Corten, A Survey Navigation System 
15 
le-of-sight) we use as 
g previous line flight. 
■elative bearing of the 
t to be made good, 
-nadir or gyro-oblique 
formance, showing the 
if accuracy, using the 
s of standard methods 
3n 
o form a logical and 
Leleton on which good 
; of civil aerial survey, 
> of a good flight lay- 
i — even more impor- 
revious paragraphs, is 
1 ¡ne azimuth 
by heading 
1 st I 
lining lin 
TH or RH+D=TCo 
ine : T as basic reference 
adjoining lines: • " as adjustment 
T CO(RB) as adjustment T1<n) as check 
- " " reference - - " check 
'(H) 
MH+VAR =TH, or RH 
t t t 
INPUT: MH VAR or RH D 
Heading ref., rel. or absolute 
RB-TCO(rb) 
D.adj.RBto p R 
i l-o-s 
3 AoV A 
ine of sight 
n-a=tt; N) 
N A or y 
gyronadirand oblique 
Area and line 
limitation 
Area delineation.Line position 
start and stop 
DR procedures and computation 
or: Doppler plus computer 
, Î x 
INPUT: CH VAR D TH TAS WV At 
■V 
Q> 
3 
►TS» 
-< -< 
II “A 
CO |(T, 
II 
II i CO 
4 f < 
p » 
Li 
1 —- oo 
IH 
J 
Is - 
I °- 
I 11 ¿ 
J > ^ 
(/) 
II . 
> * 
Line spacing by 
obliquesighling 
Side lap by 
line spacing 
INPUT: 
Ì-A E, s =0 
A E. s 
f 
(1-w.) Z r tan(/? r +A/?)=A 
fix tifi 
Altitude and 
scale 
Tl + Tg+T n 
n 
t Í t 
= T m 
INPUT: T, T 2 -X 
Pmsl 
Po 
4E 
Cd 
_ r 
. ftel I „ 
lenflügen. Bildmess. u. 
id Durchführung pho- 
25, 1957. 
, Les méthodes de na- 
Comm. I, London 1960. 
mtalnij metod zachoda 
rotom, Trudi Laborat. 
[6] C o r t e n, F. L., Survey navigation and determination of camera orientation elements. 
Photogrammetria, Congress number C, 1959/60. 
[7] Corten, F. L., I.T.C. Survey flight slide rule. I.T.C. Publ. A 30/B 23, 1964. 
\ 
The most important quality of the subject photographed 
which determines exposures and development is its maximum 
and minimum brightness. We have as yet no instrument to 
measure these. In consequence usual procedures are based 
extensively on guess.