GUIDE WAVE ANALYSIS AND FORECASTING - WMO

124
Section
number
Symbolic figure group Contents
2 2222 Maximum non-directional spectral density from heave sensor, and ratios
of individual spectral densities to the maximum value
3 3333 Maximum non-directional spectral density from slope sensor, and ratios
of individual spectral densities to the maximum value
4 4444 Directional wave functions. Mean and principle wave directions and first
and second normalized polar Fourier coefficients, for bands described
in Section 1
5 5555 Directional or non-directional spectral estimates by frequency or wave
number, as indicated, and direction with directional spread
REGULATIONS:
65.1 General
65.1.1 The code name WAVEOB shall not be included in the report.
D . . . . D
65.1.2 Use of groups or IIiii*
M iM iM jM j A 1b wn bn bn b ** YYMMJ GGgg/ or
or Q cL aL aL aL a L oL oL oL oL o**
I 1I 2I 2//
NOTE: See Regulation 18.2.3, Notes (1), (2) and (3)***.
65.1.2.1 Each individual WAVEOB report, whether or not included in a bulletin of such reports, shall
contain as the first group the identification group M iM iM jM j.
65.1.2.2 A sea station shall be indicated by either the group D . . . . D or A 1b wn bn bn b. The position of a
sea station shall be indicated by the groups Q cL aL aL aL a L oL oL oL oL o. A satellite shall be
indicated by the group I 1I 2I 2// and an aircraft shall report ///// for I 1I 2I 2//. A fixed sea
station (other than an ocean weather station and a moored buoy), which is considered by the
Member operating it to be in the same category as a land station, shall report its identification
and position by means of the group IIiii.
NOTE: Data may be transmitted from a sea station or from a remote platform (aircraft or satellite).
65.1.2.3 In a report from a sea station (including an ocean weather station and a moored buoy), the
latitude and longitude shall be encoded with the actual location of the station. In a satellite or
aircraft report, the latitude and longitude shall indicate the (approximate) centre of the area
observed.
65.1.3 Use of Sections 0 and 1
GUIDE TO WAVE ANALYSIS AND FORECASTING
65.1.3.1 The first three data groups in Section 0, after the location, shall contain indicators showing if
data are expressed as frequency or wave number, the method of calculation of data and type
of platform, data on the water depth in metres, significant wave height in centimetres (or tenths
of a metre) and spectral peak period in tenths of a second or spectral peak wave length in
metres. Optional groups, when included, shall contain data on the maximum wave height,
average wave period or average wave length, estimate of significant wave height from slope
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* Included in a fixed sea station report only.
** Included in a sea station or remote platform report only.
*** Notes to Regulation 18.2.3:
(1) A 1 b w normally corresponds to the maritime zone in which the buoy was deployed. The WMO Secretariat allocates to
Members, who request and indicate the maritime zone(s) of interest, a block or blocks of serial numbers (n b n b n b ) to be
used by their environmental buoy stations.
(2) The Member concerned registers with the WMO Secretariat the serial numbers actually assigned to individual stations
together with their geographical positions of deployment.
(3) The Secretariat informs all concerned of the allocation of serial numbers and registrations made by individual Members.