FULL GEOMETRICAL SYSTEM CALIBRATION 
AT THE TEST RANGE BRECHERSPITZE 
K.H.Ellenbeck and G.Kupfer 
Institute of Photogrammetry, University of Bonn 
Nussallee 15, D-5300 Bonn 1 
F.R.Germany 
Commission I 
INTRODUCTION 
Metric cameras are mainly delivered by their makers with an 
inspection ‘slip, in which thesdata of, interior;/oriíentation 
originate from laboratory calibration. Real working conditions 
however deviate more or less from a well defined laboratory 
environment. Thus a calibration of the whole system involved 
during a ‘survey flight. iss advisable. This includes camera ‘car- 
rier, among others. 
Several tasks in everyday photogrammetry may be tackled without 
such a procedure. For applications which ask for high precision 
in terrain with larger elevation differences system calibration 
however should be considered as meaningful, both in view of 
accuracy requirements and cost efficiency. 
Some typical tasks of this type are 
* Establishment or densification of precise survey net works, 
also for cadastral purposes; 
* Industrial applications, e.g. supervision of opencasts; 
* Engineering applications, e.g. dam constructions or deforma- 
tion. control. 
This paper aims last but not least at the establishment of 
internationally recognized and agreed at standard procedures 
for a full geometrical system calibration. 
An survey of history and state of the art of camera calibration 
under/ real working conditions was given inaKUPFER 1986. That 
paper also includes a proposal on establishment of the Test 
Range Brecherspitze in the Bavarian Alps and some results of 
simulated calibrations, which demonstrated the feasability of 
the proposed configuration. Anticipated overhead for terrestri- 
al monumentation, targeting and measurements seemed to be reas- 
onable compared with obtainable accuracy of calibrations. Thus 
the test range has been implemented in 1987, and shortly before 
snowfall first calibration flights could be performed. 
Geometrical properties of the range, its configuration and 
first results from calibrations are outlined. Furthermore a 
blueprint of proposed activities and cooperations is given. 
THE TEST RANGE 
Its origin dates from a trigonometrical test net of highest 
accuracy established by the Geodetic Institute of the Technical 
University of Munich (SCHNADELBACH 1981). Its six points showed 
29