Planck early results
Free Access



Amplitudes vs. time of the four main lines produced by the 4 K cooler on the test resistor signal. Time units are Operation Days (OD), i.e. number of days since launch. (Left) Period when the transponder was switched on once per day for the 3-h Daily Tele-Communication Period. (Right) Later in the mission, when the transponder was always kept on.

This figure is made of several images, please see below:

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