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Boundary Layer Characteristics

When a fluid encounters a solid surface, a boundary layer forms due to the interaction between the fluid's motion and the stationary surface. This phenomenon is characterized by a thin region adjacent to the surface where viscous forces dominate, influencing the fluid's velocity profile. The development of the boundary layer begins at the leading edge of the surface and evolves as the fluid moves downstream.As the fluid flows over the surface, friction between the fluid and the wall slows down...
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Related Experiment Video

Updated: Jul 7, 2026

Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management
08:09

Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management

Published on: September 12, 2017

Airborne Doppler lidar measurements.

J W Bilbro1, C DiMarzio, D Fitzjarrald

  • 1NASA Marshall Space Flight Center, Huntsville, Alabama 35812, USA.

Applied Optics
|November 1, 1986
PubMed
Summary

Recent atmospheric measurements utilized coherent Doppler lidars to analyze wind fields and backscatter coefficients. These findings contribute to understanding atmospheric dynamics using advanced remote sensing technology.

Area of Science:

  • Atmospheric Science
  • Remote Sensing
  • Geophysics

Background:

  • Coherent Doppler lidar technology has advanced significantly since initial test flights.
  • Accurate atmospheric data is crucial for meteorological and climate studies.

Purpose of the Study:

  • To present recent atmospheric measurements using 10.6 micrometer coherent Doppler lidars.
  • To gather data on atmospheric wind fields and backscatter coefficient distribution.
  • To detail instrument modifications and the measurement program.

Main Methods:

  • Deployment of coherent Doppler lidars aboard the NASA Ames Convair 990.
  • Utilizing a 10.6 micrometer wavelength for atmospheric probing.
  • Instrumental modifications based on previous test flight data.

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Last Updated: Jul 7, 2026

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Main Results:

  • Preliminary data on atmospheric wind fields were obtained.
  • The distribution of the backscatter coefficient at 10.6 micrometers was analyzed.
  • Instrument performance and data acquisition capabilities were assessed.

Conclusions:

  • The study successfully demonstrated the utility of modified coherent Doppler lidars for atmospheric research.
  • Preliminary results provide valuable insights into atmospheric wind and backscatter characteristics.
  • Further analysis of the collected data is warranted for comprehensive understanding.