Pathfinder (from AVHRR) - AVHRRPF

Data Usage Guidance/Restrictions

The operational data for this datatype is available to all registered CLASS users. Pre-operational data may be restricted to authorized users. To become an authorized user, send a request to the CLASS Help Desk.

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Output

User option for the format of the output file. The valid formats are:

  • Plotted image GIF
  • Generic ASCII file
  • Spreadsheet
  • Tab-delimited file
  • Comma-delimited file
  • NetCDF file

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Spatial

Refers to the geographic area of interest to the user. This section of the search page allows the user to define the geographic area of interest.

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Temporal

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

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Variables

User option for values in the output Pathfinder (from AVHRR) file. The valid values for each file are:

  • Absorbed Solar Flux (clear/day)
  • Absorbed Solar Flux (total/day)
  • Aerosol Optical Thickness (day)
  • Outgoing Long Wave Radiation (clear/day)
  • Outgoing Long Wave Radiation (clear/night)
  • Outgoing Long Wave Radiation (total/day)
  • Outgoing Long Wave Radiation (total/night)
  • Total Fractional Cloud Coverage (day)
  • Total Fractional Cloud Coverage (night)

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UTC

Coordinated Universal Time (UTC) is the international time standard. It is the current term for what was referred to as Greenwich Meridian Time (GMT). Zero (0) hours UTC is midnight in Greenwich England, which lies on the zero longitudinal meridian. Universal time is based on a 24 hour clock, therefore, afternoon hours such as 4 pm UTC are expressed as 16:00 UTC (sixteen hours, zero minutes).

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