was starting to fail. Since the probe depended on two computers to agree on any decision, the one healthy computer would not be able to control the craft because it could not outvote two bad computers. The craft's high speed transmitter had also developed issues.

Phobos 2 successfully carried out three preliminary encounters with Phobos by using its Videospectrometric Camera, the Combined Radiometer and Photometer for Mars and the Imaging Spectrometer for Mars.

Spacecraft design

Instruments

The Phobos 2 infrared spectrometer

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