World sea levels

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 09:02:00
Latency
2860
Level
0.65

Harmonics

Points count
6731723
First date
11 Mar 2011 05:00
Last date
18 Jul 2026 09:02

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 8.48034E-1 0E+0
1 0.12877 -3.35659E-5 -1.00678E-4
2 0.12886 -2.12602E-4 -2.17388E-4
3 0.12938 2.89884E-5 -2.84287E-4
4 0.14707 -1.93879E-4 1.11562E-4
5 0.16841 3.41898E-4 -1.49419E-4
6 0.16857 -6.95433E-4 -4.04531E-4
7 0.17036 5.95701E-4 -2.87889E-4
8 0.17052 -1.4846E-3 -2.98771E-4
9 0.17251 -8.04336E-5 8.38872E-4
10 0.17470 -2.59535E-4 -1.26064E-4
11 0.19989 1.01833E-3 3.9439E-4
12 0.20545 8.25654E-4 -3.5121E-4
13 0.24966 -5.33297E-4 7.36895E-4
14 0.25000 -5.65193E-4 -2.90649E-4
15 0.25395 5.33747E-4 1.80981E-3
16 0.25431 -1.05273E-4 -1.61541E-3
17 0.25631 9.53938E-5 -4.18558E-4
18 0.25667 -6.48061E-4 -8.15158E-5
19 0.25876 -3.62069E-3 2.24234E-4
20 0.26122 9.38813E-4 1.3187E-3
21 0.33303 -1.00499E-3 -2.36507E-3
22 0.34071 -2.4976E-3 4.83105E-4
23 0.34135 -7.30129E-4 6.71898E-4
24 0.34502 -2.85065E-3 -4.70556E-3
25 0.34943 5.49926E-4 -3.53561E-4
26 0.48977 -3.00783E-4 1.03682E-3
27 0.49109 6.17104E-4 1.90667E-3
28 0.49863 1.99801E-2 6.84414E-4
29 0.49932 -3.46191E-5 -2.17115E-3
30 0.50000 -6.72018E-2 -2.82277E-2
31 0.50798 5.42121E-3 -1.43632E-4
32 0.50924 -1.93771E-3 -3.36522E-3
33 0.51606 1.50269E-3 2.00786E-3
34 0.51679 -1.91147E-3 -1.40171E-6
35 0.51753 -1.85025E-2 4.70174E-2
36 0.51826 2.17919E-4 6.71903E-4
37 0.52608 -1.80208E-3 -1.69156E-3
38 0.52743 -6.61387E-3 9.88689E-3
39 0.53632 -3.77408E-3 -2.83672E-4
40 0.53772 2.13486E-3 1.23771E-4
41 0.54697 -4.65407E-4 1.82217E-3
42 0.54843 2.17385E-4 3.8436E-4
43 0.89909 -4.20433E-5 3.18062E-4
44 0.92942 6.19617E-3 -6.70352E-3
45 0.93417 -7.29602E-4 1.37726E-3
46 0.96244 -9.19506E-3 7.51128E-3
47 0.96696 1.11859E-3 1.79693E-3
48 0.99185 9.39832E-4 -2.42884E-3
49 0.99455 -3.06641E-3 3.28982E-3
50 0.99727 1.63575E-1 1.43523E-1
51 1.00000 6.6914E-4 7.12959E-3
52 1.00275 4.61669E-2 5.75769E-2
53 1.00551 4.64656E-3 7.18568E-3
54 1.02954 1.29499E-3 3.84648E-4
55 1.03472 7.43429E-3 -5.91876E-3
56 1.04061 -1.69877E-3 -9.17034E-4
57 1.06951 3.76923E-3 -1.12082E-3
58 1.07581 8.96075E-2 -4.72423E-2
59 1.11346 2.673E-3 -1.54418E-3
60 1.11951 -1.08182E-2 -1.53477E-2
61 1.16035 -4.80627E-6 -1.07928E-3
62 1.16693 -1.28884E-3 1.90161E-3
63 1.21136 8.36728E-5 2.10994E-4
64 13.66079 -3.76678E-3 -5.91673E-3
65 14.76529 -6.5061E-3 -2.22846E-3
66 27.55455 3.84138E-3 1.61455E-2
67 31.81193 -4.54728E-5 -8.68352E-4
68 182.62118 -6.6982E-2 -1.19419E-2
69 365.25998 1.0626E-1 -1.66871E-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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