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Tide Gauge Details - France - Boucau-Bayonne

Device description

Name
France - Boucau-Bayonne
Country
France
Group
TD UNESCO
Lat/Lon
43.527302 / -1.51483

Last measured values

Time(UTC)
29 May 2025 04:59:00
Latency
5656
Level
4.13

Harmonics

Points count
5943492
First date
02 May 2011 22:15
Last date
29 May 2025 04:59

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 2.61726E+0 0E+0
1 0.12877 -1.67762E-4 4.39445E-4
2 0.12886 -1.83993E-3 5.15182E-4
3 0.12938 -2.65293E-3 -1.38944E-3
4 0.14707 -8.63058E-5 -8.86845E-4
5 0.16841 -1.57421E-4 3.18278E-4
6 0.16857 -8.323E-4 5.92156E-4
7 0.17036 9.72417E-4 -1.28277E-3
8 0.17052 3.16747E-5 4.42522E-3
9 0.17251 3.67297E-3 -2.86482E-3
10 0.17470 -5.29293E-4 1.07549E-3
11 0.19989 -1.16444E-4 -1.17642E-3
12 0.20545 -3.61749E-4 -6.8417E-4
13 0.24966 2.06533E-3 -6.95742E-4
14 0.25000 2.38397E-4 -4.87371E-3
15 0.25395 -2.88326E-5 1.00098E-3
16 0.25431 -5.34895E-3 -6.62015E-3
17 0.25631 -4.48052E-4 -9.00711E-5
18 0.25667 1.62524E-3 1.15923E-3
19 0.25876 -2.91068E-2 3.70564E-3
20 0.26122 8.55584E-3 1.4053E-2
21 0.33303 3.87725E-3 8.73256E-4
22 0.34071 -9.02593E-4 -1.16325E-3
23 0.34135 -3.47581E-4 1.50751E-3
24 0.34502 3.96765E-3 1.17808E-2
25 0.34943 8.81108E-4 -1.20689E-3
26 0.48977 2.80717E-3 4.02518E-3
27 0.49109 3.9645E-3 9.32601E-4
28 0.49863 5.35022E-2 -1.08869E-1
29 0.49932 3.49407E-3 -9.13371E-4
30 0.50000 -2.7707E-1 3.40062E-1
31 0.50798 2.4209E-2 -2.00017E-2
32 0.50924 -1.05467E-2 -1.48334E-3
33 0.51606 -5.27086E-3 -1.52391E-3
34 0.51679 -7.85523E-4 -1.39108E-3
35 0.51753 9.518E-1 8.14765E-1
36 0.51826 -7.55345E-3 1.09186E-3
37 0.52608 2.96996E-2 3.76117E-2
38 0.52743 1.2761E-1 -2.30842E-1
39 0.53632 2.55428E-2 -3.5857E-2
40 0.53772 -3.57855E-2 -9.40122E-3
41 0.54697 -6.90069E-3 -3.2767E-3
42 0.54843 7.05339E-5 4.48863E-3
43 0.89909 1.43933E-4 3.83631E-4
44 0.92942 8.42193E-4 2.91413E-4
45 0.93417 -9.24658E-4 -1.14127E-3
46 0.96244 -1.60009E-3 -9.20647E-4
47 0.96696 -1.10488E-4 1.54585E-3
48 0.99185 -4.50019E-4 -1.77925E-3
49 0.99455 1.72073E-3 5.696E-4
50 0.99727 2.17357E-2 5.32556E-2
51 1.00000 3.16996E-4 -4.61574E-3
52 1.00275 4.91335E-3 1.89209E-2
53 1.00551 2.1394E-3 5.75406E-4
54 1.02954 1.12871E-3 6.23228E-4
55 1.03472 1.70429E-3 -1.87047E-3
56 1.04061 8.33282E-6 6.97482E-4
57 1.06951 3.89733E-4 2.1524E-3
58 1.07581 2.99676E-3 -6.58716E-2
59 1.11346 -3.11987E-4 -4.92118E-3
60 1.11951 -1.75636E-2 1.16403E-2
61 1.16035 -2.3655E-3 3.11788E-3
62 1.16693 9.94796E-4 1.07291E-3
63 1.21136 1.07052E-3 -2.4756E-4
64 13.66079 -1.14367E-3 3.74956E-3
65 14.76529 -1.11578E-3 -4.11364E-3
66 27.55455 3.26251E-3 2.5738E-3
67 31.81193 8.31622E-3 -1.89211E-3
68 182.62118 3.88824E-4 -3.31059E-2
69 365.25998 4.8817E-2 -4.04188E-3
Mathematical Formula
Tide calculation mathematical formula
Visual Basic Syntax
Function EstimateTideValues() As [Function]
                        Dim Pi As [Double] = Math.PI
                        Dim sum As [Double] = harmonics(0, 1)
                        For k As Int16 = 1 To harmonics.GetUpperBound(0)
                        Dim period As [Double] = 2 * Pi / harmonics(k, 0)
                        Dim coefCos As [Double] = harmonics(k, 1)
                        Dim coefSin As [Double] = harmonics(k, 2) 
                        sum = sum + coefCos * Math.Cos(time * period)
                        sum = sum + coefSin * Math.Sin(time * period)
                        Next
                        Return sum
                        End Function
C# Syntax
double EstimateTideValues()
                        {
                        double Pi = Math.PI;
                        double sum = harmonics[0, 1];
                        for (int k=1; k <= harmonics.GetUpperBound(0); k++)
                        {
                        double period = 2 * Pi / harmonics[k, 0];
                        double coefCos = harmonics[k, 1];
                        double coefSin = harmonics[k, 2];
                        sum += coefCos * Math.Cos(time * period);
                        sum += coefSin * Math.Sin(time * period);
                        }
                        return sum;
                        }

Axis ranges

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