PEM-Tropics B LASE IMAGES
General: Gaps in the data may be due to laser eye safety as laser beams may be blocked
in clouds, aircraft turns, or in the vicinity of other aircraft. Aerosol measurements are at a wavelength of 815 nm.
Resolution: A logarithmic color scale is used for all aerosol scattering ratios and a linear color scale is used
for water vapor images (0 - 8 km) and a logarithmic scale for water vapor images (0 - 16 km). The horizontal display
inteval for the summary images (representing the entire flight) are dependent on the length of the flight.
Resolution of LASE Image data are:
VERTICAL RESOLUTION:
Vertical averaging interval
Aerosols 60 meters
Water Vapor
zenith 2010 meters (> 1km range)
990 meters (< 1km range)
Nadir 510 meters
Vertical display interval for averaged data
Aerosols and Water vapor
0 - 8km 30 meters
0 - 16km 60 meters
HORIZONTAL RESOLUTION:
Horizontal averaging interval
Aerosols 6 seconds, or approximately 1400 meters
Water Vapor 180 seconds, or approximately 70 kilometers
Horizontal display interval for averaged data
Aerosols and Water Vapor
Flights 5 - 12 6 seconds, or approximately 1400 meters
Flights 13 - 22 12 seconds, or approximately 2800 meters
Times on the images are Universal Time (UT).
These airborne DIAL data images are to be used as a reference to the digital data to be archived at the NASA Langley DAAC. Please contact either Dr Ed Browell or Dr Syed Ismail at NASA Langley for access to PEM-Tropics B LASE digital data prior to archiving. Images are not to be published without permission from NASA Langley.
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for additional data.
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