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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)
18 Jul 2026 00:56:00
Latency
450
Level
0.34

Harmonics

Points count
6731133
First date
11 Mar 2011 05:00
Last date
17 Jul 2026 23:02

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 8.48039E-1 0E+0
1 0.12877 -3.43177E-5 -1.00484E-4
2 0.12886 -2.13081E-4 -2.16765E-4
3 0.12938 2.83736E-5 -2.83865E-4
4 0.14707 -1.95094E-4 1.11711E-4
5 0.16841 3.40653E-4 -1.51076E-4
6 0.16857 -6.97472E-4 -4.05059E-4
7 0.17036 5.95749E-4 -2.85811E-4
8 0.17052 -1.48341E-3 -2.97052E-4
9 0.17251 -8.04331E-5 8.36806E-4
10 0.17470 -2.58313E-4 -1.27692E-4
11 0.19989 1.01945E-3 3.95883E-4
12 0.20545 8.24652E-4 -3.49471E-4
13 0.24966 -5.36323E-4 7.39997E-4
14 0.25000 -5.66087E-4 -2.86407E-4
15 0.25395 5.38165E-4 1.80904E-3
16 0.25431 -1.01955E-4 -1.61849E-3
17 0.25631 9.10138E-5 -4.19692E-4
18 0.25667 -6.52234E-4 -7.96356E-5
19 0.25876 -3.62532E-3 2.24786E-4
20 0.26122 9.4343E-4 1.31961E-3
21 0.33303 -1.00808E-3 -2.36904E-3
22 0.34071 -2.49755E-3 4.87927E-4
23 0.34135 -7.27254E-4 6.75743E-4
24 0.34502 -2.85542E-3 -4.70578E-3
25 0.34943 5.50216E-4 -3.58157E-4
26 0.48977 -3.01824E-4 1.03538E-3
27 0.49109 6.15498E-4 1.90604E-3
28 0.49863 1.99803E-2 6.86047E-4
29 0.49932 -3.5351E-5 -2.17269E-3
30 0.50000 -6.72007E-2 -2.82265E-2
31 0.50798 5.42165E-3 -1.41815E-4
32 0.50924 -1.93801E-3 -3.36709E-3
33 0.51606 1.50396E-3 2.0066E-3
34 0.51679 -1.91228E-3 2.14224E-7
35 0.51753 -1.85021E-2 4.70156E-2
36 0.51826 2.18156E-4 6.73746E-4
37 0.52608 -1.80093E-3 -1.69331E-3
38 0.52743 -6.61525E-3 9.88849E-3
39 0.53632 -3.77599E-3 -2.82605E-4
40 0.53772 2.13701E-3 1.22838E-4
41 0.54697 -4.63023E-4 1.82208E-3
42 0.54843 2.14888E-4 3.84199E-4
43 0.89909 -4.67617E-5 3.12593E-4
44 0.92942 6.19877E-3 -6.6967E-3
45 0.93417 -7.23284E-4 1.3815E-3
46 0.96244 -9.1904E-3 7.51752E-3
47 0.96696 1.11398E-3 1.79039E-3
48 0.99185 9.42742E-4 -2.43604E-3
49 0.99455 -3.06629E-3 3.29717E-3
50 0.99727 1.63574E-1 1.43516E-1
51 1.00000 6.73255E-4 7.13582E-3
52 1.00275 4.6161E-2 5.75724E-2
53 1.00551 4.65386E-3 7.1884E-3
54 1.02954 1.29515E-3 3.76424E-4
55 1.03472 7.43367E-3 -5.91041E-3
56 1.04061 -1.69451E-3 -9.09912E-4
57 1.06951 3.76619E-3 -1.11316E-3
58 1.07581 8.96094E-2 -4.72342E-2
59 1.11346 2.67234E-3 -1.53545E-3
60 1.11951 -1.0817E-2 -1.53563E-2
61 1.16035 -1.02892E-6 -1.08718E-3
62 1.16693 -1.29325E-3 1.90947E-3
63 1.21136 7.70714E-5 2.17206E-4
64 13.66079 -3.77818E-3 -5.91632E-3
65 14.76529 -6.51524E-3 -2.22132E-3
66 27.55455 3.83031E-3 1.61495E-2
67 31.81193 -3.42774E-5 -8.71937E-4
68 182.62118 -6.69732E-2 -1.19351E-2
69 365.25998 1.06249E-1 -1.66901E-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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