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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)
03 Apr 2025 02:57:00
Latency
1778
Level
0.24

Harmonics

Points count
5017064
First date
29 Apr 2011 19:11
Last date
03 Apr 2025 02:57

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 5.32893E-1 0E+0
1 0.12877 2.17541E-4 -6.53747E-5
2 0.12886 -5.00193E-5 1.69789E-5
3 0.12938 -1.53106E-4 1.65882E-4
4 0.14707 -6.6995E-5 7.3327E-5
5 0.16841 -1.91379E-4 -8.78162E-5
6 0.16857 1.79174E-4 1.34807E-5
7 0.17036 -6.68145E-6 3.75404E-4
8 0.17052 -3.31826E-4 -9.68176E-4
9 0.17251 -1.28726E-3 -4.55252E-4
10 0.17470 1.32681E-4 1.60471E-4
11 0.19989 5.685E-4 1.02684E-4
12 0.20545 -3.6991E-4 -4.75173E-5
13 0.24966 -7.7451E-5 7.20264E-4
14 0.25000 4.03727E-4 5.48397E-4
15 0.25395 -1.16475E-4 -2.3814E-4
16 0.25431 -8.06796E-4 2.69019E-4
17 0.25631 -1.71426E-4 1.28657E-4
18 0.25667 2.34515E-4 3.62201E-4
19 0.25876 2.00384E-3 -2.39443E-3
20 0.26122 -1.63015E-3 2.44051E-4
21 0.33303 1.66385E-3 1.54909E-3
22 0.34071 -1.29293E-4 8.63173E-5
23 0.34135 -2.07234E-4 -1.59373E-4
24 0.34502 -1.95771E-3 3.88758E-3
25 0.34943 5.17676E-4 6.43759E-4
26 0.48977 9.5862E-4 3.90363E-4
27 0.49109 -4.34653E-5 -8.15816E-4
28 0.49863 1.13038E-2 -9.7903E-3
29 0.49932 6.94447E-4 3.9633E-4
30 0.50000 -5.72302E-2 1.50479E-2
31 0.50798 4.02881E-3 3.53429E-3
32 0.50924 2.49441E-3 5.51447E-5
33 0.51606 -1.84369E-3 -1.87452E-4
34 0.51679 1.90145E-3 3.65911E-3
35 0.51753 -2.15588E-1 3.08149E-1
36 0.51826 -3.11537E-4 -4.59634E-3
37 0.52608 -1.54721E-2 1.49739E-2
38 0.52743 9.8103E-2 4.06118E-2
39 0.53632 1.59234E-2 9.7939E-3
40 0.53772 2.06963E-3 -1.65808E-2
41 0.54697 2.0838E-3 -4.4055E-3
42 0.54843 -2.68694E-3 -2.79453E-4
43 0.89909 7.46368E-6 -2.42894E-4
44 0.92942 1.07523E-3 -4.83336E-4
45 0.93417 2.89655E-4 1.31277E-3
46 0.96244 -1.48182E-3 4.5E-4
47 0.96696 3.47972E-4 5.33834E-4
48 0.99185 2.45657E-5 -3.82115E-5
49 0.99455 3.74423E-4 4.53809E-5
50 0.99727 9.44485E-3 4.07767E-2
51 1.00000 1.57796E-3 2.89986E-3
52 1.00275 1.76119E-3 1.18026E-2
53 1.00551 -8.53101E-4 8.12821E-4
54 1.02954 6.08003E-4 9.03758E-4
55 1.03472 1.41931E-3 -1.24005E-3
56 1.04061 -1.6851E-4 -1.1824E-4
57 1.06951 -5.23693E-4 4.24418E-4
58 1.07581 2.63841E-2 9.03342E-3
59 1.11346 9.64308E-4 -7.43768E-5
60 1.11951 1.05738E-3 -5.00025E-3
61 1.16035 -1.16402E-4 -1.23147E-4
62 1.16693 -8.64327E-4 -2.95391E-5
63 1.21136 8.21436E-4 7.43677E-4
64 13.66079 1.45068E-3 -8.30634E-3
65 14.76529 -6.14903E-4 5.81335E-3
66 27.55455 1.01893E-2 1.11536E-3
67 31.81193 -1.13915E-2 9.10074E-3
68 182.62118 -1.03542E-2 -1.78435E-2
69 365.25998 -1.24335E-2 1.07059E-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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