Skip Navigation Links weather.gov 
NOAA logo-Select to go to the NOAA homepage NDBC Title GraphicClick to go to NDBC home page   Select to go to the NWS homepage
Home News Organization
 
 
    
    Station List

 Observations
    Mobile Access
    Obs via Google Maps
    Classic Maps
         Recent
         Historical
         DART®
         Oil & Gas ADCP
    Obs Search
    Ship Obs Report
    Gliders
    BuoyCAMs Image indicating link to BuoyCAMs page
    APEX
    TAO
    DODS
    HF Radar
    OSMC
    Dial-A-Buoy
    RSS Feeds Image indicating link to RSS feed access page
    Obs Web Widget
    Email Access

 Station Status
    NDBC Maintenance
    NDBC Platforms
    Partner Platforms

 Program Info
    Facebook Logo
    NDBC on Facebook
    About NDBC
     Met/Ocean
          Moored Buoy
          C-MAN
    TAO
    DART®
    VOS
    CSP
    IOOS® Program
    IOOS® DAC

 Publications
    NDBC DQC Handbook
    Hurricane Data Plots
    Mariners Weather
      Log

    Observing
      Handbook No. 1


 Science Education

 NDBC Director
 FAQ
 Media Inquiries
 Contact Us
 Visitor Information
 Links
 
USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.

TAO performance continues to improve after fourth service cruise. Read more...

Description of NDBC wave spectra

The Wave Processing Module (WPM) Spectrum
Band Center Frequency of Band (Hz) Bandwidth (Hz)
1 0.0201 0.010
2 0.0325 0.005
3 0.0375 0.005
4 0.0425 0.005
5 0.0475 0.005
6 0.0525 0.005
7 0.0575 0.005
8 0.0625 0.005
9 0.0675 0.005
10 0.0725 0.005
11 0.0775 0.005
12 0.0825 0.005
13 0.0875 0.005
14 0.0925 0.005
15 0.1000 0.010
16 0.1100 0.010
17 0.1200 0.010
18 0.1300 0.010
19 0.1400 0.010
20 0.1500 0.010
21 0.1600 0.010
22 0.1700 0.010
23 0.1800 0.010
24 0.1900 0.010
25 0.2000 0.010
26 0.2100 0.010
27 0.2200 0.010
28 0.2300 0.010
29 0.2400 0.010
30 0.2500 0.010
31 0.2600 0.010
32 0.2700 0.010
33 0.2800 0.010
34 0.2900 0.010
35 0.3000 0.010
36 0.3100 0.010
37 0.3200 0.010
38 0.3300 0.010
39 0.3400 0.010
40 0.3500 0.010
41 0.3650 0.020
42 0.3850 0.020
43 0.4050 0.020
44 0.4250 0.020
45 0.4450 0.020
46 0.4650 0.020
47 0.4850 0.020

WPM spectrum is described in the WMO FM 65-XI WAVOB code as:

13/// 13254 15003 26/// 21005 21004 07/// 33655 32004

NDBC does not include the 0.02 Hz frequency in the FM 65 WAVEOB code. The FM 65 only contains 46 bands 2 through 47 listed in the table.

See: http://www.ndbc.noaa.gov/decode.shtml for information on the FM 65 WAVEOB code.


The (Directional) Wave Analyzer (DWA or WA) Spectra
WA Band DWA Band Center Frequency of Band (Hz) Bandwidth (Hz)
1 1 0.03 0.01
2 2 0.04 0.01
3 3 0.05 0.01
4 4 0.06 0.01
5 5 0.07 0.01
6 6 0.08 0.01
7 7 0.09 0.01
8 8 0.10 0.01
9 9 0.11 0.01
10 10 0.12 0.01
11 11 0.13 0.01
12 12 0.14 0.01
13 13 0.15 0.01
14 14 0.16 0.01
15 15 0.17 0.01
16 16 0.18 0.01
17 17 0.19 0.01
18 18 0.20 0.01
19 19 0.21 0.01
20 20 0.22 0.01
21 21 0.23 0.01
22 22 0.24 0.01
23 23 0.25 0.01
24 24 0.26 0.01
25 25 0.27 0.01
26 26 0.28 0.01
27 27 0.29 0.01
28 28 0.30 0.01
29 29 0.31 0.01
30 30 0.32 0.01
31 31 0.33 0.01
32 32 0.34 0.01
33 33 0.35 0.01
N/A 34 0.36 0.01
N/A 35 0.37 0.01
N/A 36 0.38 0.01
N/A 37 0.39 0.01
N/A 382 0.40 0.01

The (D)WA spectrum is described in the FM 65-XI WAVOB code as:

33/// 13004 11004

See: http://www.ndbc.noaa.gov/decode.shtml for information on the FM 65 WAVEOB code. The FM 65 WAVOB code only provides the first 33 frequency bands.


1 0.02 Hz is a noise band and not used in the calculations for WVHT, DPD, or APD.
2 For nondirectional spectrum. The directional spectrum stops at 0.35 Hz, Band 33.