• Corpus ID: 8741323

APL environmental assessment for Navy anti-air warfare

  title={APL environmental assessment for Navy anti-air warfare},
  author={J. Ross Rottier and John R. Rowland and Gerald C. Konstanzer and Julius Goldhirsh and George D. Dockery},
  journal={Johns Hopkins Apl Technical Digest},
The role of the cce in environment in defense of U.S. Navy ships is amplified when they operate in coastal regions. To address this, APL has developed a unique capability to characterize critical aspects of the ocean environment, particularly those that impact Navy shipboard combat systems through their effects on microwave and infrared propagation. APL produces analysis techniques, instrumentation, models, simulations, and tactical decision aids that support a surface ship's defense against… 
Surface-based ducting due to a shift in air masses off the coast of Wallops Island, Virginia
On 14 November 2007, the Johns Hopkins University Applied Physics Laboratory (JHU/APL) provided environmental characterization support for a US Navy radar test event, off the coast of Wallops Island,
Design of a Beyond-Line-of-Sight Microwave Propagation Study Across the Gulf of Mexico
A propagation study project is underway that will investigate using this evaporative duct to create a 500-mile microwave link, across the Gulf of Mexico, between Key West and Destin, Florida, which could potentially create an opportunity to introduce redundancy for both vulnerable geographic regions at the same time.
Refraction effects of atmospheric inhomogeneities along the path
A critical moment in the detection process of incoming targets at sea occurs, when a target just appears above the horizon. The corresponding light rays cross the atmospheric boundary layer, in which
EOSTAR: an electro-optical sensor performance model for predicting atmospheric refraction, turbulence, and transmission in the marine surface layer
A first version of the integrated model EOSTAR (Electro-Optical Signal Transmission and Ranging) to predict the performance of electro-optical (EO) sensor systems in the marine atmospheric surface


Development and Use of Electromagnetic Parabolic Equation Propagation Models for U.S. Navy Applications
T he U.S. Navy has been developing models to describe and predict electromagnetic propagation in the lower atmosphere for many years, and these models have been used in conjunction with system
Specification for Environmental Measurements to Assess Radar Sensors
Abstract : The purpose of this document is to prescribe the minimum requirements for measuring environmental parameters that affect the evaluation of proposed radar systems. These environmental
Influence of coupled environmental features on propagation characteristics for an RF and IR multisensor radar system
We address the question, Given a multifrequency system comprising an RF radar and an IR sensor, what is the probability of “good multisensor propagation”? We define good multisensor propagation as
An analysis of EMPE code performance in a selection of laterally inhomogeneous atmospheric-duct environments
Articles in an earlier issue of this publication introduced the methodology for APL's Electromagnetic Parabolic Equation (EMPE) code, discussed the code's advantages over other models, and showed its
Fine-scale measurements of microwave refractivity profiles with helicopter and low-cost rocket probes
The recent development of computer models that can accurately predict radar performance under ducting or other anomalous propagation conditions has produced a need for high-resolution profiles of
Propagation measurements and modeling at C band for over‐the‐water, line‐of‐sight propagation links in the Mid‐Atlantic coast
Fade, radar, and propagation modeling results are described for two nearby over-the-water, line-of-sight, propagation links operating at 4.7 GHz in the Mid-Atlantic coast of the United States. During
State and Limits of Prediction Methods of Radar Wave Propagation Conditions Over Sea
The vertical stratification of the refractive index immediately over sea may be interpreted on the basis of the theory of the atmospheric boundary-layer turbulence. Detailed experimental
Three years of C band signal measurements for overwater, line‐of‐sight links in the mid‐Atlantic coast: 2. Meteorological aspects of sustained deep fades
The morphology of deep and long-lived fades for line-of-sight, overwater propagation links in the mid-Atlantic coast are examined. Such events, known as sustained deep fades (SDF), are analyzed
Observation of a strong surface radar duct using helicopter acquired fine-scale radio refractivity measurements
A very strong surface duct was observed near San Nicolas Island, California, using a unique helicopter-based data acquisition system developed for making fine-scale measurements of radio refractivity
Signal level statistics and case studies for an over‐the‐horizon mid‐Atlantic coastal link operating at C‐band
We examine the results of 1 year of near‐continuous measurements for a 128‐km over‐the‐horizon C‐band coastal propagation link. The link extends between Dam Neck, Virginia (16 km south of Virginia