2 5 7 11 21 31 41 51 61
- --- -- ---- ---------- --------- --------- --------- --------- ---------
|X|XXX| |OHBS|XXXXXXXXXX| | | | | |
- --- -- ---- ---------- --------- --------- --------- --------- ---------
| | | | | | |
| | | | | | |_(5)Modal Frequency #1 (F10.0)
| | | | | |
| | | | | |_(4)Shape Parameter #1 (F10.0)
| | | | |
| | | | |_(3)Significant Wave Height #1 (F10.0)
| | | |
| | | |_(2)Finish Frequency(F10.0)
| | |
| | |_(1)Start Frequency(F10.0)
| |
| |_Compulsory Data Record Keyword(A4)
|
|_Optional User Identifier(A2)
(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)-(5) The significant wave height, shape parameter and modal frequency (in Rad/s unless a HRTZ data record has been used) are the parameters for the first Ochi-Hubble sub-spectrum.
| The shape parameter must not be less than 0.001. |
| Modal frequency must not be less than 0.01 rad/s. |
| A warning message will be issued if the total significant wave height of the spectrum is less than 1.0 mm. |
Continuation Data Record for defining the parameters of the second Ochi-Hubble sub-spectrum:
2 5 11 21 31 41 51 61
- --- -- ---- ---------- --------- --------- --------- --------- ---------
|X| | |CONT|XXXXXXXXXX|XXXXXXXXX|XXXXXXXXX| | | |
- --- -- ---- ---------- --------- --------- --------- --------- ---------
| | | | | |
| | | | | |_(8) Modal Frequency #2 (F10.0)
| | | | |
| | | | |_(7)Shape Parameter #2 (F10.0)
| | | |
| | | |_(6)Significant Wave Height #2 (F10.0)
| | |
| | |_Indicates Continuation of above Data Record(A4)
| |
| |_Optional User Identifier(A2)
|
|_Compulsory END on last data record in data category (A3)
(6)-(8) The significant wave height, shape parameter and modal frequency (in Rad/s unless a HRTZ data record has been used) are the parameters for the second Ochi-Hubble sub-spectrum.
| The shape parameter must not be less than 0.001. |
| Modal frequency must not be less than 0.01 rad/s. |
| A warning message will be issued if the total significant wave height of the spectrum is less than 1.0 mm. |
The total significant wave height of Ochi-Hubble spectrum is defined by Equation 2–45 in the Aqwa Theory Manual.
Cross-swell spectrum cannot be defined with an Ochi-Hubble spectrum.
Spreading sea cannot be defined by The SPDN Data Record - Wave Spectral Direction with an Ochi-Hubble spectrum.