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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)
03 Nov 2026 14:03:00
Latency
6930
Level
0.88

Harmonics

Points count
5550371
First date
29 Apr 2011 19:11
Last date
03 Nov 2026 14:03

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 5.27706E-1 0E+0
1 0.12877 1.87551E-4 -6.60269E-5
2 0.12886 -8.23216E-6 1.13008E-5
3 0.12938 -1.20365E-4 1.39425E-4
4 0.14707 -4.91671E-5 4.97586E-5
5 0.16841 -1.52327E-4 -1.04802E-4
6 0.16857 1.80211E-4 2.63168E-5
7 0.17036 4.15009E-6 3.72835E-4
8 0.17052 -2.82565E-4 -9.36601E-4
9 0.17251 -1.17567E-3 -4.17916E-4
10 0.17470 1.07764E-4 1.02114E-4
11 0.19989 6.11511E-4 1.5475E-4
12 0.20545 -3.85758E-4 -3.07714E-5
13 0.24966 -6.63175E-5 7.07534E-4
14 0.25000 4.24072E-4 5.48687E-4
15 0.25395 -4.09153E-5 -2.58159E-4
16 0.25431 -8.85266E-4 3.25822E-4
17 0.25631 -1.49602E-4 1.72882E-4
18 0.25667 2.19534E-4 3.71875E-4
19 0.25876 2.06563E-3 -2.25502E-3
20 0.26122 -1.51054E-3 3.05778E-4
21 0.33303 1.75621E-3 1.5073E-3
22 0.34071 -1.01675E-4 1.10419E-4
23 0.34135 -2.22217E-4 -2.53041E-4
24 0.34502 -1.8915E-3 3.9053E-3
25 0.34943 5.17069E-4 4.49029E-4
26 0.48977 9.08526E-4 3.43677E-4
27 0.49109 -1.18524E-4 -8.63218E-4
28 0.49863 1.15788E-2 -1.00249E-2
29 0.49932 6.82284E-4 6.59328E-4
30 0.50000 -5.72579E-2 1.51475E-2
31 0.50798 4.32788E-3 3.64041E-3
32 0.50924 2.38206E-3 -1.21675E-4
33 0.51606 -1.731E-3 3.01798E-5
34 0.51679 7.2501E-4 3.21811E-3
35 0.51753 -2.14068E-1 3.07058E-1
36 0.51826 -3.1607E-4 -3.42127E-3
37 0.52608 -1.50738E-2 1.47477E-2
38 0.52743 9.77487E-2 4.09058E-2
39 0.53632 1.5828E-2 9.79295E-3
40 0.53772 2.15651E-3 -1.64261E-2
41 0.54697 2.15779E-3 -4.43988E-3
42 0.54843 -2.55766E-3 -3.34223E-4
43 0.89909 1.00041E-4 -1.04262E-4
44 0.92942 1.15362E-3 -6.23384E-4
45 0.93417 2.72049E-4 1.28801E-3
46 0.96244 -1.4371E-3 5.95597E-4
47 0.96696 2.81006E-4 3.82925E-4
48 0.99185 -3.02764E-5 1.04557E-5
49 0.99455 1.42049E-4 -1.49784E-4
50 0.99727 9.69686E-3 4.10367E-2
51 1.00000 1.45415E-3 2.71918E-3
52 1.00275 1.68533E-3 1.17912E-2
53 1.00551 -7.09048E-4 8.21368E-4
54 1.02954 5.28542E-4 8.60008E-4
55 1.03472 1.58775E-3 -1.00066E-3
56 1.04061 -2.45127E-4 -7.76137E-5
57 1.06951 -5.82111E-4 2.54884E-4
58 1.07581 2.67198E-2 9.52333E-3
59 1.11346 9.95659E-4 -2.1678E-5
60 1.11951 1.16447E-3 -5.10162E-3
61 1.16035 -6.711E-5 -2.1288E-4
62 1.16693 -8.7255E-4 5.65514E-5
63 1.21136 7.50027E-4 6.74426E-4
64 13.66079 3.59318E-4 -8.56876E-3
65 14.76529 -2.12893E-4 5.27656E-3
66 27.55455 8.26096E-3 1.39302E-3
67 31.81193 -1.06767E-2 7.7616E-3
68 182.62118 -8.35085E-3 -1.69771E-2
69 365.25998 -8.8383E-3 1.59747E-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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