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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)
26 Jul 2026 14:57:00
Latency
1169
Level
0.7

Harmonics

Points count
5410334
First date
29 Apr 2011 19:11
Last date
26 Jul 2026 13:03

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 5.2956E-1 0E+0
1 0.12877 1.91351E-4 -7.07052E-5
2 0.12886 -1.97136E-5 1.7068E-5
3 0.12938 -1.24902E-4 1.52471E-4
4 0.14707 -4.81191E-5 5.62654E-5
5 0.16841 -1.65554E-4 -1.03747E-4
6 0.16857 1.89585E-4 3.11636E-5
7 0.17036 -7.88904E-7 3.69307E-4
8 0.17052 -2.87801E-4 -9.39771E-4
9 0.17251 -1.23713E-3 -4.29887E-4
10 0.17470 1.2795E-4 1.15464E-4
11 0.19989 6.04567E-4 1.35833E-4
12 0.20545 -3.81503E-4 -2.95649E-5
13 0.24966 -5.7866E-5 7.01735E-4
14 0.25000 4.11828E-4 5.50381E-4
15 0.25395 -3.94162E-5 -2.34924E-4
16 0.25431 -8.62933E-4 3.15201E-4
17 0.25631 -1.62092E-4 1.47507E-4
18 0.25667 2.22689E-4 3.53595E-4
19 0.25876 2.02101E-3 -2.34881E-3
20 0.26122 -1.56596E-3 3.24744E-4
21 0.33303 1.76439E-3 1.5299E-3
22 0.34071 -1.46626E-4 1.1118E-4
23 0.34135 -2.03505E-4 -2.33305E-4
24 0.34502 -1.89221E-3 3.9027E-3
25 0.34943 5.27716E-4 5.16513E-4
26 0.48977 8.87074E-4 3.41067E-4
27 0.49109 -1.16969E-4 -8.48093E-4
28 0.49863 1.15946E-2 -9.9677E-3
29 0.49932 5.92254E-4 6.59676E-4
30 0.50000 -5.72339E-2 1.50463E-2
31 0.50798 4.27647E-3 3.74501E-3
32 0.50924 2.33603E-3 -1.89214E-4
33 0.51606 -1.73906E-3 -3.19532E-4
34 0.51679 1.15192E-3 3.35251E-3
35 0.51753 -2.14373E-1 3.07401E-1
36 0.51826 -4.43427E-4 -3.79067E-3
37 0.52608 -1.51461E-2 1.46951E-2
38 0.52743 9.77629E-2 4.08095E-2
39 0.53632 1.57942E-2 9.75728E-3
40 0.53772 2.15655E-3 -1.64735E-2
41 0.54697 2.14704E-3 -4.42143E-3
42 0.54843 -2.58137E-3 -3.27105E-4
43 0.89909 1.16373E-4 -9.66463E-5
44 0.92942 1.16141E-3 -6.1166E-4
45 0.93417 2.79408E-4 1.27811E-3
46 0.96244 -1.45762E-3 5.21485E-4
47 0.96696 3.07457E-4 3.69907E-4
48 0.99185 4.66186E-5 -1.12933E-5
49 0.99455 1.44695E-4 -7.83581E-5
50 0.99727 9.62381E-3 4.10279E-2
51 1.00000 1.47377E-3 2.65128E-3
52 1.00275 1.75076E-3 1.18081E-2
53 1.00551 -7.3167E-4 8.79765E-4
54 1.02954 4.99961E-4 8.35898E-4
55 1.03472 1.60328E-3 -1.06063E-3
56 1.04061 -2.91128E-4 -4.96403E-5
57 1.06951 -5.16613E-4 3.40106E-4
58 1.07581 2.66117E-2 9.37064E-3
59 1.11346 1.01426E-3 -3.39216E-5
60 1.11951 1.14291E-3 -5.0546E-3
61 1.16035 -3.41379E-5 -2.02283E-4
62 1.16693 -8.73132E-4 6.1257E-5
63 1.21136 7.32269E-4 7.06776E-4
64 13.66079 5.29395E-4 -8.48128E-3
65 14.76529 -3.19198E-4 5.51403E-3
66 27.55455 9.37568E-3 1.75792E-3
67 31.81193 -1.08395E-2 8.66013E-3
68 182.62118 -1.01353E-2 -1.6219E-2
69 365.25998 -9.64292E-3 1.2879E-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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