AVHRR Enterprise Clouds (CLOUDS)

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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Dataset Name

The dataset name has the basic format:

AVHRR-(CMSK|CPHS|CCL|CHGT|DCOMP)-(FRAC|GHRR|HRPT)_V#R#_M0[13]_SYYYYMMDD.*

Examples:

  • AVHRR-CCL-HRPT_v1r0_m03_s20210802
  • AVHRR-CMSK-FRAC_v1r0_m03_s20210802
  • AVHRR-CPHS-GHRR_v1r0_m03_s20210802

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Datatype

The data types available for CLOUDS are:

  • AVHRR Cloud Cover/Layers (AVHRR_CCL)
  • AVHRR Cloud Mask (AVHRR_CLM)
  • AVHRR Cloud Phase (AVHRR_CLP)
  • AVHRR Cloud Top Height (AVHRR_CTH)
  • AVHRR Daytime Cloud Optical and Microphysical Properties (AVHRR_DCOM)

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End Orbit

Provide end orbit time time format.

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End Time

The end time format for the results.

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Inventory ID

The unique identifier assigned by CLASS for the data.

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Resolution

The following resolution are available:

Full Resolution Area Coverage (FRAC) 1km
Global High Resolution Radiometer (GHRR) 4km

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Satellite

EUMETSAT

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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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Start Orbit

Start time for the orbit  - format needed.

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Start Time

Time format needed for the beginning of the data.

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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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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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