HARMONIC ANALYSIS AND PREDICTION OF TIDES 
(3) and (7) respectively. If the series is 192 days or more in length, 
the « of M,, P;, and K, for column (4), and the log R of M,, P,, and 
K, for column (8) may be taken directly from form 194, and if the 
series is 355 days or more in length the « and log RF of all the com- 
ponents for which analyses have been made may be taken directly 
from the same form. When a value is thus taken directly from the 
analysis, the corresponding equivalent in column (3) and factors in 
column (7) are to be crossed out. 
324. The tabular values of items (12) and (13) for the diurnal con- 
stituents and items (14) to (18) for the semidiurnal constituents may 
be obtained from tables 21 to 26 or from plotted curves representing 
these tables, but for a series of 355 days or more in length the acceler- 
ations may’be taken as zero and the resultant amplitude factors as 
unity. 
Form 452 
DEPARTMENT OF COMMERCE 
U. S. COAST AND GEODETIC SURVEY 
TIDES: A, «, AND ¢, FROM ANALYSIS AND INFERENCE. 
115 
concent Ser rer days. Series begins EaO1S ake bruaryel SE eee eee 
DIURNAL COMPONENTS. 
FIGURE 17. 
3 From ANALYSIS AND INFERENCE. 2 FRoM ANALYSIS AND INFERENCE. | 
oO _ | 
2 F Veotu* [$=0-6)] 8 R 
a @) () (6) a (2) @) 
o Equivalent. °(1dec.) | ° (0 dec.) o Factors. (4 dec.) 
3, | K+05x4).....|.. 226. 7 _|_150. -9 | 326. Ja) | 1oe0.079) 1 88 azi6 
K, | (Ky 08.84 (12).210-9_|__ 6020}. oe Py aes lees 
Ke ( . . ee NE SSO 
10.5 (14) oon asa ae santa fata nena | eanseeeS log. R(I,) 8.6589 
RG) 
K, | log. R(K,) | +9. 9852 
log. (13) — 0. 0128 
log. R(K,) 9- 9724 || 
R(K,) \ 
M, | log. 0.071 +8.8513) 
log. R(O,) + 9.7550 
log. Q,* = 9-8592 
log. R(M,) 8-7471 
(9)=P*= R(M,) | 
(12)=acceleration in K, due to P,=F(K,)XTable 21=..2e2. (1 dec.) =O, | lo R(0) | 9.7550 
(13)=resultant amplitude, K, and P,=1+[F(K,) X (Table 22)J=...L203___ (2 dec.) ; ane coma ; 
(4)=(Gj—07)=A 106 (1 dec.) 00 Jog. 0.043 |+8.6335| 
log. H/(O,) | +9. 7814 
Explanation.—Obtain from Form 194 the amplitudes and epochs indicated by the accent (’), log. F(00O)* | —0.0929 
and from Form 244 or 244a the quantities indicated by the asterisk (*). log. R(OO) 8-3220 
If the series is less than 355 days, omit S,. For all short series, the values in columns (4) R(OO) 
and (8) will be computed in accordance with the Equivalents and Factors in columns (3) and (7), P Ts=H0 = 
respectively; but if the series is 192 days or more in length, the x of M, and P, for column (4), ayy (og 10.330 + 9.5198 
and the log. R of M, and P, for column (8) may be taken directly from Form 194; and if the series log. R(K,) +9.9724 
is 355 days or morein length, the x and log. R ofall the components for which analysis has been made log. F(K,)*_|+0-0160 
may be taken directly from thesame form. Whena valueis thus taken directly from the analyeis, log. R(P,) 9-5082 
the corresponding equivalent in column (3) and factors in column (7) should be crossed out. R(P,) 
The tabular values for (12) and (13) may be obtained from Tables 21 and 22 in Special Publi- Q, | log. 0.194 
cation No. 98 or from plotted curves representing this table. For a series of 355 days or more, log. : R(O ) 
(12)=0, and (13)=1. Pog. R(Q,) 9.0428 
Obtain the x of K, by applying (12) to (K,°)’ from Form 194, and use this corrected x in com- ‘RQ ) ‘ 5 
puting (14). If the two angles in (14) differ by more than 180°, add 360° to the smaller before =} ——W——" "4 __- ________ 
taking the difference, which may be either positive or negative. 2Q | log. 0.026 + 8.4150 
In computing column (8) it will be noted that the corrected log. R(,) is to be used when log. R(O1:)_| +9.7550 
inferring P,. log. R(2Q) | 8-1700 
R(2Q) 
S, | log. R/(S,) =<= 
DSA UNS ac R(S,)=R/(S,) 
pi | log. 0.038 +8.5798 
log. R(O,)_| +9-7550 
log. R(x.) | §-3348 
R(o, 
