Sensor and image settings panel appears.
In the Input Image Files section, click the down arrow beside the Multispectral field to display the multispectral files available in the open Focus data set. Alternatively, click Browse to select a file.
The wizard automatically populates the following workflow fields using the metadata tags from the input multispectral file:
- Sensor type: PlatformName
- Acquisition Date: Acquisition_Date or Acquisition_DateTime
- Solar zenith: AngleOfSolarElevation or SolarZenith
- Solar azimuth: SolarAzimuth
- Calibration coefficients and Band Setup: MinWavelength, MaxWavelength, WavelengthUnits, RadiometricTransOffset, RadiometricTransGain, RadiometricTransUnits , all at the channel level
  
  Note: If the RadiometricTransUnits tag is missing, units are assumed to be mW.cm-2.sr-1.um-1
If some or all of the metadata tags are missing from the file, they can be obtained by importing the file from the original raw dataset. See also steps 4 and 5.
Optionally, specify the path and file name of the associated Panchromatic file, or click Browse to select the file. If the specified sensor does not provide a panchromatic image, this field is disabled.
If the input file does not contain the appropriate metadata, you must calculate the solar zenith and azimuth values according to the image’s acquisition date, time, and nominal scene center.
From the Sensor Information section, click Calculate to display the Solar Calculation window, and enter the required information:
- Calculate solar angles
If the input file does not contain the appropriate metadata, the Calibration coefficients source field defaults to Manual Entry. You must either manually enter the required information, or import the data from a text file.
- Manually enter calibration information
- Import calibration information from a file
Note: You must verify all calibration coefficients before proceeding to another workflow. If you skip this step and this information is not available through metadata, the calibration offset and gain are assumed to be 0 and 1 respectively. These values are acceptable for haze removal, but will produce incorrect results for the TOA, cloud masking, ground reflectance, and surface temperature calculations.
In the Output Files section, specify the location of the output folder.
Click Browse to open the File Selector window, or type the path directly in the Folder field.

The specified directory will receive all output files from any of the atmospheric correction workflows. The directory must already exist and must be write-enabled.