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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)
04 Feb 2026 23:59:00
Latency
2569
Level
0.97

Harmonics

Points count
6511397
First date
11 Mar 2011 05:00
Last date
04 Feb 2026 23:59

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 8.48183E-1 0E+0
1 0.12877 -3.20406E-5 -1.08897E-4
2 0.12886 -2.27742E-4 -2.39249E-4
3 0.12938 3.41779E-5 -2.80252E-4
4 0.14707 -2.03167E-4 1.16695E-4
5 0.16841 3.61768E-4 -1.51792E-4
6 0.16857 -6.87016E-4 -4.0463E-4
7 0.17036 5.83882E-4 -3.4534E-4
8 0.17052 -1.4796E-3 -3.38991E-4
9 0.17251 -8.58935E-5 7.93395E-4
10 0.17470 -2.78077E-4 -1.36656E-4
11 0.19989 1.05419E-3 3.90641E-4
12 0.20545 8.24574E-4 -3.49683E-4
13 0.24966 -5.92792E-4 7.76411E-4
14 0.25000 -5.24146E-4 -2.57501E-4
15 0.25395 5.67115E-4 1.94734E-3
16 0.25431 2.49948E-5 -1.56732E-3
17 0.25631 2.68415E-5 -3.82064E-4
18 0.25667 -7.30932E-4 -1.61917E-4
19 0.25876 -3.58375E-3 2.47687E-4
20 0.26122 9.84939E-4 1.40505E-3
21 0.33303 -1.02361E-3 -2.43691E-3
22 0.34071 -2.36554E-3 4.79295E-4
23 0.34135 -7.92963E-4 6.46777E-4
24 0.34502 -2.90438E-3 -4.67015E-3
25 0.34943 4.37443E-4 -3.81185E-4
26 0.48977 -3.27339E-4 1.05501E-3
27 0.49109 6.49703E-4 1.87737E-3
28 0.49863 1.96901E-2 9.04251E-4
29 0.49932 1.4138E-4 -2.13325E-3
30 0.50000 -6.73224E-2 -2.81185E-2
31 0.50798 5.50471E-3 -2.127E-4
32 0.50924 -1.88463E-3 -3.35706E-3
33 0.51606 1.51679E-3 2.13935E-3
34 0.51679 -1.80458E-3 -1.11432E-4
35 0.51753 -1.85883E-2 4.70334E-2
36 0.51826 2.75274E-4 6.38877E-4
37 0.52608 -1.85345E-3 -1.73012E-3
38 0.52743 -6.6257E-3 9.98984E-3
39 0.53632 -3.76915E-3 -2.70398E-4
40 0.53772 2.16525E-3 1.49476E-4
41 0.54697 -4.73465E-4 1.83735E-3
42 0.54843 2.18024E-4 3.95036E-4
43 0.89909 -1.36417E-4 2.56433E-4
44 0.92942 6.20201E-3 -6.50776E-3
45 0.93417 -7.01947E-4 1.33756E-3
46 0.96244 -9.11345E-3 7.32974E-3
47 0.96696 1.00633E-3 1.75029E-3
48 0.99185 1.23009E-3 -2.42612E-3
49 0.99455 -2.96153E-3 2.29504E-3
50 0.99727 1.62218E-1 1.43608E-1
51 1.00000 8.78299E-4 8.06877E-3
52 1.00275 4.64474E-2 5.76908E-2
53 1.00551 5.0591E-3 7.17443E-3
54 1.02954 1.33782E-3 4.73496E-4
55 1.03472 7.52022E-3 -5.90021E-3
56 1.04061 -1.74314E-3 -9.60071E-4
57 1.06951 3.79941E-3 -9.43739E-4
58 1.07581 8.86602E-2 -4.73218E-2
59 1.11346 2.6223E-3 -1.48586E-3
60 1.11951 -1.08894E-2 -1.52049E-2
61 1.16035 7.22899E-6 -1.05085E-3
62 1.16693 -1.20612E-3 1.83465E-3
63 1.21136 1.93802E-4 2.27901E-4
64 13.66079 -3.66796E-3 -5.83211E-3
65 14.76529 -6.74175E-3 -2.18999E-3
66 27.55455 3.97074E-3 1.68577E-2
67 31.81193 3.47329E-4 -8.80097E-4
68 182.62118 -6.70201E-2 -1.09686E-2
69 365.25998 1.06848E-1 -1.6556E-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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