Updates and reprocessing
![](/fileadmin/_processed_/4/f/csm_reference_period_MSLA_UPD_1993_2012_7d85478b1f.png)
Aviso have been distributing altimetry data worldwide since 1992. Since that date, satellite altimetry has evolved: new missions, upgrades, reprocessing, new standards, new processing methods, etc, allowing significant impact on the product quality.
For each upgrade or change for a given product, Aviso communicate with users by these dedicated pages (or by email if you’ve registered to this product on the registration form)