Boundary diffraction waves and the effective size of the inhomogeneities of the scattering object

Bukharin, A. V.

doi:10.3103/s1541308x10010048

Phys. Wave Phen.

2010

DOI: 10.3103/s1541308x10010048

|View full text |Cite

Boundary diffraction waves and the effective size of the inhomogeneities of the scattering object

A. V. Bukharin

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2014

2015

Publication Types

Select...

Article2

Relationship

Self Cite1

Independent1

Authors

Journals

Cited by 2 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By [7], in the absence of a screen in front of the receiving channel, the number of photocounts from a homogeneous illuminated surface will be N 1 . If a screen is present, the number of photocounts will decrease down to pN 1 .…”

mentioning

confidence: 99%

See 1 more Smart Citation

A Method of Determining the Impulse Response Function for an Elastic Scattering Lidar-Nephelometer with Coaxial Sounding Scheme. Part I

2015

Self Cite

View full text Add to dashboard Cite

A coaxial sounding scheme in a pulsed lidar and nephelometer regime used for measurements of the intensity of propagation of a beam within a layer and a given extinction coeffi cient is considered. Measurement of the impulse response function by means of perforated screens is evaluated in the nephelometer regime.Questions of calibration of the existing remote sounding instruments (lidar) in the optical range have still not been resolved. The ultimate goal of calibration of any lidar is the measurement of the base parameters of the scattering medium (atmosphere) [1]. These parameters include the backscatter factor and the extinction coeffi cient. In the course of calibration, it is necessary to measure the signal from a homogeneous atmosphere without attenuation (inpulse response function), the route dependence of the coverage of the visual fi eld with the sounding beam (geometric form factor), the angular dimensions of the visual fi eld and the sounding beam, etc.The problem of the near zone, which is where the angular characteristics of the visual fi eld and the sounding beam associated with the geometry of a partially coherent beam and integration of rapidly oscillating functions are formed, must be solved in the process of measuring the impulse response function. Since information for modeling is often insuffi cient, the impulse response function is measured experimentally in the near zone determined from the route dependence of the signal on the scattering surfaces. During the measurements, the orientation of the surface relative to the sounding beam must not vary along routes upwards of several hundred meters in length. For far distances, edge effects may appear, where a part of the beam passes out of the target plane. The angular scattering diagram, including diffuse and specular components, must be known for calibrated scattering surfaces. Note that, under laboratory conditions, it is possible to detect radiation from foreign objects. In the case of an open-air site, the experiment will depend on atmospheric conditions. Within the near zone, the signal from a scattering surface may exceed by several orders of magnitude the return signal from the atmosphere. This entails the use of attenuators to weaken the energy of the beam by several orders of magnitude. Distortions of the route dependence of the geometric form factor are possible. These and other problems are critical for miniature lidars, since for such lidars practically the entire return signal from the atmosphere is detected in the near zone [2].

show abstract

mentioning

confidence: 99%

“…The values of the corresponding photocounts amounted to N 2 and p g N 2 (p g < p). The transmission p g may be modelled by an increase in the distance to the point source and represented as p(z/z g ) 2 [7]. The transmission p g from a point source may be measured once a dependence p g /p proportional to (z g ) −2 has been found.…”

mentioning

confidence: 99%

A Method of Determining the Impulse Response Function for an Elastic Scattering Lidar-Nephelometer with Coaxial Sounding Scheme. Part I

2015

Self Cite

View full text Add to dashboard Cite

show abstract

Use of Statistically Inhomogeneous Screens in Calibration of Lidar from the Parameters of Images of Particles for the Bottom Layer of the Atmosphere

2014

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Boundary diffraction waves and the effective size of the inhomogeneities of the scattering object

Cited by 2 publications

References 2 publications

A Method of Determining the Impulse Response Function for an Elastic Scattering Lidar-Nephelometer with Coaxial Sounding Scheme. Part I

A Method of Determining the Impulse Response Function for an Elastic Scattering Lidar-Nephelometer with Coaxial Sounding Scheme. Part I

Use of Statistically Inhomogeneous Screens in Calibration of Lidar from the Parameters of Images of Particles for the Bottom Layer of the Atmosphere

Contact Info

Product

Resources

About