Error in GOT4.10c with centre of mass option

Tides Q1 and K2 had erroneous coefficients for centre of mass Please resubmit your sites if you have used this combination of options.

Error in apmlitudes corrected

The error in our copies of GOT4.10c, Q1 and K2 amplitudes, is now corrected. For high-precision applications, the set of loading coefficients should be recomputed.

Novo sistema de noticias

O novo sistema de noticias esta totalmente funcional

Yes, all the data collected here is only for use within SEGAL, your data will never be communicated with any other external identity. The entire registration process is simple and serves only to have statistical records.

The ocean loading is calculated for the harmonics M2, S2, N2, K2, K1, O1, P1, Q1, Mf, Mm and Ssa using the program olfg. If the station is close to the coast, the post-processor olmpp is automatically run. This last program has been updated and has now a coastline resolution of about 0.6km. The coastline used is taken from the GMT package To force conservation of tidal water mass, a layer of water with a certain phase lag is subtracted from the models globally. Furthermore, the Green's functions are for a Gutenberg-Bullen Earth with a continental crust.

1) For displacement ocean tide loading the value is as good as your ocean tide model in the neighbourhood of your station. As a rule of thumb: Is your station near a shallow water sea , you are in trouble. Stations on islands in the open oceans should be okay. 2) For gravity: You are in trouble here because the direct gravitational attraction of the tidal water mass is more than likely dominating the loading. You will need a higher resolution coastline and should replace better ocean tide values in the model near the station. (Been there, done that, and it's a pain)

These 11 harmonics are the largest in amplitude and represent most of the total tidal signal. The other harmonics can be obtained by interpolation between these given values. Some ocean tide models provide the smaller harmonics and work is under way to include them on this ocean tide loading provider.