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NRT Notification Detail

Update to NRT monitoring software

DATE: 2025-12-16 13:47
TYPE: DATA

Description

Dear ROM SAF GTS User

The software for the NRT monitoring plots has been updated. This is a substantial update in the underlying software, moving from the Met Office's OPS system to software based on JEDI. Whilst every effort has been made to ensure that the transition is seamless, please be patient if there are teething troubles with the new system.

For the most part the plots should not change. However, there are a few science changes to note:
1. The previous system did not account for the drift in the tangent point of the occultations. The biggest difference as a consequence of this change is that the calculated bias of COSMIC-2 satellites in the sub-tropics is much reduced.
2. On the map scatter plots, the locations of the points now use the occultation's nominal location, rather than the lowest valid point within the profile.
3. A super-refraction check based on the model's vertical gradient of refractivity has been switched on.

If you notice any issues or errors, then please report these in the usual way.

Issued : 2025-12-16 13:24 UTC

Kind regards
The ROM SAF Team

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