CE370

CE370 - LiDAR

CE370 – Long Range Automatic Aerosol LiDAR

The CE370 LiDAR provides continuous & real-time operation with high performance measurements of aerosols and clouds including the vertical distribution with an extended range (up to 25 km).

It features a large aperture (200 mm diameter) for enhanced measurement up to high altitudes while ensuring full compliance with eye safety rules.

A second telescope can be added to extend the measuring range towards very low altitudes (from 50 m).

It can be operated in fixed mode (indoor or outdoor with enclosure) within an observation network, or during punctual campaigns (fixed or even on a mobile vehicle).

 

Key Benefits

  • Aerosol measurements up to 25 km
  • Very short blind zone (< 50 m) with an overlap from 5 km
  • Real-time “quicklook” visualization
  • Automatic extinction and backscattering profiles (with AOD or LR)
  • High stability and low maintenance
  • Eye-safety compliance with EN-60825/ANSI Z136
  • Easy transportation : Outdoor / indoor / mobile operation

Package contents

  • 1 long range automatic aerosol LiDAR CE370
  • 1 License of LiDAR control software (LiDAR 2) on a USB key
  • 1 user manual

Note 1: To be powered by mains.

Note 2: The telescope must be kept between +20°C and +30°C and may be installed within a thermal enclosure (not included).

Related solutions

Source

Laser type Frequency doubled Nd:YAG
Wavelength 532 nm
Pulse energy 10-20 µJ (option 30 µJ)
Repetition rate 5 kHz
Pulse width < 15 ns

Optics

External fiber optics length 10 m (30 m in option)
Main optical head type 15 m RS232 cord
RS232 – USB converter
Main optical head aperture diameter 200 mm
Main optical head effective focal length 900 mm
Field stop Double
Total beam divergence Emission: 55 µrad
Reception : 55/ µrad (900 µrad for low range )
Beam configuration Mono-axis. Bi-axis for low range
Eye safety Yes (except for 30 µJ option)

Detection

Detector type APD QE 55%.
Filter bandwidths (3) 0.2 – 2 – 10 nm

Power supply

Voltage and power 100/115/230 V AC , 28 V DC in option, < 100W

Data acquisition

Data acquisition mode Photon counting.
Continuous acquisition Yes, automatic
Data counting rate 25 Mc/s
Electronic range resolution 15 m gates
Electronic range From 50 m up to 30 km (2048 gates).
Data transfer to PC USB

Measurement range **

Molecular detection range in typical conditions (AOD 0.2) with 10 min averaging

By night time: 24 km

By day time: 15 km

Retrieved products

PR2 / Ln(PR²) data (after instrumental corrections) Yes
Stratification analysis Yes: aerosols, boundary layers, clouds
Extinction & backscatter coefficients Yes (with additional data : AOD or LiDAR Ratio)

Environmental conditions

Operation temperature +20°C to +30°C
Humidity 0-100%

General

System transportability Yes
Optical head dimensions Diameter 200 mm x 1300 mm
Control unit dimensions L:700 mm x W 200 mm x H 400 mm
System weight 30 kg

Option

Thermal enclosure -40°C to +50°C

** Measurement range
The detection range of a high altitude layer of particles (aerosols or cloud) strongly depends on its concentration.
The more concentrated the layer, the farther its detection.
Therefore, to define the performance of a LiDAR in terms of measurement range, it is usual to rather refer to the Molecular Detection Range: the distance (in the absence of clouds) up to which the LiDAR is able to measure the tiniest “molecular” signal from an aerosol free atmosphere (with a Signal to Noise Ratio superior to 1). This Molecular Detection Range only depends on measurement conditions (total aerosol loading, averaging time, night/day).
For any given measurement condition, the LiDAR will detect particle layers above the corresponding Molecular Detection Range, the maximal height depending on layer’s concentration.

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