TY - GEN
T1 - Time-delay compensation in data-acquisition process for rotational Raman lidar
AU - Kong, Weiguo
AU - Chen, Siying
AU - Zhang, Yinchao
AU - Ni, Guoqiang
PY - 2009
Y1 - 2009
N2 - Pure Rotational Raman Lidar is a recently developed method for atmospheric temperature detection. Since the Raman-scattering-signals are very weak, the photon-counting method is employed, which could be achieved by using a multiscaler. Time delays, which exist among the trigger channel and the two count channels of the multiscaler, will affect the corresponding relationship between the detected signals and the actual altitudes where the signals are returned, so it is necessary to make some compensation. However, it is difficult to measure the time delays with traditional instruments such as oscillograph, for there is no access to the final internal trigger signal or count signals. In this paper, a measuring system is established, with a Digital Delay/Pulse Generator as the chief component, which is not usually used as a measuring instrument. The measurement precision could reach about 50ps. Meanwhile, the compensating method is also provided to improve the positioning accuracy of the lidar system. 2009 SPIE.
AB - Pure Rotational Raman Lidar is a recently developed method for atmospheric temperature detection. Since the Raman-scattering-signals are very weak, the photon-counting method is employed, which could be achieved by using a multiscaler. Time delays, which exist among the trigger channel and the two count channels of the multiscaler, will affect the corresponding relationship between the detected signals and the actual altitudes where the signals are returned, so it is necessary to make some compensation. However, it is difficult to measure the time delays with traditional instruments such as oscillograph, for there is no access to the final internal trigger signal or count signals. In this paper, a measuring system is established, with a Digital Delay/Pulse Generator as the chief component, which is not usually used as a measuring instrument. The measurement precision could reach about 50ps. Meanwhile, the compensating method is also provided to improve the positioning accuracy of the lidar system. 2009 SPIE.
KW - Delay compensation
KW - Digital Delay/Pulse Generator
KW - Multiscaler
KW - Photon counting
KW - Pure Rotational Raman Lidar
KW - Temperature profile
UR - http://www.scopus.com/inward/record.url?scp=70450215290&partnerID=8YFLogxK
U2 - 10.1117/12.835511
DO - 10.1117/12.835511
M3 - Conference contribution
AN - SCOPUS:70450215290
SN - 9780819476630
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - International Symposium on Photoelectronic Detection and Imaging 2009
T2 - International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging
Y2 - 17 June 2009 through 19 June 2009
ER -