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Table 1 Major specifications of lidar systems at PRL and NARL

From: Study of thermal structure differences from coordinated lidar observations over Mt. Abu (24.5° N, 72.7° E) and Gadanki (13.5° N, 79.2° E)

Specifications

Lidar-PRL

Lidar-NARL

Transmitter

  

 Laser source

Nd:YAG

Nd:YAG

 Model

581C-10 (Quantal, France)

PL8020 (Continuum, USA)

 Operating wavelength (nm)

1064, 532, and 355

532

 Average energy per pulse (mJ)

1000, 440, and 180

550

 Pulse width (ns)

7

7

 Pulse repetition frequency (Hz)

10

20

 Beam width (mm)

10 (expanded to 60)

9 (expanded to 90)

 Beam divergence (mRad)

0.3

0.45

Receiver

  

 Telescope type

Cassegrain

Newtonian

 Diameter (mm)

900

750

 Field of view (mRad)

6

1

 Interference filter (nm)

1

1.07

 Maximum transmission

48 %

48 %

Photomultiplier tube

  

 Model

Thorn EMI, UK, A9813

Hamamatsu, Japan, R3234-01

Data acquisition

  

 Software

SR430 (Stanford Research Systems), USA: Programmable

Four-channel PC-based data acquisition system operating with EG & G ORTEC MCS software

 Bin width (μs)

640 × 10−3

2

 Scan length

1024

1024

 Integration time (s)

600 (for 6000 shots)

250 (for 5000 shots)