Cloud Top Temperature and Height

 Table of contents

1.- Goal of CTTH product 
2.- CTTH algorithm summary description 
3.- List of inputs for CTTH 
4.- Coverage and resolution
5.- Description of CTTH outputs
6.- Example of CTTH visualisation

Access to "Algorithm Theroretical Basis Document for Cloud Products Processors of the NWC/GEO" for a more detailed description.

4.- Coverage and resolution

The CTTH software has been designed to allow the processing at satellite IR full spatial resolution of any rectangular areas defined by the user inside the MSG full disk (the processing of the MSG full disk is also possible). The validity of the CTTH product is commited inside the MSG full disk.

6.- Example of CTTH visualisation

It is important to note that the CTTH product is not just images, but numerical data. At first hand, the CTTH is rather thought to be used digitally (together with the appended quality flags) as input to mesoscale analysis models, objective Nowcasting schemes, but also in the extraction of other SAFNWC products.

Colour palettes are included in CTTH NetCdF files, thus allowing an easy visualisation of cloud top pressure (as illustrated on the SEVIRI example), height, temperature and effective cloudiness.

The product, if used as an image on the forecaster desk, may be visualized (together with CT) in an interactive visualisation system, where individual pixel values (top temperature, height and pressure, cloudiness) may be displayed while moving the mouse over the image.

Click on thumbnail for full-sized this image

SEVIRI CTTH cloud top pressure using the colour palette included in CTTH NetCdF files.