- 290 ud 
  
  
  
CONCLUSIONS 
  
Important new developments and instruments are available to survey 
navigation and to airborne sensor orientation. They are available 
now as mass products. 
  
Examples: 
1.1 ERTS/Landsat imagery 
1.2 Programmable pocket calculators and dedicated minicomputers 
1.3 Self-contained precision navisation equipment (e.g. doppler and INS) 
with survey navigation computers which provide for the possibilities 
. direct approach to the survey starting point 
e gap-free coverage of blocks 
. Symnetrical block photography coverage (" symphotblocks") 
». pre-planned and pre-programmed exposure stations ("pin-pointed | 9 
symphotblocks") 
. record — along each aerial photograph's frame — of the actual 
a. Moder 
position (either in longitude and latitude coordinates or in insta 
local grid coordinates) Á 
. record — along each aerial photograph's frame — of the six b.. The u 
elements of outer orientation in terms of n 
— position (X,Y) latitude and longitude coordinates EE 
or local grid c. In re: 
— altitude and/or height (Z) have | 
Quest: 
- verticality («,8 ) A on 
— azimuth (v) northing, heading, drift produc 
. potentially: a continuous digital record of the aircraft's uis 
movements in terms of en 
. speeds dX/dt, dY/dt these 
. rate of climb and descent az/at Test 
. angular speeds, pitch and roll movements des/dt, dp/at 
. azimuth changes d/àt | 
Comparative tests are being carried out to determine the accuracies and 
error models, the operational suitability and usefulness, and the merits 
and de-merits of the new equipment. 
It is expected that results of these tests are available at the ISP congress, 
Hamburg, 1980.