Description: | The instrument produced a significant number of optical cross-talk warnings and displayed
a reduced capacity to detect high clouds. The internal cables were inspected, the
compensation fiber and optics monitor were replaced, the crosstalk compensation was adjusted,
and the system tested with an optical termination hood, all with no improvement. While
waiting for a new receiver board, receiver ribbon cable, and compensation fiber cable from
Vaisala, a spare ceilometer with a standard, "non-tropics", window was installed. |