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Tide Gauge Details - Solomon Islands - Honiara

Device description

Name
Solomon Islands - Honiara
Country
Solomon Islands
Group
TD UNESCO
Lat/Lon
-9.4289 / 159.955505

Last measured values

Time(UTC)
09 May 2025 18:59:00
Latency
2771
Level
1.04

Harmonics

Points count
6142091
First date
11 Mar 2011 05:00
Last date
09 May 2025 18:59

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 8.51488E-1 0E+0
1 0.12877 -3.05661E-5 -1.25273E-4
2 0.12886 -2.40307E-4 -2.72054E-4
3 0.12938 2.12231E-5 -2.71166E-4
4 0.14707 -1.77426E-4 6.86687E-5
5 0.16841 3.98242E-4 -2.21205E-4
6 0.16857 -7.12177E-4 -4.21404E-4
7 0.17036 6.91392E-4 -2.30288E-4
8 0.17052 -1.60416E-3 -4.15264E-4
9 0.17251 2.08289E-5 7.97873E-4
10 0.17470 -2.58296E-4 -4.17274E-5
11 0.19989 1.05385E-3 3.88045E-4
12 0.20545 8.55381E-4 -2.84397E-4
13 0.24966 -6.566E-4 8.51982E-4
14 0.25000 -4.88597E-4 -1.30674E-4
15 0.25395 3.87124E-4 1.89941E-3
16 0.25431 2.07474E-4 -1.40197E-3
17 0.25631 -2.80214E-6 -5.26354E-4
18 0.25667 -7.39227E-4 -1.60825E-4
19 0.25876 -3.53312E-3 1.16823E-4
20 0.26122 9.18171E-4 1.32243E-3
21 0.33303 -1.01558E-3 -2.51573E-3
22 0.34071 -2.20755E-3 4.98688E-4
23 0.34135 -9.04083E-4 4.74003E-4
24 0.34502 -2.83441E-3 -4.58101E-3
25 0.34943 3.45924E-4 -4.87347E-4
26 0.48977 -3.15749E-4 1.3043E-3
27 0.49109 6.67729E-4 1.54442E-3
28 0.49863 1.90361E-2 1.39774E-3
29 0.49932 2.14729E-5 -2.38246E-3
30 0.50000 -6.73275E-2 -2.82515E-2
31 0.50798 5.83177E-3 -2.30922E-4
32 0.50924 -1.69975E-3 -3.50773E-3
33 0.51606 1.2794E-3 2.00511E-3
34 0.51679 -1.63837E-3 -5.45394E-4
35 0.51753 -1.82458E-2 4.71453E-2
36 0.51826 3.23397E-4 7.99839E-4
37 0.52608 -1.92088E-3 -1.58566E-3
38 0.52743 -6.59697E-3 1.04128E-2
39 0.53632 -4.07356E-3 -2.44511E-4
40 0.53772 2.1232E-3 3.84017E-4
41 0.54697 -6.54683E-4 1.70852E-3
42 0.54843 -9.59871E-6 3.85174E-4
43 0.89909 -6.0459E-4 2.36147E-4
44 0.92942 5.70233E-3 -6.33741E-3
45 0.93417 -5.06326E-4 1.5307E-3
46 0.96244 -8.96356E-3 7.49374E-3
47 0.96696 1.01467E-3 2.31056E-3
48 0.99185 1.09395E-3 -2.26271E-3
49 0.99455 -3.17829E-3 3.43102E-3
50 0.99727 1.59714E-1 1.43745E-1
51 1.00000 5.5414E-4 7.21656E-3
52 1.00275 4.63868E-2 5.74721E-2
53 1.00551 5.18462E-3 7.92318E-3
54 1.02954 1.12794E-3 4.33974E-5
55 1.03472 7.10527E-3 -6.00725E-3
56 1.04061 -1.39291E-3 -9.40726E-4
57 1.06951 3.50064E-3 -1.43631E-3
58 1.07581 8.72576E-2 -4.67808E-2
59 1.11346 2.25583E-3 -1.48751E-3
60 1.11951 -1.10505E-2 -1.46676E-2
61 1.16035 -3.40402E-4 -1.05937E-3
62 1.16693 -1.5147E-3 1.86066E-3
63 1.21136 3.56827E-5 8.31137E-6
64 13.66079 -3.65838E-3 -5.7938E-3
65 14.76529 -7.00735E-3 -2.10312E-3
66 27.55455 3.93837E-3 1.75481E-2
67 31.81193 6.82534E-5 -7.89159E-4
68 182.62118 -6.94567E-2 -1.09569E-2
69 365.25998 1.10704E-1 -2.30019E-2
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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