Table of Contents
Vaisala CT25K Ceilometer
History
Specifications
See manual section 1.2.6 page 8 and section 5.2.2 page 56.
| Parameter | Specification |
|---|---|
| Wavelength | 905 nm |
| Pulse Power | 16 W typical |
| Pulse energy | 1.6μJ ±20%1) |
| Average Power | 8.9 mW |
| Pulse Width | 100 ns |
| Pulse Repetition Rate (PRR): | 5.57 kHz |
| Number of pulses (PQTY): | 65,5362) |
| Averaging time: | 11.7sec (=PQTY/PRR) |
| Time resolution | 15sec 3) |
| Range resolution | 50ft = 30m |
| Range | 200…25,000 ft. (60…7500 m) |
| Laser Divergence | ± 0.53×0.75 mrad (edge×diagonal4)) |
| Field-of-View Divergence | ± 0.66 mrad |
| Telescope diameter | 145mm |
| Tilting angle | 2.5° as of Aug 21 2015 (7° before…) |
| Size | 760 x 280 x 245 mm |
| Power Consumption | 365 W |
| Weight | 40 kg |
| Manufacturer | Vaisala |
1)
factory adjustment
2)
65,536=2^16=64*1024=4^(7+1) the 7 contained in the last is what you find in the status message
3)
⇒ 3.3sec for processing and data transmission
4)
the laser is a diode with square shape. The beam thus a pyramid with different opening angles for neighbouring and opposite edges