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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 Sep 2026 19:03:00
Latency
775
Level
0.4

Harmonics

Points count
5492200
First date
29 Apr 2011 19:11
Last date
23 Sep 2026 14:57

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 5.28593E-1 0E+0
1 0.12877 1.91972E-4 -6.76043E-5
2 0.12886 -1.4629E-5 1.4381E-5
3 0.12938 -1.27564E-4 1.48285E-4
4 0.14707 -5.25957E-5 5.39161E-5
5 0.16841 -1.56378E-4 -1.05366E-4
6 0.16857 1.84017E-4 2.67715E-5
7 0.17036 -9.86452E-8 3.78362E-4
8 0.17052 -2.83989E-4 -9.48119E-4
9 0.17251 -1.20065E-3 -4.26138E-4
10 0.17470 1.13467E-4 1.09352E-4
11 0.19989 6.11599E-4 1.5287E-4
12 0.20545 -3.83464E-4 -2.30616E-5
13 0.24966 -5.96669E-5 7.05066E-4
14 0.25000 4.21449E-4 5.51969E-4
15 0.25395 -4.63367E-5 -2.53519E-4
16 0.25431 -8.75345E-4 3.20352E-4
17 0.25631 -1.619E-4 1.71828E-4
18 0.25667 2.32186E-4 3.5288E-4
19 0.25876 2.05174E-3 -2.32168E-3
20 0.26122 -1.54375E-3 3.26555E-4
21 0.33303 1.75706E-3 1.52214E-3
22 0.34071 -1.14645E-4 1.06613E-4
23 0.34135 -2.17029E-4 -2.55859E-4
24 0.34502 -1.89114E-3 3.89897E-3
25 0.34943 5.27617E-4 4.80553E-4
26 0.48977 9.26711E-4 3.48425E-4
27 0.49109 -1.20288E-4 -8.60489E-4
28 0.49863 1.15694E-2 -9.99183E-3
29 0.49932 6.30677E-4 6.52875E-4
30 0.50000 -5.72519E-2 1.50836E-2
31 0.50798 4.27031E-3 3.67751E-3
32 0.50924 2.31351E-3 -1.56374E-4
33 0.51606 -1.63429E-3 -7.64509E-5
34 0.51679 8.44381E-4 3.28583E-3
35 0.51753 -2.14108E-1 3.07179E-1
36 0.51826 -4.49412E-4 -3.43918E-3
37 0.52608 -1.50583E-2 1.47443E-2
38 0.52743 9.77356E-2 4.08915E-2
39 0.53632 1.58113E-2 9.74874E-3
40 0.53772 2.15064E-3 -1.64569E-2
41 0.54697 2.12985E-3 -4.42914E-3
42 0.54843 -2.57327E-3 -3.37577E-4
43 0.89909 1.0582E-4 -9.64627E-5
44 0.92942 1.16265E-3 -6.16721E-4
45 0.93417 2.65931E-4 1.27591E-3
46 0.96244 -1.45434E-3 5.60905E-4
47 0.96696 2.83991E-4 3.55683E-4
48 0.99185 -1.13401E-9 1.51942E-5
49 0.99455 1.38527E-4 -1.24887E-4
50 0.99727 9.66394E-3 4.10325E-2
51 1.00000 1.45686E-3 2.68279E-3
52 1.00275 1.72393E-3 1.17843E-2
53 1.00551 -6.95014E-4 8.62738E-4
54 1.02954 5.1748E-4 8.36943E-4
55 1.03472 1.58492E-3 -1.02189E-3
56 1.04061 -2.41769E-4 -5.14175E-5
57 1.06951 -5.86735E-4 3.48384E-4
58 1.07581 2.6676E-2 9.44749E-3
59 1.11346 9.6683E-4 1.2721E-8
60 1.11951 1.1355E-3 -5.09898E-3
61 1.16035 -6.56426E-5 -2.10482E-4
62 1.16693 -8.67218E-4 4.27052E-5
63 1.21136 7.32749E-4 6.86621E-4
64 13.66079 4.56726E-4 -8.73154E-3
65 14.76529 -3.12394E-4 5.58741E-3
66 27.55455 8.735E-3 1.85385E-3
67 31.81193 -1.04915E-2 8.35119E-3
68 182.62118 -9.74875E-3 -1.78018E-2
69 365.25998 -8.47753E-3 1.42992E-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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