Reflections of this light from the base of the clouds are detected by a photocell in the receiver of the ceilometer. |
Earlier, the DWD had already opted for the cloud ceilometer from the Fellbach-based company. |
The rotating-transmitter ceilometer has its separate receiver fixed to direct reflections only from directly overhead while the transmitter sweeps the sky. |
Version 5.2 of the ceilometer algorithm has, in laboratory tests, almost eliminated false reports of this nature. |
Our ceilometer observations of large numbers of birds near crests of ridges are particularly relevant in that regard. |
The ceilometer is designed to produce accurate imagery in varied weather conditions including fog cover and torrential downpours. |