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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)
23 Sep 2026 09:56:00
Latency
33593
Level
0.62

Harmonics

Points count
6815379
First date
11 Mar 2011 05:00
Last date
23 Sep 2026 09:56

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 8.4534E-1 0E+0
1 0.12877 -2.59914E-5 -1.07645E-4
2 0.12886 -2.12408E-4 -2.14712E-4
3 0.12938 3.32482E-5 -2.74281E-4
4 0.14707 -1.93767E-4 1.21802E-4
5 0.16841 3.30656E-4 -8.63396E-5
6 0.16857 -6.44369E-4 -4.33743E-4
7 0.17036 6.2052E-4 -2.94889E-4
8 0.17052 -1.51194E-3 -3.37492E-4
9 0.17251 -1.15774E-4 8.44014E-4
10 0.17470 -2.64976E-4 -1.24821E-4
11 0.19989 9.81089E-4 2.32733E-4
12 0.20545 8.09429E-4 -3.25678E-4
13 0.24966 -4.62394E-4 5.0083E-4
14 0.25000 -7.73418E-4 -1.54799E-4
15 0.25395 4.60025E-4 1.77551E-3
16 0.25431 -1.46217E-4 -1.5565E-3
17 0.25631 1.14169E-4 -4.16716E-4
18 0.25667 -6.41728E-4 -1.0109E-4
19 0.25876 -3.54984E-3 2.24587E-4
20 0.26122 9.27561E-4 1.28566E-3
21 0.33303 -1.11833E-3 -2.35646E-3
22 0.34071 -2.40899E-3 4.53196E-4
23 0.34135 -7.65764E-4 6.02341E-4
24 0.34502 -2.83265E-3 -4.74127E-3
25 0.34943 5.19839E-4 -3.82857E-4
26 0.48977 -3.21806E-4 1.08595E-3
27 0.49109 6.20996E-4 1.86028E-3
28 0.49863 1.97569E-2 5.72234E-4
29 0.49932 1.1612E-4 -2.38297E-3
30 0.50000 -6.70449E-2 -2.79979E-2
31 0.50798 5.41234E-3 -3.29593E-5
32 0.50924 -2.0656E-3 -3.39465E-3
33 0.51606 1.45891E-3 2.12137E-3
34 0.51679 -1.98555E-3 -8.46059E-5
35 0.51753 -1.84035E-2 4.69992E-2
36 0.51826 1.87525E-4 7.66391E-4
37 0.52608 -1.87741E-3 -1.63182E-3
38 0.52743 -6.61117E-3 9.76535E-3
39 0.53632 -3.80441E-3 -3.09058E-4
40 0.53772 2.16618E-3 1.19339E-4
41 0.54697 -4.64354E-4 1.88546E-3
42 0.54843 1.69113E-4 4.04432E-4
43 0.89909 -5.70789E-5 2.2886E-4
44 0.92942 6.17431E-3 -6.77299E-3
45 0.93417 -7.46214E-4 1.40894E-3
46 0.96244 -9.33286E-3 7.37174E-3
47 0.96696 1.31841E-3 1.73867E-3
48 0.99185 9.14174E-4 -2.22841E-3
49 0.99455 -3.26309E-3 3.02623E-3
50 0.99727 1.63988E-1 1.43615E-1
51 1.00000 2.45242E-4 7.3996E-3
52 1.00275 4.61774E-2 5.70775E-2
53 1.00551 4.9824E-3 7.45276E-3
54 1.02954 1.35185E-3 5.65461E-4
55 1.03472 7.10674E-3 -5.83937E-3
56 1.04061 -1.4409E-3 -6.57531E-4
57 1.06951 3.70307E-3 -8.75783E-4
58 1.07581 8.9966E-2 -4.7147E-2
59 1.11346 2.8015E-3 -1.2991E-3
60 1.11951 -1.10234E-2 -1.52463E-2
61 1.16035 9.00905E-5 -1.12815E-3
62 1.16693 -1.26591E-3 2.04712E-3
63 1.21136 1.02114E-4 1.32752E-4
64 13.66079 -3.77911E-3 -6.04598E-3
65 14.76529 -6.37285E-3 -1.93739E-3
66 27.55455 4.3933E-3 1.69599E-2
67 31.81193 -4.77058E-4 -2.48469E-5
68 182.62118 -6.46388E-2 -1.58246E-2
69 365.25998 1.09092E-1 -1.22984E-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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