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Tide Gauge Details - USA - Pago_Pago_AS

Device description

Name
USA - Pago_Pago_AS
Country
USA
Group
TD UNESCO
Lat/Lon
-14.2766 / -170.690704

Last measured values

Time(UTC)
11 Dec 2025 01:09:00
Latency
2868401
Level
0.76

Harmonics

Points count
5368338
First date
29 Apr 2011 19:11
Last date
11 Dec 2025 01:09

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 5.29909E-1 0E+0
1 0.12877 1.90476E-4 -7.26087E-5
2 0.12886 -2.14753E-5 1.79932E-5
3 0.12938 -1.28412E-4 1.53836E-4
4 0.14707 -5.13714E-5 5.84917E-5
5 0.16841 -1.66145E-4 -1.04034E-4
6 0.16857 1.89189E-4 3.1441E-5
7 0.17036 -3.71079E-6 3.68575E-4
8 0.17052 -2.88471E-4 -9.41475E-4
9 0.17251 -1.2496E-3 -4.34381E-4
10 0.17470 1.32332E-4 1.19375E-4
11 0.19989 5.95424E-4 1.25319E-4
12 0.20545 -3.86637E-4 -2.92651E-5
13 0.24966 -5.68791E-5 7.06648E-4
14 0.25000 4.12866E-4 5.52811E-4
15 0.25395 -4.43573E-5 -2.27829E-4
16 0.25431 -8.61612E-4 3.22074E-4
17 0.25631 -1.65133E-4 1.46416E-4
18 0.25667 2.17924E-4 3.52688E-4
19 0.25876 2.02229E-3 -2.36036E-3
20 0.26122 -1.58328E-3 3.25766E-4
21 0.33303 1.75126E-3 1.53541E-3
22 0.34071 -1.63616E-4 1.07679E-4
23 0.34135 -2.19936E-4 -2.3451E-4
24 0.34502 -1.8993E-3 3.90513E-3
25 0.34943 5.30075E-4 5.45765E-4
26 0.48977 8.98859E-4 3.54068E-4
27 0.49109 -1.13873E-4 -8.3412E-4
28 0.49863 1.15519E-2 -9.91935E-3
29 0.49932 6.23115E-4 6.07695E-4
30 0.50000 -5.72563E-2 1.5096E-2
31 0.50798 4.26522E-3 3.76315E-3
32 0.50924 2.37192E-3 -1.86225E-4
33 0.51606 -1.89512E-3 -2.89313E-4
34 0.51679 1.30158E-3 3.28796E-3
35 0.51753 -2.14503E-1 3.0749E-1
36 0.51826 -3.32346E-4 -3.88855E-3
37 0.52608 -1.5208E-2 1.47525E-2
38 0.52743 9.78328E-2 4.07546E-2
39 0.53632 1.57726E-2 9.74647E-3
40 0.53772 2.17697E-3 -1.64576E-2
41 0.54697 2.19467E-3 -4.41763E-3
42 0.54843 -2.62358E-3 -3.36196E-4
43 0.89909 1.01384E-4 -1.16473E-4
44 0.92942 1.16865E-3 -5.85229E-4
45 0.93417 2.90092E-4 1.29673E-3
46 0.96244 -1.44528E-3 5.20248E-4
47 0.96696 2.98078E-4 3.62318E-4
48 0.99185 4.87088E-5 -2.23858E-5
49 0.99455 1.45781E-4 -6.24757E-5
50 0.99727 9.61952E-3 4.10108E-2
51 1.00000 1.48144E-3 2.67128E-3
52 1.00275 1.7356E-3 1.17871E-2
53 1.00551 -7.14922E-4 8.97438E-4
54 1.02954 4.90755E-4 8.74172E-4
55 1.03472 1.63439E-3 -1.10029E-3
56 1.04061 -2.70424E-4 -1.01833E-4
57 1.06951 -5.22919E-4 3.22516E-4
58 1.07581 2.65826E-2 9.34142E-3
59 1.11346 9.94998E-4 -3.8246E-5
60 1.11951 1.17717E-3 -5.04805E-3
61 1.16035 -2.79536E-5 -1.84809E-4
62 1.16693 -8.84471E-4 4.99711E-5
63 1.21136 7.64966E-4 7.04141E-4
64 13.66079 6.18041E-4 -8.48542E-3
65 14.76529 -2.83303E-4 5.47722E-3
66 27.55455 9.20322E-3 1.74015E-3
67 31.81193 -1.06366E-2 8.63096E-3
68 182.62118 -9.55137E-3 -1.59073E-2
69 365.25998 -1.03116E-2 1.2729E-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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