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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)
23 Apr 2024 22:57:00
Latency
708
Level
0.09

Harmonics

Points count
4532576
First date
29 Apr 2011 19:11
Last date
23 Apr 2024 20:21

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 5.37962E-1 0E+0
1 0.12877 2.41121E-4 -7.65669E-5
2 0.12886 -4.55705E-5 1.66944E-5
3 0.12938 -2.02405E-4 2.24852E-4
4 0.14707 -5.12729E-5 1.11672E-4
5 0.16841 -1.94906E-4 -6.62169E-5
6 0.16857 1.82928E-4 -8.16181E-7
7 0.17036 -1.84541E-5 3.66837E-4
8 0.17052 -3.73194E-4 -1.01891E-3
9 0.17251 -1.43079E-3 -4.93211E-4
10 0.17470 1.80431E-4 2.18169E-4
11 0.19989 5.87415E-4 7.38926E-5
12 0.20545 -3.92953E-4 -9.81772E-6
13 0.24966 -8.51177E-5 7.67152E-4
14 0.25000 3.87768E-4 5.27255E-4
15 0.25395 -1.14934E-4 -2.10161E-4
16 0.25431 -7.6898E-4 2.332E-4
17 0.25631 -2.04845E-4 1.54617E-4
18 0.25667 2.76234E-4 3.6295E-4
19 0.25876 1.95607E-3 -2.69254E-3
20 0.26122 -1.81777E-3 3.3143E-4
21 0.33303 1.65332E-3 1.56454E-3
22 0.34071 -1.40835E-4 1.24217E-4
23 0.34135 -2.44285E-4 -7.48844E-5
24 0.34502 -1.93611E-3 3.88698E-3
25 0.34943 4.77825E-4 7.95521E-4
26 0.48977 8.6226E-4 3.95135E-4
27 0.49109 9.89381E-5 -7.64159E-4
28 0.49863 1.08447E-2 -9.30319E-3
29 0.49932 6.40102E-4 4.15006E-4
30 0.50000 -5.67918E-2 1.49148E-2
31 0.50798 4.17032E-3 3.34252E-3
32 0.50924 2.6363E-3 2.59906E-4
33 0.51606 -2.10673E-3 1.78326E-4
34 0.51679 1.96442E-3 3.32256E-3
35 0.51753 -2.1637E-1 3.09143E-1
36 0.51826 -8.79185E-4 -4.99001E-3
37 0.52608 -1.56705E-2 1.49903E-2
38 0.52743 9.81315E-2 4.04056E-2
39 0.53632 1.60368E-2 9.78686E-3
40 0.53772 1.88149E-3 -1.65764E-2
41 0.54697 2.06655E-3 -4.35058E-3
42 0.54843 -2.70567E-3 -2.80053E-4
43 0.89909 2.22228E-5 -3.2081E-4
44 0.92942 1.0745E-3 -4.47853E-4
45 0.93417 2.55664E-4 1.35082E-3
46 0.96244 -1.44968E-3 2.18871E-4
47 0.96696 4.05277E-4 4.62131E-4
48 0.99185 1.04248E-4 -1.49425E-4
49 0.99455 4.12632E-4 5.4726E-6
50 0.99727 8.77094E-3 4.01542E-2
51 1.00000 1.64063E-3 3.06258E-3
52 1.00275 1.68086E-3 1.17345E-2
53 1.00551 -8.75244E-4 9.1612E-4
54 1.02954 7.02565E-4 9.10076E-4
55 1.03472 1.22545E-3 -1.17965E-3
56 1.04061 -3.62232E-5 -2.00459E-4
57 1.06951 -3.239E-4 4.14755E-4
58 1.07581 2.57809E-2 8.67998E-3
59 1.11346 9.99258E-4 -2.0438E-4
60 1.11951 1.05981E-3 -4.95762E-3
61 1.16035 -9.1906E-5 -1.21673E-4
62 1.16693 -8.63818E-4 -1.09532E-4
63 1.21136 8.07217E-4 8.77501E-4
64 13.66079 2.14448E-3 -7.44981E-3
65 14.76529 -8.13889E-4 6.16753E-3
66 27.55455 1.21727E-2 1.29643E-3
67 31.81193 -1.26231E-2 1.00966E-2
68 182.62118 -9.70353E-3 -2.17331E-2
69 365.25998 -1.2712E-2 9.42783E-3
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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