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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)
13 Nov 2025 13:57:00
Latency
1308
Level
0.88

Harmonics

Points count
5329475
First date
29 Apr 2011 19:11
Last date
13 Nov 2025 11:57

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 5.3002E-1 0E+0
1 0.12877 1.92025E-4 -7.27705E-5
2 0.12886 -2.09381E-5 1.84413E-5
3 0.12938 -1.28099E-4 1.5427E-4
4 0.14707 -4.94985E-5 6.00007E-5
5 0.16841 -1.71977E-4 -1.11951E-4
6 0.16857 1.92463E-4 2.13369E-5
7 0.17036 -5.55535E-6 3.70667E-4
8 0.17052 -2.90661E-4 -9.39544E-4
9 0.17251 -1.25152E-3 -4.35858E-4
10 0.17470 1.30377E-4 1.25803E-4
11 0.19989 5.98124E-4 1.23877E-4
12 0.20545 -3.85292E-4 -2.37901E-5
13 0.24966 -4.33799E-5 7.05547E-4
14 0.25000 4.16704E-4 5.62387E-4
15 0.25395 -4.96417E-5 -2.22237E-4
16 0.25431 -8.70249E-4 3.21621E-4
17 0.25631 -1.54376E-4 1.46631E-4
18 0.25667 2.29382E-4 3.64994E-4
19 0.25876 2.02147E-3 -2.35502E-3
20 0.26122 -1.58598E-3 3.27869E-4
21 0.33303 1.73512E-3 1.53099E-3
22 0.34071 -1.65586E-4 1.01402E-4
23 0.34135 -2.14118E-4 -2.36835E-4
24 0.34502 -1.89773E-3 3.90057E-3
25 0.34943 5.40615E-4 5.51617E-4
26 0.48977 8.87197E-4 3.47054E-4
27 0.49109 -1.08358E-4 -8.50625E-4
28 0.49863 1.1563E-2 -9.91677E-3
29 0.49932 6.31014E-4 6.20468E-4
30 0.50000 -5.72618E-2 1.5113E-2
31 0.50798 4.22682E-3 3.75384E-3
32 0.50924 2.40592E-3 -1.48624E-4
33 0.51606 -1.91128E-3 -1.94673E-4
34 0.51679 1.24298E-3 3.3625E-3
35 0.51753 -2.14593E-1 3.0752E-1
36 0.51826 -4.14017E-4 -3.91902E-3
37 0.52608 -1.51863E-2 1.47733E-2
38 0.52743 9.78474E-2 4.07192E-2
39 0.53632 1.57753E-2 9.75296E-3
40 0.53772 2.17032E-3 -1.64592E-2
41 0.54697 2.20521E-3 -4.42319E-3
42 0.54843 -2.62806E-3 -3.44227E-4
43 0.89909 9.74922E-5 -1.15538E-4
44 0.92942 1.1735E-3 -5.90341E-4
45 0.93417 2.93208E-4 1.30469E-3
46 0.96244 -1.4445E-3 4.85087E-4
47 0.96696 2.73406E-4 3.83901E-4
48 0.99185 3.16144E-5 -2.05516E-5
49 0.99455 1.28405E-4 -6.67265E-5
50 0.99727 9.60589E-3 4.09987E-2
51 1.00000 1.47587E-3 2.65201E-3
52 1.00275 1.73931E-3 1.1766E-2
53 1.00551 -6.99592E-4 8.8021E-4
54 1.02954 5.11175E-4 8.76172E-4
55 1.03472 1.62885E-3 -1.11477E-3
56 1.04061 -2.60995E-4 -1.03204E-4
57 1.06951 -5.70028E-4 3.18587E-4
58 1.07581 2.65677E-2 9.29227E-3
59 1.11346 1.01524E-3 -2.98499E-5
60 1.11951 1.16929E-3 -5.06237E-3
61 1.16035 -2.12681E-5 -1.90339E-4
62 1.16693 -8.90881E-4 4.6837E-5
63 1.21136 7.74729E-4 7.03052E-4
64 13.66079 6.42218E-4 -8.49253E-3
65 14.76529 -2.81896E-4 5.4971E-3
66 27.55455 9.30621E-3 1.62332E-3
67 31.81193 -1.08153E-2 8.61654E-3
68 182.62118 -9.47642E-3 -1.61291E-2
69 365.25998 -1.01332E-2 1.25836E-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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