Origin

Symbol

Amplitude

Speed per mean

Period in solar

(cm)

(solar hour)

(hours)

Long-period components

Solar semi-annual

Ssa

1.9416

0.08213

2191.43

Lunar monthly

Mm

2.2056

0.54437

661.3

Lunar fortnightly

Mf

4.1765

1.09803

327.86

Diurnal components

Larger lunar elliptic

Q1

1.9469

13.39867

26.87

Principle lunar diurnal

O1

10.0573

13.94303

25.82

Smaller lunar elliptic

M1

0.9788

14.49669

24.83

Principle solar diurnal

P1

4.6806

14.95893

24.07

Luni-solar diurnal

K1

14.1484

15.04107

23.93

Small lunar elliptic

J1

0.7921

15.58544

23.1

Semi-diurnal components

Larger lunar elliptic

N2

4.6313

28.43973

12.66

Principle lunar

M2

24.2297

28.98411

12.42

Smaller lunar elliptic

L2

0.6694

29.52848

12.19

Larger solar elliptic

T2

0.6614

29.95893

12.02

Principle solar

S2

11.2734

30

12

Luni-solar semi-diurnal

K2

3.0697

30.08214

11.97

Lunarelliptic second order

2N2

0.6074925

27.89535

12.91

Lager lunar evectional

δ2

0.8747892

28.51258

12.63

Smaller lunar evectional

λ2

0.1700979

29.45563

12.22

Variational

μ2

0.7532907

27.96821

12.87