Analyzing the Effects of Meteorology on Radar Measured Index of Refraction Structure Parameter PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Analyzing the Effects of Meteorology on Radar Measured Index of Refraction Structure Parameter PDF full book. Access full book title Analyzing the Effects of Meteorology on Radar Measured Index of Refraction Structure Parameter by Jeffrey W. Budai. Download full books in PDF and EPUB format.
Author: Jeffrey W. Budai
Publisher:
ISBN: 9781423528173
Category : Atmospheric turbulence
Languages : en
Pages : 115
Get Book Here
Book Description
Forecasting optical turbulence is essential for the Air Force's Airborne Laser program to optimize placement of aircraft. To find bow meteorology affects C(sub n)(sup 2), the intensity of turbulence in the index of refraction, case studies of synoptically interesting times are first chosen. Correlation coefficients are then computed between radar measured C(sub n)(2) and meteorological quantities. The potential for mechanically turbulent activity is looked at. In the analysis of this work, six meteorological features were found likely to affect C(sub n((sup 2). Two features associated with affecting potential refractivity, and thus C(sub n)(sup 2), are jets and inversions. North of jet core level in the northern hemisphere, higher values of C(sub n)(sup 2) can be found north of the core, with lower values to the south. With temperature inversions, typically higher values of can be found just above inversions with comparatively lower C(sub n)(sup 2) values underneath. The remaining four features affecting C(sub n)(sup 2) are not directly related to potential refractivity alone. The first is bands of high C(sub n)(sup 2) occurring within regions of strong vertical wind shear. The second feature is high C(sub n)(sup 2) occasionally seen underneath inversions during the approach of jets that are associated with gravity wave activity. The other two meteorological features are tropopause boundaries and trough passage.
Author: Jeffrey W. Budai
Publisher:
ISBN: 9781423528173
Category : Atmospheric turbulence
Languages : en
Pages : 115
Get Book Here
Book Description
Forecasting optical turbulence is essential for the Air Force's Airborne Laser program to optimize placement of aircraft. To find bow meteorology affects C(sub n)(sup 2), the intensity of turbulence in the index of refraction, case studies of synoptically interesting times are first chosen. Correlation coefficients are then computed between radar measured C(sub n)(2) and meteorological quantities. The potential for mechanically turbulent activity is looked at. In the analysis of this work, six meteorological features were found likely to affect C(sub n((sup 2). Two features associated with affecting potential refractivity, and thus C(sub n)(sup 2), are jets and inversions. North of jet core level in the northern hemisphere, higher values of C(sub n)(sup 2) can be found north of the core, with lower values to the south. With temperature inversions, typically higher values of can be found just above inversions with comparatively lower C(sub n)(sup 2) values underneath. The remaining four features affecting C(sub n)(sup 2) are not directly related to potential refractivity alone. The first is bands of high C(sub n)(sup 2) occurring within regions of strong vertical wind shear. The second feature is high C(sub n)(sup 2) occasionally seen underneath inversions during the approach of jets that are associated with gravity wave activity. The other two meteorological features are tropopause boundaries and trough passage.
Author: Bradford R. Bean
Publisher:
ISBN:
Category : Radio meteorology
Languages : en
Pages : 456
Get Book Here
Book Description
Author: O. A. Mozzhukhin
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Get Book Here
Book Description
The basic source of errors in high frequency radar measurements due to meteorological factors is identification of the refraction index n sub av obtained as the average value of measurements made at the end of the line with its true value n, which is characteristic for the entire measured line at the level of radio beam transmission. The error depends first on the value of the vertical gradient of the refraction index within the layer of atmosphere where the radio waves are propagated during radio geodetic measurements. If the law is known for the variation in the refraction index with altitude and the average height of radio beam h over the base surface (for example, by taking measurements from a topographical chart); an attempt can be made to reduce the index of refraction measured close to the surface of the Earth to the altitude h and thereby to correct the measured radar distance. To clarify the question of variation in the refraction index with altitude, experimental data on the temperature and humidity of air at four altitudes in a layer extending to 106 m over an open, level region were processed.
Author: United States. Naval Weather Service Command
Publisher:
ISBN:
Category : Atmospheric radio refractivity
Languages : en
Pages : 38
Get Book Here
Book Description
Author: Andreas Kasimir Goroch
Publisher:
ISBN:
Category : Atmosphere
Languages : en
Pages : 31
Get Book Here
Book Description
The Monterey Bay turbulence model verification experiment was conducted to verify correlation models of bulk meteorological and optical turbulence. Cf. Report Documentation Page.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 380
Get Book Here
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
Defining the averaging time required for measuring meaningful turbulence statistics is a central problem in boundary-layer meteorology. Path-averaging scintillation instruments are presumed to confer some time-averaging benefits when the objective is to measure surface fluxes, but that hypothesis has not been tested definitively. This study uses scintillometer measurements of the inner scale of turbulence l(sub 0) and the refractive index structure parameter (C(sup, sub n)) collected during SHEBA (the experiment to study the Surface Heat Budget of the Arctic Ocean) to investigate this question of required averaging time. The first conclusion is that the beta probability distribution is useful for representing; C(sup 2, sub n) and l(sub 0) measurements. Consequently, beta distributions are used to set confidence limits on C(sup 2, sub n) and l(sub 0) values obtained over various averaging periods. When the C(sup 2, sub n) and l(sub 0) time series are stationary, a short-term average of C(sup 2, sub n) or l (sub 0) can be as accurate as a long-term average. But, as with point measurements, when time series of path- averaged C(sup 2, sub n) or l (sub 0) values are nonstationary, turbulent surface fluxes inferred from these C(sup 2, sub n) and l (sub 0) values can be variable and uncertain-problems that path-averaging was presumed to mitigate. Since nonstationarty turns out to be a limiting condition, the last topic is quantifying the nonstationarty with a published nonstationarty ratio and also by simply counting zero-crossings in the time series.
Author: G. A. Clift
Publisher: World Meteorological Organization
ISBN:
Category : Radar meteorology
Languages : en
Pages : 110
Get Book Here
Book Description
Author: Kenneth R. Hardy
Publisher:
ISBN:
Category : Atmosphere
Languages : en
Pages : 20
Get Book Here
Book Description
Author: H. Jeske
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 492
Get Book Here
Book Description
Proceedings of the NATO Advanced Study Institute, Goslar, Harz, Germany, September 22-October 3, 1975
