SMN Rio Gallegos

(Not available yet. Rainproof, Remote operation: yes)

The lidar will be operated at the abovementioned International Airport by the Argentinean Meteorological Sevice assisted remotely by CEILAP. Other operators may be needed to perform 20/24 measurements. This lidar was conceived to monitor range-resolved (100 m to 13 km AGL) aerosol optical properties from the IR to the near UV spectral region in the whole troposphere. Its emission system is a 10 Hz – 380 mJ (1064 nm) solid state Nd:YAG laser (Continuum – Surelite I–30). The fundamental laser line is doubled and tripled to obtain 532 nm and 355 nm respectively. The backscattered radiation is collected by an f/5, 1 m focal length Newtonian telescope, focused directly to a diaphragm inside the polychromator to achieve a field of view of 1 mrad. The detection unit is a dichroic/interference filter-based polychromator unit that separates the elastic and Raman-shifted backscattered radiation. The detection units are photomultiplier modules (Hamamatsu H10721-03) for the ultraviolet and H10721-20 visible wavelengths and a detector module (LICEL) based on an NIR enhanced Si-avalanche photodiode set (EG&G) for the infrared wavelength.

Rayleigh detection: 1064, 532 ∥, 532 ⊥, and 355 nm Raman detection: 607, 408 and 387 nm (nocturnal measurement only)

Transmitter

• Laser type: Solid stale Nd:YAG laser (Surelite I 30 - Continuum)

• Wavelength: 1064 nm, 532 nm, 355nm

• Pulse energy: 410 mJ @ 1064nm

• Repetition: 30 Hz

• Divergence: 0.5 mrad

• Pulse duration: 4 - 7 nm

• Expander: not used

• FOV: ---

• Rain proof: yes

• Emission: Coaxial

Receiver

• Telescope: 

  • Newtonian

  • Diameter = 20 cm

  • Focal length = 1 m

• Detectors

  • PMT 355o - Hamamatsu H10721-110

  • PMT 355p - Hamamatsu H10721-110

  • PMT 532o - Hamamatsu H10721-20

  • PMT 532p - Hamamatsu H10721-20

  • APD 1064 - LICEL APD 3.0

Data acquisition

• Detection range (approximate): 350 m - 13 km

• Range resolution: 7,5 m

• Elastic channels: Transient recorder. 12 Bit, 20Ms/s. (TR20-12bit-LICEL)

• Elastic channel (only 355 cross ): Transient recorder. 12 Bit, 20Ms/s. (TUSB-0212ADM2-TURTLE )

• Raman channels: ---