1. COASTAL DATA INFORMATION PROGRAM 1975 - present
Julie Thomas
Scripps Institution of Oceanography
La Jolla, CA
February 26, 2008

2. CDIP XML METADATA – Runs on the fly from a MYSQL database

3. WAVE CONTENT – NOAA PROGRAM OFFICE – DIF
Directional Waverider Buoy
X,Y,Z Time Series
Of Sea Surface
“First 5” Parameters describing the 2D wave spectrum (a0,a1,b1,a2,b2)
Z Time Series
Frequency Spectrum, a0(f)
(wave energy as a function of wave frequency)
X,Y,Z Time Series
First (a1,b1) and Second (a2,b2)
Moments of the Directional Spectrum,
expressed as infinite Fourier Series
S(f,θ)=
a0(f)·[a1·cos(θ)+b1·sin(θ) +a2·cos(2θ) +b2·sin(2θ)
+a3·cos(3θ)+b3·sin(3θ)+a4·cos(4θ)+b4·sin(4θ)
+………………infinity and beyond]

4. WAVE CONTENT
The Big 3: X, Y, Z  Time Series Analysis  The First 5: a0(f),a1(f),b1(f),a2(f),b2(f) a0
Sample CDIP Spectral Data File

6. Coastal Data Information Program (CDIP)
full wave spectral file sent to NDBC in XML format.
Sample section
from XML file.
Integration with GTS/AWIPS allows
dissemination to NWS offices.

7. NWS Eureka Forecast Wave Partitioning Model Allows for Depiction
of varying swell directions.
CDIP Spectral file is parsed, used as a driver for the wave model, and
provides better interface with wave partitioning.

8. Now observations and models are talking
the same language (i.e. based on spectral file
input).
Models
Observations