Re: Cold anomaly in NE Portugal


David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

Are you converting the data into an imprecise data type (such as 8bit int)?
Depending on the scaling you apply it could be that the values in that
region (~350K) are too high for the data type and so 'roll over' into a
very low value. This happens to us occasionally when calculating
reflectance in the twilight region.

/random guess

Cheers,
Simon
=====================================

Simon,

Likely the guys are using the images from the MSG Data Manager software. The thermal scaling applied to the images avoids wrap-around artefacts such as you mention.

Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor@blueyonder.co.uk

Join MSG-1@groups.io to automatically receive all group messages.