DOI Page / Citation link:
https://doi.org/10.11588/diglit.20131#0163
GROUP I. ASSAM AND KHASSIA HILLS. 141
o / o /
1. /* coit. = 4(j 2G-3 5 = — 15 10-6
6. h' corr. = 33 8"4 5'= — 15 12"6
Latitude N................... 25° 16'-2
Mean Noon (corr. for Equation of Time) 5h 44m 11s.
In this first' approximation, o is referred to a wrong date, where magnetic
observations were made, but no declination. In the second approximation, the correction
which exactly corresponds to the time of observation has been introduced, so that
the final result is not in the least altered.
Second Approximation.
The equation of time may be considered as constant, during the observations.
The latitude, as obtained from the first approximation, is assumed in round number
= 25° 17' N.
Group I.
Group II.
Time of Obs. by Chron. 3.
Apparent Noon.....
Hour Angle in Time . .
Hour Angle in Arc = t
5 (Sun's Declination) . .
sin 9 sin 8........
cos <p cos 5 cos t . . . .
Sum = sin h . . .
h (True Altitude of the
Sun's Centre) ....
+ Sun's Semidiameter.
Calculated Observation
Direct Observation . . .
5h 40m 22s
5h 27m 53s
5h 52m218
5h 27m 53s
Qh 0m 143
5h 27m 53s
gh 4m 49s
5h 27m 53s
8h gm 30s
5h 27m 53s
8" 11"' 50s
5" 27m53s
0h 12m 29s
3° 7'-3
— 15° 13'-8
— 0-11219
+ 0-87118
0" 24™ 28s
6° 7'-0
— 15° 13'-8
— 0-11219
+ 0-86750
011 32m 21s
8° 5'-3
— 15° 13'-8
— 0-11219
+ 0-86380
0h 36m 56s
9° 14'-0
— 15° 13'-8
— 0-11219
-h 0-86118
2h 38m 378
39° 39'-3
— 15° 15'-5
— 0-11240
+ 0-67163
2i. 43m 57s
40° 59'-3
— 15° 15'-5
— 0-11240
+ 0-65849
0-75899
49° 22'-5
+ 0'-7
O'-l
+ 16'-2
0-75531
49° 3'-2
+ 0'-7
O'-l
-f 16'-2
0-75161
48° 43'-9
+ 0'-7
O'-l
+ 16'.2
0-74899
48° 30'-1
+ 0'-7
— O'-l
+ 16'-2
0-55923
34° 0'-2
+ l'-2
- O'-l
+ 16'-2
0-54609
33° 5'-9
+ l'-2
— O'-l
+ 16'-2
49° 39'-3
49°43'-0
49°20'-0
49° 23'-7
49° 0'-7
49° l'-2
48° 46'-9
48° 49'-8
34° 17'-5
-34° 19'-9
33° 23'-2
33° 25'-8
— 3'-7
i.
- 3'-7
(- 0'-5)
— 2'-9
- 2'-4
— 2'-6
>
Group A (excluding — 0'-5)
Group B.
o / o /
1. /* coit. = 4(j 2G-3 5 = — 15 10-6
6. h' corr. = 33 8"4 5'= — 15 12"6
Latitude N................... 25° 16'-2
Mean Noon (corr. for Equation of Time) 5h 44m 11s.
In this first' approximation, o is referred to a wrong date, where magnetic
observations were made, but no declination. In the second approximation, the correction
which exactly corresponds to the time of observation has been introduced, so that
the final result is not in the least altered.
Second Approximation.
The equation of time may be considered as constant, during the observations.
The latitude, as obtained from the first approximation, is assumed in round number
= 25° 17' N.
Group I.
Group II.
Time of Obs. by Chron. 3.
Apparent Noon.....
Hour Angle in Time . .
Hour Angle in Arc = t
5 (Sun's Declination) . .
sin 9 sin 8........
cos <p cos 5 cos t . . . .
Sum = sin h . . .
h (True Altitude of the
Sun's Centre) ....
+ Sun's Semidiameter.
Calculated Observation
Direct Observation . . .
5h 40m 22s
5h 27m 53s
5h 52m218
5h 27m 53s
Qh 0m 143
5h 27m 53s
gh 4m 49s
5h 27m 53s
8h gm 30s
5h 27m 53s
8" 11"' 50s
5" 27m53s
0h 12m 29s
3° 7'-3
— 15° 13'-8
— 0-11219
+ 0-87118
0" 24™ 28s
6° 7'-0
— 15° 13'-8
— 0-11219
+ 0-86750
011 32m 21s
8° 5'-3
— 15° 13'-8
— 0-11219
+ 0-86380
0h 36m 56s
9° 14'-0
— 15° 13'-8
— 0-11219
-h 0-86118
2h 38m 378
39° 39'-3
— 15° 15'-5
— 0-11240
+ 0-67163
2i. 43m 57s
40° 59'-3
— 15° 15'-5
— 0-11240
+ 0-65849
0-75899
49° 22'-5
+ 0'-7
O'-l
+ 16'-2
0-75531
49° 3'-2
+ 0'-7
O'-l
-f 16'-2
0-75161
48° 43'-9
+ 0'-7
O'-l
+ 16'.2
0-74899
48° 30'-1
+ 0'-7
— O'-l
+ 16'-2
0-55923
34° 0'-2
+ l'-2
- O'-l
+ 16'-2
0-54609
33° 5'-9
+ l'-2
— O'-l
+ 16'-2
49° 39'-3
49°43'-0
49°20'-0
49° 23'-7
49° 0'-7
49° l'-2
48° 46'-9
48° 49'-8
34° 17'-5
-34° 19'-9
33° 23'-2
33° 25'-8
— 3'-7
i.
- 3'-7
(- 0'-5)
— 2'-9
- 2'-4
— 2'-6
>
Group A (excluding — 0'-5)
Group B.