Information about the data

Here are some information about the data provided by ECMWF.

Twice a day, ECMWF disseminates its product. At 00UT, they provide seven files which are 38400 bytes long. Those files cover a period of 36 hour with a step of six hour. There are files for T, T+6, T+12, T+18, T+24, T+30 and T+36.
From those files are produced the short term predictions.

At 12UT, ECMWF send twenty files of 38400 bytes. Those files cover a period of 192 hour with a step of 6 hour up to T+36, and twelve hour after. Then the twenty files are for the times T, T+6, T+12, T+18, T+24, T+30, T+36, T+48, T+60, T+72, T+84, T+96, T+108, T+120, T+132, T+144, T+156, T+168, T+180, T+192.
From the files up to T+36 are produced another set of short term predictions, and with the T, T+12, T+24, T+36, T+48 ... (every twelve hour files), are produced the long term predictions.

The data cover a 3x3 degree grid for the 45x35 degree area A1 = [65W to 110W]x[10S to 43S], and a .5x.5 degree grid for a 5x5 degree area around each observatory :

area A2 = [67W to 71.5W]x[22S to 26.5S],

area A3 = [67W to 71.5W]x[27S to 31.5S].