原文传递
Clutter filter design considerations for Airborne Doppler radar detection of windshear
| 题名： | Clutter filter design considerations for Airborne Doppler radar detection of windshear |
| 作者： | Baxa, Ernest G., Jr. |
| 关键词： | filter；doppler；detection；design；radar；inds；side；processing；cons；clut |
| 摘要： | The problem of clutter rejection when processing down-looking Doppler radar returns from a low altitude airborne platform is a paramount problem. With radar as a remote sensor for detecting and predicting windshear in the vicinity of an urban airport, dynamic range requirements can exceed 50 dB because of high clutter to signal ratios. This presentation describes signal processing considerations in the presence of distributed and/or discrete clutter interference. Previous analyses have considered conventional range cell processing of radar returns from a rigidly mounted radar platform using either the Fourier or the pulse-pair method to estimate average windspeed and windspeed variation within a cell. Clutter rejection has been based largely upon analyzing a particular environment in the vicinity of the radar and employing a variety of techniques to reduce interference effects including notch filtering, Fourier domain line editing, and use of clutter maps. For the airborne environment the clutter characteristics may be somewhat different. Conventional clutter rejection methods may have to be changed and new methods will probably be required to provide useful signal to noise ratios. Various considerations are described. A major thrust has been to evaluate the effect of clutter rejection filtering upon the ability to derive useful information from the post-filter radar data. This analysis software is briefly described. Finally, some ideas for future analysis are considered including the use of adaptive filtering for clutter rejection and the estimation of windspeed spatial gradient directly from radar returns as a means of reducing the effects of clutter on the determination of a windshear hazard. |
| 报告类型： | 科技报告 |
相关文献
- Airborne Doppler radar detection of low altitude windshear
- Investigation of airborne lidar for avoidance of windshear hazards
- Cockpit display of hazardous wind shear information
- Ground clutter measurements using the NASA airborne doppler radar: Description of clutter at the Denver and Philadelphia airports
- Airborne derivation of microburst alerts from ground-based Terminal Doppler Weather Radar information A flight evaluation
- Acquisition and use of Orlando, Florida and Continental Airbus radar flight test data
检索历史
应用推荐
