In 2013, a serial sky test has been held on 1.8 meter telescope in Yunnan observation site after 2011-2012 Laser guide star photon return test. In this test, the long-pulsed sodium laser and the launch telescope have been upgraded, a smaller and brighter beacon has been observed. During the test, a sodium column density lidar and atmospheric coherence length measurement equipment were working at the same time. The coupling efficiency test result with the sky test layout, data processing, sodium beacon spot size analysis, sodium profile data will be presented in this paper.
A microsecond pulsed sodium has been developed in TIPC laser physics research center, the power of this laser is
around 20W and the length of the pulse is about 120 microseconds. In 2011, an experiment to project the TIPC prototype laser to the sky and measure the photon returns of the laser has been held on the 1.8 meter telescope in Yunnan observation site. During the sky test, an artificial sodium beacon has been successfully generated, and the brightness of the sodium beacon is around 8.7M in V Band. In the 2012 test campaign, the sodium column density facility has mounted on the telescope to test the local sodium density and structure and the sodium density test result is around 2.2x1013/m2.
A multipurpose Lidar was built at Wuhan Institute of Physics & Mathematics, Chinese Academy of Science. The Lidar
consists of an YAG laser pumped dye laser system, two receiving telescopes and several detection channels. During the
past few years, we conducted some lidar observation in various altitudes of the atmosphere at our location. In this paper,
we describe the technical aspects of this multipurpose lidar, and summarize some of the atmosphere observation results
obtained by the lidar over Wuhan, China (31 deg N,114 deg E) with the emphasis on the sodium layer detections.