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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)
17 Jul 2025 00:57:00
Latency
7224
Level
0.61

Harmonics

Points count
5162906
First date
29 Apr 2011 19:11
Last date
17 Jul 2025 00:57

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 5.31644E-1 0E+0
1 0.12877 2.07226E-4 -6.57484E-5
2 0.12886 -4.4289E-5 1.49163E-5
3 0.12938 -1.43138E-4 1.67387E-4
4 0.14707 -6.6936E-5 6.89427E-5
5 0.16841 -1.86437E-4 -8.42225E-5
6 0.16857 1.78168E-4 1.11308E-5
7 0.17036 3.72778E-6 3.69393E-4
8 0.17052 -3.09592E-4 -9.52081E-4
9 0.17251 -1.25977E-3 -4.53496E-4
10 0.17470 1.22721E-4 1.4353E-4
11 0.19989 5.77787E-4 8.6336E-5
12 0.20545 -3.7678E-4 -5.82347E-5
13 0.24966 -5.92682E-5 6.83828E-4
14 0.25000 4.35757E-4 5.67811E-4
15 0.25395 -8.96084E-5 -2.31165E-4
16 0.25431 -8.35805E-4 2.90803E-4
17 0.25631 -1.47678E-4 1.27138E-4
18 0.25667 2.35315E-4 3.86498E-4
19 0.25876 2.05443E-3 -2.36201E-3
20 0.26122 -1.59903E-3 2.9472E-4
21 0.33303 1.70014E-3 1.5369E-3
22 0.34071 -1.26539E-4 8.65633E-5
23 0.34135 -2.08373E-4 -1.61568E-4
24 0.34502 -1.94988E-3 3.90565E-3
25 0.34943 5.17387E-4 6.12833E-4
26 0.48977 9.44582E-4 3.44989E-4
27 0.49109 -7.7361E-5 -8.49432E-4
28 0.49863 1.13988E-2 -9.87544E-3
29 0.49932 5.75542E-4 4.33504E-4
30 0.50000 -5.71736E-2 1.50594E-2
31 0.50798 4.18046E-3 3.5895E-3
32 0.50924 2.34907E-3 -4.34724E-5
33 0.51606 -1.70569E-3 -3.46052E-4
34 0.51679 1.68893E-3 3.84256E-3
35 0.51753 -2.15287E-1 3.07991E-1
36 0.51826 -6.29587E-4 -4.54242E-3
37 0.52608 -1.52464E-2 1.48733E-2
38 0.52743 9.79798E-2 4.06565E-2
39 0.53632 1.58842E-2 9.69757E-3
40 0.53772 2.12221E-3 -1.65133E-2
41 0.54697 2.07285E-3 -4.44602E-3
42 0.54843 -2.66498E-3 -2.63789E-4
43 0.89909 5.10254E-5 -2.15413E-4
44 0.92942 1.07835E-3 -5.25069E-4
45 0.93417 2.67181E-4 1.3127E-3
46 0.96244 -1.46785E-3 4.62107E-4
47 0.96696 3.40298E-4 4.72655E-4
48 0.99185 1.45293E-4 -1.19357E-4
49 0.99455 1.69048E-4 2.34029E-5
50 0.99727 9.58426E-3 4.09466E-2
51 1.00000 1.59765E-3 2.71229E-3
52 1.00275 1.65674E-3 1.18878E-2
53 1.00551 -7.80562E-4 8.22337E-4
54 1.02954 5.13685E-4 8.52365E-4
55 1.03472 1.52105E-3 -1.18195E-3
56 1.04061 -2.14862E-4 -7.29936E-5
57 1.06951 -5.14108E-4 3.41441E-4
58 1.07581 2.64582E-2 9.08083E-3
59 1.11346 9.58127E-4 -8.26912E-5
60 1.11951 1.03338E-3 -4.99816E-3
61 1.16035 -8.13406E-5 -1.66225E-4
62 1.16693 -8.97945E-4 3.14292E-6
63 1.21136 8.26168E-4 6.93327E-4
64 13.66079 1.10482E-3 -8.49532E-3
65 14.76529 -5.40606E-4 5.43475E-3
66 27.55455 9.57616E-3 1.4343E-3
67 31.81193 -1.10432E-2 8.59683E-3
68 182.62118 -1.16765E-2 -1.62977E-2
69 365.25998 -1.02726E-2 9.63261E-3
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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