TITLE:
Landsat-8 Satellite and Plan Position Indicator Lidar Observations for Retrieving Aerosol Optical Properties in the Lower Troposphere
AUTHORS:
Jamrud Aminuddin, Babag Purbantoro, Nofel Lagrosas, Naohiro Manago, Hiroaki Kuze
KEYWORDS:
PPI Lidar, Mie Scattering, Fernald Analysis, Landsat-8, MODTRAN
JOURNAL NAME:
Advances in Remote Sensing,
Vol.7 No.3,
September
11,
2018
ABSTRACT: Observation of optical properties of atmospheric aerosols, especially
their behavior near the surface level, is indispensable for better understanding
of atmospheric environmental conditions. Concurrent observations of ground-based instruments and satellite-borne sensors are useful for
attaining improved accuracy in the observation of relatively wide area. In the
present paper, aerosol parameters in the lower troposphere are monitored using
a plan position indicator (PPI) lidar, ground-sampling instruments (a nephelometer,
an aethalometer, and optical particle counters), as well as a sunphotometer.
The purpose of these observations is to retrieve the aerosol extinction
coefficient (AEC) and aerosol optical thickness (AOT) simultaneously at the
overpass time of Landsat-8 satellite. The PPI lidar, operated at 349 nm,
provides nearly horizontal distribution of AEC in the lower part of the atmospheric
boundary layer. For solving the lidar equation, the boundary condition and lidar
ratio are determined from the data of ground sampling instruments. The value of
AOT, on the other hand, is derived from sunphotometer, and used to analyze the
visible band imagery of Landsat-8 satellite. The radiative transfer calculation
is conducted using the MODTRAN code with the original aerosol type that has
been determined from the ground sampling data coupled with the Mie scattering
calculation. Reasonable agreement is found between the spatial distribution of
AEC from the PPI lidar and that of AOT from the blue band (band 2) of
Landsat-8. The influence of AOT on the values of apparent surface reflectance
is also discussed.