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Tide Gauge Details - Vanuatu - Vanuatu

Device description

Name
Vanuatu - Vanuatu
Country
Vanuatu
Group
TD UNESCO
Lat/Lon
-17.755301 / 168.307693

Last measured values

Time(UTC)
03 May 2026 23:56:00
Latency
2594327
Level
0.64

Harmonics

Points count
6770134
First date
29 Apr 2011 19:10
Last date
24 Feb 2026 13:59

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 8.89775E-1 0E+0
1 0.12877 -3.30145E-4 -3.09081E-4
2 0.12886 -4.74927E-4 -4.49664E-4
3 0.12938 2.8708E-4 -4.68477E-5
4 0.14707 1.26922E-4 1.00594E-4
5 0.16841 4.10306E-4 1.37352E-4
6 0.16857 8.95805E-4 -4.17545E-4
7 0.17036 1.72449E-4 2.08819E-4
8 0.17052 -5.45108E-4 -5.14231E-4
9 0.17251 2.84237E-4 3.29663E-4
10 0.17470 4.2752E-5 6.89928E-4
11 0.19989 4.14557E-4 -1.30531E-3
12 0.20545 -5.99299E-4 -4.5007E-4
13 0.24966 -7.69959E-4 -1.54242E-4
14 0.25000 -9.30935E-4 -1.90978E-4
15 0.25395 8.28536E-4 3.57182E-4
16 0.25431 -1.14472E-3 -6.00352E-4
17 0.25631 -1.38486E-4 -2.18556E-4
18 0.25667 6.97336E-4 -2.61869E-5
19 0.25876 1.41311E-6 2.36385E-4
20 0.26122 5.50007E-4 -9.87401E-4
21 0.33303 -1.85364E-3 -4.481E-4
22 0.34071 -1.29243E-3 -3.15545E-4
23 0.34135 4.46215E-5 5.68946E-4
24 0.34502 -1.42511E-3 -4.5565E-3
25 0.34943 -8.13458E-4 4.86861E-4
26 0.48977 -1.11774E-3 2.33979E-3
27 0.49109 -2.14043E-3 5.64502E-4
28 0.49863 2.90232E-2 7.00221E-3
29 0.49932 1.35796E-5 -3.25033E-3
30 0.50000 -8.32329E-2 -6.00529E-2
31 0.50798 3.42628E-3 8.23258E-3
32 0.50924 1.77937E-3 -1.64587E-3
33 0.51606 -2.10682E-3 -5.72032E-3
34 0.51679 -5.21168E-3 1.66533E-3
35 0.51753 -2.97553E-1 1.61354E-1
36 0.51826 -8.72276E-3 7.96635E-3
37 0.52608 -1.47437E-2 3.64944E-3
38 0.52743 4.30651E-2 5.84738E-2
39 0.53632 4.07044E-3 6.51938E-3
40 0.53772 7.30689E-3 -6.39237E-3
41 0.54697 1.65949E-3 -1.6768E-4
42 0.54843 -2.73204E-4 -6.52086E-4
43 0.89909 -6.45431E-4 1.95268E-4
44 0.92942 3.64744E-3 -2.13742E-3
45 0.93417 -1.72737E-3 7.98489E-4
46 0.96244 -5.9064E-3 5.97804E-3
47 0.96696 1.72982E-3 -5.4055E-5
48 0.99185 -7.07683E-4 -4.77481E-5
49 0.99455 2.01616E-3 1.94533E-3
50 0.99727 1.19241E-1 8.70342E-2
51 1.00000 3.43347E-3 1.25798E-3
52 1.00275 3.01331E-2 2.84558E-2
53 1.00551 1.55671E-3 2.43508E-3
54 1.02954 -9.45652E-4 -1.59696E-3
55 1.03472 5.43694E-3 -4.57469E-3
56 1.04061 -1.66179E-3 4.0294E-3
57 1.06951 -3.16111E-4 2.55951E-3
58 1.07581 6.48517E-2 -3.65298E-2
59 1.11346 2.62216E-3 1.85318E-3
60 1.11951 -1.04208E-2 -8.90735E-3
61 1.16035 -2.41237E-3 -1.84328E-4
62 1.16693 2.19137E-3 -1.01235E-5
63 1.21136 1.46097E-3 2.60471E-4
64 13.66079 2.00328E-3 -8.0066E-3
65 14.76529 -4.06311E-3 9.71827E-3
66 27.55455 -6.25458E-3 1.26096E-2
67 31.81193 9.88708E-3 8.56388E-3
68 182.62118 2.27E-2 2.32251E-3
69 365.25998 8.19057E-2 -8.35925E-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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