t 
4. 2. 
37 
Flying height: 1200 m. 
Photo-seale: 1 : 12,000. 
Number of plates: 
Strip2-: 11 
Strip3: 9. 
The longitudinal overlap had been fixed at 60%. In some strips, like those of 
group 4, it is more than 60% and reaches 70% in practice. The statoscopic 
registrations can be utilized for groups 2 and 4 and their use has been provided 
for in the tests with these strips. 
Second series of flights on the Vorarlberg polygon. 
During the period of 3-26 October 1955 the Swiss group executed a new series of 
flights, using a plane equipped with a Wild RC 5a camera, f — 210 mm-film and 
a Zeiss RMK 21/18 f — 210 mm, Topar lens size 19 X 19 cm. 
The following flights have been carried out for Commission B; they have been 
executed on the aforementioned strips 2 and 3 of the Vorarlberg polygon. 
Wild RC 5. 
— Strip 2 — Scale of the photographs 1 : 5,000 
Overlap 6096 — Statoscope — Negatives 44 
— Strip 3 — Scale of the photographs 1 : 5,000 
Overlap 6096 — Statoscope — Negatives 46 
— Strip 2 — Scale of the photographs 1 : 10,000 
Overlap 8096 — Statoscope — Negatives 41 
— Strip 3 — Scale of the photographs 1 : 10,000 
Overlap 8096 — Statoscope — Negatives 47 
— Strip 2a — Scale of the photographs 1 : 5,000 
Reserve — Negatives 73 
— Strip 2b — Scale of the photographs 1 : 5,000 
Reserve — Negatives 31 
— Strips 2 4- 3: Scale of the photograps 1 : 10,000 
Reserve — Statoscope — Negatives 88. 
Zeiss RMK 21/18. 
— Strip 2 — Scale of the photographs 1 : 5,000 
Overlap 6096 — Statoscope — Negatives 44 
— Strip 3 -— Scale of the photographs 1 : 5,000 
Overlap 60% — Statoscope — Negatives 46 
— Strip 2 — Scale of the photographs 1 : 10,000 
Overlap 8096 — Statoscope — Negatives 41 
— Strip 3 — Scale of the photographs 1 : 10,000 
Overlap 80% — Statoscope — Negatives 46 
Scale of the photographs 1 : 5,000 
Overlap 60% — Statoscope — Negatives 15 
— Strips 2 + 3: Scale of the photographs 1 : 10,000 
Reserve — Statoscope — Negatives 80. 
— Strip 3a 
  
These flights, which were carried out when the season was already advanced, 
were rendered difficult by fogs, which always occur in autumn in the Rhine 
valley, and by the winds. 
Some anomalies are also observed in the rectilinearity of the strips and in the 
quality of the photographs of which some series had to be overexposed in order 
to obtain interpretable images. 
On the other hand the material collected has not yet been distributed and it