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SDSS 2.5-meter Telescope
Axis Encoder Scale Factors

Revised 24-May-00


These are the scale factors for the drive encoders used on the azimuth, altitude, and rotator axes.  

Encoder Scale Factor (asec/ct) Encoder
Model
Encoder 
Type
Interpolator
Type
Interpolator 
Gain
Azimuth 
Encoder #1
0.0140167104063 Heidenhain ROD800 Rotary Heidenhain EXE660 tbd
Altitude 
Encoder #1
0.0140091448584 Heidenhain ROD800 Rotary Heidenhain EXE660 tbd
Rotator 
Read-head #2
0.0213157852666 Heidenhain
LIDA 18C
Optical Tape Heidenhain IBV660 200


 
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