Atmospheric Remote Sensing: Instruments

Airborne Excimer Ozone Differential Absorption Lidar (ABDIAL)

ABDIAL lidar instrument photo

ABDIAL installed on DC-3 aircraft.


Introduction to Differential Absorption Lidar (DIAL) techniques.

Research applications include:

  • Airborne mapping of lower tropospheric ozone and aerosol distributions
  • Air pollutant plume and air mass dispersion studies
  • Ozone non-attainment studies

Contact: Christoph Senff

Basic Parameters Measured

  • Ozone concentration profiles
  • Aerosol backscatter

Field Projects

Project NameDateLocation
NEAQS2New England Air Quality Study (NEAQS) 2004200406June-August 2004 New Hampshire
NEAQSNew England Air Quality Study (NEAQS)200207July-August 2002 New Hampshire
TexAQSTexAQS (Texas Air Quality Study)200008August-September 2000Houston, Texas
SOS99Southern Oxidants Study (SOS) 991999June-July 1999Tennessee Valley
SOS95Southern Oxidants Study (SOS)1995July 1995Tennessee Valley

Typical Specifications

Wavelengths277, 292, 313, 319, 360 nm
Pulse energy5 - 15 mJ / wavelength
Pulse rate20 Hz
ScanFixed, down-looking from an airborne platform
Resolution90 m (ozone)15 m (aerosol backscatter)
Minimum range0.7 km
Maximum range3.5 km
AccuracyLess than 10 ppbv typical
PlatformCasa 212 cargo aircraft
Laser TypeKrypton Fluoride with Raman shifting in H2 and D2
Receiver50 cm diameter Newtonian telescope (down-looking)
DetectorsHamamatsu R2055 and R2076 PMT's, gated
A-to-D convertersDSP 12-bit 5 MS/s (ozone), 10 MS/s


Alvarez II, R.J., R.M. Hardesty, C.J. Senff, D.D. Parrish, W.T. Luke, T.B. Watson, and P. H. Daum, Intercomparison between in situ and lidar measurements of ozone during the 1995 Southern Oxidants Study, AGU Fall Meeting, F96, San Francisco, California, 15-19 December 1996.