AUTHORS: 
TITLE: 
DISCUSSION: 
Elassal (USA): 
  
Mussio: 
Ebner: 
  
G. Forlani and L. Mussio (Italy) 
TEST ON JOINT ADJUSIMENT OF GEODETIC AND PHOTO- 
GRAMMETRIC DATA 
This is a comment on the subject of Global Pos- 
itioning System (GPS) which came up during the 
previous Session. I just want to draw attention 
to two presentations which were given at the ASPRS 
meeting last March in Washington - two presenta- 
tions on the dynamic GPS. One presentation which 
was concerned with the performance of GPS in 
dynamic mode. The other experiment was actually 
flying GPS receiver with a camera system. There 
is a very strong feeling in our organization that 
you can obtain accuracy of a sub-meter with GPS 
operating in a dynamic mode. We have actually 
conducted an experiment which showed that an 
accuracy of a decimeter level can be obtained. 
We are planning more tests in the area of utilis- 
ation of dynamic GPS to control photogrammetric 
aerotriangulation. I recommend that if anyone is 
interested in this subject, he might get further 
information by contacting Mr. Jim Lucas of our 
organization. 
The program CALGE and the program GLOBO are now 
for photogrammetric and classical geodetic net- 
works. But there is an open discussion in the 
University of Milan with prof. Sanso, myself and 
other people in Milan to implement also the 
measurement coming from special satellite geodesy 
e.g. Doppler observations or GPS or laser satellite 
etc. The problem is that we have two possibilities. 
The first is to consider the satellite geodesy 
treatment separately and update the input data for 
the general adjustment of correlated coordinates 
of a point. The second possibility is to implement 
also the orbit treatment and the correction of the 
observation for tracks and clock and other prob- 
lems. The construct of integrated program also for 
special satellite geodesy, but now there is not 
enough time to make the decision, to prove the two 
possibilities in making a good, operationally good 
choice. 
It is really very interesting to see what this new 
data will bring to photogrammetry. There is a 
joint meeting next month in Munich. We have 
several papers dealing with the combination of 
this new data and photogrammetry. And we are 
looking forward to learn from these presentations. 
Are there other questions? 
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