Date: 09-18-2006

Observers:  10AM-2 PM, Leona/Viviana
            4:30-6 PM,  WU/Shaheda

Lidar Status: Abnormal signal due to imperfect allignment until 1PM. 
              -New alignment got better signals at 1 PM.

            Change the Cable of Shutter switch by Tom, thereby Lidar was down from
            2:00pm to 4:30pm. 
            
            Recommend to use lidar data starting at 525PM for analyzing aerosol/water vapor.
            Other data can be used to identify the height of aerosol layer, but different
            alignments in AM and PM will have influences on lidar signals of nearst 500m altitudes.                             

              
Allignment/System_Test: 10:00 -  11:00

Laser warm_up: 9:30 - 10:00am


Heavey air traffic and also presence of Airforce 1, more precaution than usual: expect gaps in data
                 
Weather status: 
   Clear Sky with high and mid altitude clouds.
   Aerosol layers clearly appeared between 2 km and 3.5 km altitudes (Fires in western US and canada.
   Shallow PBL with the top around 1.4 km.


Data Start & End time: 10:33 am~06:05pm




    
