tolnet/uah station report – operation, upgrade, and future plan tolnet working group meeting,...
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TOLNet/UAH Station Report – Operation, Upgrade, and Future Plan
TOLNet Working Group Meeting, NOAA/ESRL/CSD, Boulder, COJune 16 15:30, 2015
http://nsstc.uah.edu/atmchem
Shi Kuang1, Mike Newchurch1, John Burris2, Clayton Craft1, David Bowdle1, Guanyu Huang1
1UAHuntsville, 2NASA/GSFC
UAH Robert Cramer Research Hall
TOLNet
Recent Hardware Change
• After 14 May 2013, the dye laser transmitter was upgraded to a Raman-shifted laser transmitter at 289 and 299 nm for its easy installation, robustness, and good conversion efficiency. Correspondingly, the previous 285-291-nm band-pass solar filter was replaced by a 300-nm short-pass filter (for all receivers) accommodating the laser wavelength change.
Transmitter and solar filter
Previous: 532 YAG pumped dye lasers (285-291nm)
Current: 266 YAG pumped Raman-shifted (289-299nm)
266 Pump
High-alt PMT and Narrow-band Filter On 26 August 2014, the Hamamatsu PMTs replaced the EMI PMTs for the 40-cm receiver so that all the PMTs for the lidar were Hamamatsu (either R7400U or R9880U). On 22 October 2014, the narrow band filters at 289 and 299 nm replaced the 300-nm short-pass filter to reduce the daytime solar background to extend the highest daytime measurable altitude to ~12 km.
Hamamatsu R9880
EMI 9813
Receiving Optics
Receiving System for the Scanning O3 Lidar
PMT
PMT
Beam steering unit
299
289
284
8’’ Receiver
10/90 Beamsplitter
Bandpass filter
Licel TR
PD
Function generator
GateTrigger
PMT
Trigger
PMT
Dichroic Beamsplitter
299
284/289
UAH scanning ozone lidar
Vixen telescope (30cm)
Licel
Raman cellPump laser
Function generator
Receiving optics and PMT
Recent Referred Publication
• Wang, L., M. Cook, M. J. Newchurch, K. Pickering, A. Pour-Biazar, S. Kuang, W. Koshak, H. Peterson (2015), Tropospheric ozone lidar data evaluation of the lightning-induced ozone enhancement simulated by the WRF/Chem model, Atmospheric Environment, 115, 185-191, doi:10.1016/j.atmosenv.2015.05.054.
• Huang, G., M. J. Newchurch, S. Kuang, P. I. Buckley, W. Cantrell, and L. Wang (2015), Definition and determination of ozone laminae using Continuous Wavelet Transform (CWT) analysis, Atmospheric Environment, 104, 125-131, doi:10.1016/j.atmosenv.2014.12.027.
Year 2008 2009 2010 2011 2012 2013 2014
Days 27 40 55 46 38 57 41
UAH O3 lidar webpagehttp://nsstc.uah.edu/atmchem/lidar/DIAL_data.html
Data StatusTotal operational days
May 2-3, 2014
Funding Sources
• Major: NASA HQ TOLNet program for routine operation and scientific study
• Minor: 2014-2015 UAH Research Infrastructure Fund Program for truck and box modification
• Minor: 2014-2015 UAH Individual Investigator Distinguished Research (IIDR) Program for mobile system development
Planned Mobile Lab
Figure 1. Planned UAH mobile air-quality laboratory for simultaneous ozone and aerosol profiling. This mobile platform will include accommodations for a scanning ozone lidar with two telescopes for measuring different altitudes, an aerosol lidar, an ozonesonde station, and a surface air-pollutant measurement complement.
YAGYAG
Signal processing
In situ measurement kit O3, NO2, NO, CO, SO2
Aerosol Lidar
YAG
Ozonesonde station
Scanner532/1064 nm
289/299 nm
Ozone Lidar
Ozone lidar telescope (large)