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Woods Hole Coastal and Marine Science Center

South Carolina Coastal Erosion Study, Data Report for Observations, October 2003 - April 2004


Tidal Analysis

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Amplitude and phase of tidal constituents were computed using the tidal analysis program T_TIDE (Pawlowicz and others, 2002). The principal constituents are K1, O1, M2, N2, and S2. This report includes the full output from T_TIDE for each data record. D1 and D2 in the table below denote the computation of tidal constituents from deployment 1 and deployment 2 data records, respectively. C denotes the computation of tidal constituents from the combined records of data from both deployments.

Table headings for T_TIDE output:

  • tide: tidal constituent freq: frequency (cycles/hour)
  • major: major axis of tidal ellipse (for current observations) (cm/s)
  • emaj: error estimate for major axis (cm/s)
  • minor: minor axis of tidal ellipse (cm/s)
  • emin: error estimate for minor axis (cm/s)
  • inc: inclination of major axis (counter clockwise from east) (degrees)
  • einc: error estimate for inclination (degrees)
  • phase: phase of at time of major axis (degrees)
  • ephase: error estimate of phase (degrees)
  • snr: signal to noise ratio
Site Pressure
1 mab
Current Velocity
Surface 4 mbs 6 mbs Bottom
1 ** D2 ** D1 D2 C D1 D2 C D1 D2 C D1 D2 C
2 D1 D2 C D1 D2 C D1 D2 C D1 D2 C D1 D2 C
3 § D2 § D1 D2 C D1 D2 C D1 D2 C D1 D2 C
4 D1 D2 ŧ D1 D2 t D1 D2 t D1 D2 t D1 D2 t
5 *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
6 D1 D2 C D1 D2 C D1 D2 C D1 D2 C D1 D2 C
7 ŧ D2 ŧ D1 D2 C D1 D2 C D1 D2 C D1 D2 C
8 D1 D2 C D1 D2 C D1 D2 C D1 D2 C D1 D2 C

** No pressure data available during deployment 1 at site 1.

*** Data lost at site 5 due to significant tilt of the instrument.

§ Pressure signal too muted and skewed during deployment 1 at site 3 for harmonic analysis.

ŧ Pressure signal too distorted by biofouling during deployment 1 at site 7 for harmonic analysis.

t Data record too short during deployment 1 at site 4 for combined harmonic analysis.

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Return to Data Available. Go on to Timer Series Plots.

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This page last modified on Monday, 24-Nov-2014 12:04:46 EST