2 5 7 11 21 31 41 51 61
- --- -- ---- ---------- -------- -------- -------- -------- --------
|X| | |TMAS|XXXXXXXXXX| | | | | |
- --- -- ---- ---------- -------- -------- -------- -------- --------
| | | | | | | |
| | | | | | | |_(5)Peak Frequency
| | | | | | |
| | | | | | |_(4)Alpha(F10.0)
| | | | | |
| | | | | |_(3)Gamma(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 assumes that all 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 = Peak frequency * (0.58+(γ-1.0)*0.05/19.0). |
| Finish frequency is evaluated numerically so that approximately 99% of the spectral energy is included. |
(3)-(5) Gamma, Alpha and Peak Frequency.
Note: Even if Hz is used to define the frequencies, Alpha has units of rad4.
The water depth used in this spectrum is defined by the DPTH data record in Data Category 5.