2 5 7 11 21 31 41 51
- --- -- ---- ---------- --------- --------- --------- ---------
|X| | |BRET|XXXXXXXXXX| | | | |
- --- -- ---- ---------- --------- --------- --------- ---------
| | | | | | |
| | | | | | |_(4)Modal Frequency (F10.0)
| | | | | |
| | | | | |_(3)Significant Wave Height (F10.0)
| | | | |
| | | | |_(2)Finish Frequency(F10.0)
| | | |
| | | |_(1)Start Frequency(F10.0)
| | |
| | |_Compulsory Data Record Keyword(A4)
| |
| |_Optional User Identifier(A2)
|
|_Compulsory END on last data record in data category (A3)
(1)-(2) Start/Finish Frequency - The lowest/highest frequency at which the spectrum is defined. The program will assume that the frequencies are in radians/sec unless a HRTZ data record has been used to change the units to Hertz (cycles/sec). If these fields are left blank, defaults will be assumed as follows:
| Start frequency is evaluated numerically so that approximately 0.25% of the spectral energy from zero frequency to this starting frequency is excluded. |
| Finish frequency is evaluated numerically so that approximately 99.5% of the spectral energy is included. |
(3)-(4) The significant wave height and modal frequency (in Rad/s unless a HRTZ data record has been used) are the parameters for the Bretschneider spectrum.
| The modal frequency must not be less than 0.01 rad/s. |
| A warning message will be issued if significant wave height is less than 1.0 mm. |