Wires are heated to 100 deg. Computes wind data by measuring current required to keep wires at reference. 3 degrees and speed up to 150 knots. The other method uses a variable capacitive sensor to compute dewpoint. Both systems use a temperature sensitive resistor to measure ambient temps.
Projector emits a calibrated beam of light to the receiver.
An indicator that is used in conjunction with the GMQ-32's to provide a digital visibility reading. The system computes visibility every minute and displays both current and 10 minute average readouts from 600 to 6000'. Observers can manually select airfield lighting steps as a visibility offset, or the system can be made fully automatic by connecting it to the airfield lighting system and a light intensity detector. Back CT-12K Laser Ceilometer System emits an infrared laser beam straight up into the sky and measures echo return time. Time of echo delay is used to compute lower two cloud layers from 0-12,600' in 50' increments.