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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)
02 Apr 2026 16:59:00
Latency
7296
Level
1.13

Harmonics

Points count
6540853
First date
11 Mar 2011 05:00
Last date
25 Feb 2026 21:59

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 8.47951E-1 0E+0
1 0.12877 -3.93908E-5 -1.06451E-4
2 0.12886 -2.23485E-4 -2.32786E-4
3 0.12938 3.52463E-5 -2.82124E-4
4 0.14707 -2.02933E-4 1.13206E-4
5 0.16841 3.56918E-4 -1.74169E-4
6 0.16857 -7.08189E-4 -3.93768E-4
7 0.17036 5.7639E-4 -3.15645E-4
8 0.17052 -1.45055E-3 -3.36141E-4
9 0.17251 -9.72504E-5 7.89537E-4
10 0.17470 -2.74419E-4 -1.36504E-4
11 0.19989 1.05107E-3 3.97472E-4
12 0.20545 8.24862E-4 -3.46702E-4
13 0.24966 -6.03845E-4 7.94156E-4
14 0.25000 -5.06423E-4 -2.54673E-4
15 0.25395 6.10183E-4 1.89103E-3
16 0.25431 -3.17513E-5 -1.59787E-3
17 0.25631 1.33603E-5 -4.24614E-4
18 0.25667 -7.68963E-4 -1.30771E-4
19 0.25876 -3.55928E-3 2.77094E-4
20 0.26122 9.9951E-4 1.38426E-3
21 0.33303 -9.93571E-4 -2.43074E-3
22 0.34071 -2.41075E-3 4.66768E-4
23 0.34135 -8.0334E-4 6.88783E-4
24 0.34502 -2.88755E-3 -4.66947E-3
25 0.34943 4.78367E-4 -4.01012E-4
26 0.48977 -3.26373E-4 1.03164E-3
27 0.49109 6.10629E-4 1.87382E-3
28 0.49863 1.97688E-2 8.5704E-4
29 0.49932 1.5516E-4 -2.22437E-3
30 0.50000 -6.73701E-2 -2.81929E-2
31 0.50798 5.4904E-3 -2.14421E-4
32 0.50924 -1.88444E-3 -3.36025E-3
33 0.51606 1.49724E-3 2.14854E-3
34 0.51679 -1.81193E-3 -9.22765E-5
35 0.51753 -1.85826E-2 4.70533E-2
36 0.51826 2.88879E-4 6.47969E-4
37 0.52608 -1.87392E-3 -1.70888E-3
38 0.52743 -6.64739E-3 9.96627E-3
39 0.53632 -3.78682E-3 -2.64534E-4
40 0.53772 2.15843E-3 1.37206E-4
41 0.54697 -4.74591E-4 1.84862E-3
42 0.54843 2.06406E-4 3.95411E-4
43 0.89909 -1.25242E-4 2.99186E-4
44 0.92942 6.20189E-3 -6.5936E-3
45 0.93417 -7.97081E-4 1.34249E-3
46 0.96244 -9.08741E-3 7.31762E-3
47 0.96696 1.05151E-3 1.80939E-3
48 0.99185 1.26426E-3 -2.15015E-3
49 0.99455 -2.72107E-3 2.45429E-3
50 0.99727 1.62507E-1 1.43548E-1
51 1.00000 1.04017E-3 7.82771E-3
52 1.00275 4.63715E-2 5.74086E-2
53 1.00551 4.81829E-3 7.03579E-3
54 1.02954 1.41004E-3 3.91999E-4
55 1.03472 7.54419E-3 -5.83906E-3
56 1.04061 -1.69662E-3 -9.35421E-4
57 1.06951 3.70974E-3 -7.89411E-4
58 1.07581 8.88192E-2 -4.72526E-2
59 1.11346 2.6053E-3 -1.54253E-3
60 1.11951 -1.08415E-2 -1.52452E-2
61 1.16035 -3.11158E-5 -1.0787E-3
62 1.16693 -1.19039E-3 1.80695E-3
63 1.21136 2.05556E-4 2.55621E-4
64 13.66079 -3.70293E-3 -5.66248E-3
65 14.76529 -6.5664E-3 -2.16882E-3
66 27.55455 3.88231E-3 1.68774E-2
67 31.81193 2.88616E-4 -1.03223E-3
68 182.62118 -6.69831E-2 -1.14083E-2
69 365.25998 1.06529E-1 -1.68791E-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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