Meteorological Bulletin M3.1

Starting line

The starting line is omitted for products in GRIB code. ECMWF procedures conform to those specified in the WMO Manual on the GTS. The format is

<SOH> <CR> <CR> <LF> nnn

where

nnn is a transmission sequence number, following WMO rules. Numbers '000' to '999' are used in a cyclic manner, starting with 000 for the first message containing data from the current day's operations.