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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)
16 Aug 2026 21:03:00
Latency
4923
Level
0.83

Harmonics

Points count
5439405
First date
29 Apr 2011 19:11
Last date
16 Aug 2026 20:57

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 5.29111E-1 0E+0
1 0.12877 1.90075E-4 -7.22654E-5
2 0.12886 -1.92758E-5 1.85895E-5
3 0.12938 -1.27074E-4 1.48621E-4
4 0.14707 -4.87732E-5 5.39236E-5
5 0.16841 -1.63878E-4 -1.02281E-4
6 0.16857 1.92096E-4 3.04512E-5
7 0.17036 -1.45476E-6 3.71547E-4
8 0.17052 -2.86478E-4 -9.4008E-4
9 0.17251 -1.22586E-3 -4.29459E-4
10 0.17470 1.24004E-4 1.12651E-4
11 0.19989 6.04833E-4 1.47376E-4
12 0.20545 -3.82074E-4 -2.7407E-5
13 0.24966 -5.00746E-5 7.04004E-4
14 0.25000 4.16445E-4 5.43305E-4
15 0.25395 -4.70081E-5 -2.44747E-4
16 0.25431 -8.70637E-4 3.19205E-4
17 0.25631 -1.6214E-4 1.61497E-4
18 0.25667 2.32195E-4 3.55992E-4
19 0.25876 2.03148E-3 -2.3386E-3
20 0.26122 -1.55129E-3 3.19096E-4
21 0.33303 1.76306E-3 1.53608E-3
22 0.34071 -1.33682E-4 1.10671E-4
23 0.34135 -1.99834E-4 -2.44571E-4
24 0.34502 -1.88337E-3 3.9128E-3
25 0.34943 5.24813E-4 4.98746E-4
26 0.48977 9.16535E-4 3.51587E-4
27 0.49109 -1.03981E-4 -8.68539E-4
28 0.49863 1.15703E-2 -9.95769E-3
29 0.49932 6.01519E-4 6.3451E-4
30 0.50000 -5.72272E-2 1.50753E-2
31 0.50798 4.33296E-3 3.71992E-3
32 0.50924 2.27495E-3 -1.23804E-4
33 0.51606 -1.60523E-3 -2.71184E-4
34 0.51679 1.01131E-3 3.39542E-3
35 0.51753 -2.14289E-1 3.07287E-1
36 0.51826 -4.51404E-4 -3.64434E-3
37 0.52608 -1.51377E-2 1.4766E-2
38 0.52743 9.77282E-2 4.07811E-2
39 0.53632 1.58114E-2 9.7244E-3
40 0.53772 2.16764E-3 -1.64425E-2
41 0.54697 2.15186E-3 -4.41417E-3
42 0.54843 -2.58999E-3 -3.34512E-4
43 0.89909 1.00873E-4 -9.65986E-5
44 0.92942 1.15949E-3 -6.0892E-4
45 0.93417 2.8508E-4 1.27177E-3
46 0.96244 -1.4671E-3 5.46269E-4
47 0.96696 3.05405E-4 3.4905E-4
48 0.99185 4.32759E-5 -2.49859E-5
49 0.99455 1.57379E-4 -7.16379E-5
50 0.99727 9.60796E-3 4.10263E-2
51 1.00000 1.48924E-3 2.63985E-3
52 1.00275 1.74759E-3 1.18282E-2
53 1.00551 -7.40764E-4 8.5925E-4
54 1.02954 5.03674E-4 8.21215E-4
55 1.03472 1.61137E-3 -1.0433E-3
56 1.04061 -2.77896E-4 -5.96957E-5
57 1.06951 -5.32146E-4 3.61425E-4
58 1.07581 2.66365E-2 9.39102E-3
59 1.11346 9.85415E-4 -2.22329E-5
60 1.11951 1.15968E-3 -5.07911E-3
61 1.16035 -3.04266E-5 -2.16914E-4
62 1.16693 -8.66983E-4 7.67604E-5
63 1.21136 7.15852E-4 6.88797E-4
64 13.66079 6.06959E-4 -8.62993E-3
65 14.76529 -3.96214E-4 5.39256E-3
66 27.55455 9.00668E-3 1.61447E-3
67 31.81193 -1.03676E-2 8.6135E-3
68 182.62118 -1.04138E-2 -1.70479E-2
69 365.25998 -8.91567E-3 1.33836E-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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