BC-4 System:
Target :
Triangulation Program:
Observational Period:
Source Material:
Lens: Cosmotar c = 450mm Aperture A = 136mm
PAGEOS Satellite, and to some extent ECHO I satellite (both are sunlit
balloon satellites)
World Net
July 1966 - June 1968
930 plates observed on 25 stations.
Images
Precision
of
Setting
Single Camera
Reductions
Assumed Random
Noise of
Star Field
Scintil
lation
Random
Emulsion
Shift
Total
Random
Noise in
System
Polynomial
Curve Fits
0
P
P
P
"of Arc
P
P
"of Arc
Average
Stars
±1.63
±2.97
±0.9(c=450mm)
±2.1
±1.0
±1.0
±3.1
±1.4
Values
Satellite
±1.0
±3.0
—
±2.7
±1.2
±1.0
“ — —
“ — —
Minimum
Stars
±0.86
±1.76
±0.9
±0.25
±0.1*
±1.0
±2.0
±0.9
Values
Satellite
±0.9
±1.4
—
±0.25
±0.1
±1.0
—
—
Maximum
Stars
±2.50
±5.02
±0.9
±4.5
±2.1
±1.0
±5.1
±2.3
Values
Satellite
±1.5
±8.4
—
±8.2
±3 • 8
±1.0
—
—
^computed from formula given by Nettelblad: Scintillation in microns = Vsec z
with K minimum = 0.05; minimum scintillation for moderate zenith distances «±0.25 micron