Instruments
Mariner 10 instruments included:
- Twin telescope/cameras with digital tape recorder
- Ultraviolet spectrometer
- Infrared radiometer
- Solar plasma
- Charged particles
- Magnetic fields
- Radio occultation
- Celestial mechanics
The imaging system, the Television Photography Experiment, consisted of two 15 cm (5.9″) Cassegrain telescopes feeding vidicon tubes. The main telescope could be bypassed to a smaller wide angle optic, but using the same tube. It had a 8-position filter wheel, with one position occupied by a mirror for the wide-angle bypass. The system returned about 7000 photographs of Mercury and Venus during Mariner 10's flybys.
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