European Commission logo
World sea levels

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)
19 Aug 2026 17:03:00
Latency
3674
Level
0.26

Harmonics

Points count
5443047
First date
29 Apr 2011 19:11
Last date
19 Aug 2026 17:03

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 5.29097E-1 0E+0
1 0.12877 1.90482E-4 -7.12043E-5
2 0.12886 -1.83096E-5 1.81173E-5
3 0.12938 -1.26211E-4 1.48994E-4
4 0.14707 -4.80206E-5 5.49447E-5
5 0.16841 -1.63643E-4 -1.03072E-4
6 0.16857 1.91513E-4 3.02765E-5
7 0.17036 -2.57947E-6 3.71453E-4
8 0.17052 -2.86398E-4 -9.38982E-4
9 0.17251 -1.22538E-3 -4.30526E-4
10 0.17470 1.23591E-4 1.11534E-4
11 0.19989 6.05316E-4 1.46806E-4
12 0.20545 -3.80339E-4 -2.81887E-5
13 0.24966 -5.34199E-5 7.07044E-4
14 0.25000 4.19896E-4 5.46543E-4
15 0.25395 -4.41888E-5 -2.47696E-4
16 0.25431 -8.73606E-4 3.16848E-4
17 0.25631 -1.63838E-4 1.64152E-4
18 0.25667 2.35068E-4 3.56659E-4
19 0.25876 2.03293E-3 -2.33715E-3
20 0.26122 -1.55226E-3 3.18578E-4
21 0.33303 1.76329E-3 1.53565E-3
22 0.34071 -1.33446E-4 1.09723E-4
23 0.34135 -2.00999E-4 -2.44568E-4
24 0.34502 -1.88182E-3 3.91201E-3
25 0.34943 5.27094E-4 4.99589E-4
26 0.48977 9.17987E-4 3.69827E-4
27 0.49109 -8.58206E-5 -8.73224E-4
28 0.49863 1.15615E-2 -9.97559E-3
29 0.49932 6.20815E-4 6.37146E-4
30 0.50000 -5.72437E-2 1.50865E-2
31 0.50798 4.31108E-3 3.72229E-3
32 0.50924 2.28523E-3 -1.42721E-4
33 0.51606 -1.59532E-3 -2.51421E-4
34 0.51679 9.89891E-4 3.39083E-3
35 0.51753 -2.14272E-1 3.07274E-1
36 0.51826 -4.5503E-4 -3.62246E-3
37 0.52608 -1.51152E-2 1.47621E-2
38 0.52743 9.77175E-2 4.0801E-2
39 0.53632 1.57933E-2 9.73742E-3
40 0.53772 2.16788E-3 -1.6465E-2
41 0.54697 2.16124E-3 -4.43321E-3
42 0.54843 -2.58182E-3 -3.1532E-4
43 0.89909 1.06201E-4 -8.60924E-5
44 0.92942 1.14942E-3 -6.15557E-4
45 0.93417 2.8041E-4 1.28274E-3
46 0.96244 -1.47585E-3 5.53699E-4
47 0.96696 3.04303E-4 3.37856E-4
48 0.99185 5.23364E-5 -2.04692E-5
49 0.99455 1.48475E-4 -6.75833E-5
50 0.99727 9.61088E-3 4.1017E-2
51 1.00000 1.49428E-3 2.64786E-3
52 1.00275 1.73828E-3 1.18274E-2
53 1.00551 -7.33491E-4 8.53227E-4
54 1.02954 5.08552E-4 8.14511E-4
55 1.03472 1.61384E-3 -1.03524E-3
56 1.04061 -2.70711E-4 -6.28446E-5
57 1.06951 -5.32277E-4 3.68064E-4
58 1.07581 2.66426E-2 9.39014E-3
59 1.11346 9.90034E-4 -2.17274E-5
60 1.11951 1.15693E-3 -5.07585E-3
61 1.16035 -3.21972E-5 -2.14748E-4
62 1.16693 -8.67893E-4 7.43066E-5
63 1.21136 7.14046E-4 6.8688E-4
64 13.66079 6.03873E-4 -8.60512E-3
65 14.76529 -3.71385E-4 5.39245E-3
66 27.55455 9.03036E-3 1.62641E-3
67 31.81193 -1.03911E-2 8.62543E-3
68 182.62118 -1.04095E-2 -1.70741E-2
69 365.25998 -8.89883E-3 1.34023E-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

Start
End