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Tide Gauge Details - Chile - Arica_CL

Device description

Name
Chile - Arica_CL
Country
Chile
Group
TD UNESCO
Lat/Lon
-18.4758 / -70.323227

Last measured values

Time(UTC)
07 Oct 2025 08:57:00
Latency
6352
Level
2.3

Harmonics

Points count
6317815
First date
02 May 2011 22:15
Last date
07 Oct 2025 08:57

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 2.4859E+0 0E+0
1 0.12877 1.0558E-4 2.69222E-5
2 0.12886 -2.40305E-4 7.92889E-5
3 0.12938 8.82077E-5 -5.97715E-5
4 0.14707 4.17246E-5 -8.64219E-5
5 0.16841 -2.27168E-4 7.13595E-5
6 0.16857 -3.33739E-5 3.63907E-5
7 0.17036 1.14093E-4 1.14341E-4
8 0.17052 -5.00071E-4 -4.47191E-4
9 0.17251 7.5754E-4 7.2768E-4
10 0.17470 -2.58573E-4 7.13568E-7
11 0.19989 5.83E-5 4.46008E-5
12 0.20545 -5.35964E-5 1.84447E-4
13 0.24966 6.43479E-5 9.79198E-5
14 0.25000 -1.77657E-4 1.05126E-4
15 0.25395 3.40598E-4 -1.87207E-4
16 0.25431 2.87114E-4 1.54372E-4
17 0.25631 -2.36259E-4 7.34547E-5
18 0.25667 -3.48702E-4 -1.53904E-4
19 0.25876 -1.0333E-3 -7.02637E-4
20 0.26122 6.25931E-5 2.29633E-4
21 0.33303 4.50393E-4 -9.84773E-4
22 0.34071 2.3696E-4 1.31834E-4
23 0.34135 6.21201E-4 8.78263E-4
24 0.34502 7.50759E-3 -2.72725E-3
25 0.34943 1.21994E-4 -1.81174E-3
26 0.48977 1.7773E-3 -1.6005E-3
27 0.49109 4.45394E-4 -1.09591E-3
28 0.49863 -2.80095E-2 -1.60425E-2
29 0.49932 -1.14085E-3 -1.68062E-3
30 0.50000 6.28821E-2 7.74617E-2
31 0.50798 -2.8918E-3 -6.8217E-3
32 0.50924 5.07031E-4 3.17058E-3
33 0.51606 -1.79394E-4 3.00462E-4
34 0.51679 -1.13988E-3 6.35633E-4
35 0.51753 3.04414E-1 -1.5982E-1
36 0.51826 1.07859E-3 4.39823E-3
37 0.52608 1.09734E-2 -8.85522E-3
38 0.52743 -6.54228E-2 -4.04618E-2
39 0.53632 -1.29532E-2 -1.29945E-2
40 0.53772 6.49405E-4 9.70339E-3
41 0.54697 -1.15907E-3 4.58983E-3
42 0.54843 1.10838E-3 -4.67041E-4
43 0.89909 6.7745E-4 1.25469E-3
44 0.92942 5.20686E-3 -3.32348E-3
45 0.93417 -6.04197E-4 -8.72096E-4
46 0.96244 -7.20658E-3 4.41488E-3
47 0.96696 1.27048E-3 9.45175E-4
48 0.99185 -3.08479E-3 -9.74335E-4
49 0.99455 2.48124E-4 5.70731E-4
50 0.99727 1.37625E-1 7.30709E-2
51 1.00000 4.4571E-4 -5.90166E-3
52 1.00275 3.74392E-2 2.90376E-2
53 1.00551 1.84085E-3 1.61582E-3
54 1.02954 8.6796E-4 1.05862E-3
55 1.03472 2.88879E-3 -6.95962E-3
56 1.04061 -2.33961E-4 8.25821E-4
57 1.06951 1.50389E-3 -9.72636E-4
58 1.07581 4.33185E-2 -7.2962E-2
59 1.11346 1.3429E-3 -2.35117E-3
60 1.11951 -1.472E-2 -2.77151E-3
61 1.16035 -1.9448E-3 -7.10398E-4
62 1.16693 9.23355E-4 1.21041E-3
63 1.21136 -1.27002E-4 8.57674E-5
64 13.66079 8.32756E-4 -8.42117E-3
65 14.76529 1.2379E-3 -2.3408E-6
66 27.55455 -2.27602E-3 7.3585E-3
67 31.81193 9.4366E-4 -2.07127E-3
68 182.62118 -1.88873E-3 -5.93746E-3
69 365.25998 -4.2534E-3 3.65753E-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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