Sea-Bird Zero-Crossing Statistics File Format


The Sea-Bird zero-crossing processing steps are:


The zero-crossing statistic files are in the Sea-Bird format that contain 3 lines of data per record. The first line contains (starting with a '*'):

Item #

Description

1

Burst number

2

Start of wave burst, seconds since 1 Jan 1989 (+ 3 days)*

3

Wave integration time

4

Number of points in wave burst

5

Number of spectral estimates in each frequency band

6

Water depth (m)

7

Pressure sensor depth (m)

8

Density (kg/m3 )


The second line contains:

Item #

Description

1

Total variance of time series (m2 )

2

Total energy (Joules/m2 )

3

Average wave height (m)

4

Average wave period (s)


The third line contains:

Item #

Description

1

Maximum wave height (m)

2

Significant wave height, H1/3 (m) (largest third)

3

Significant period (s) (from largest third)

4

H1/10 (m) (from largest 10%)

5

H1/100 (m) (from largest 1%)


If there are less than 10 waves H1/10 is set to 0.

If there are less than 100 waves H1/100 is set to 0.