Analysis of the Terminal Doppler Weather Radar Algorithm for Detecting Rotation Associated with Microbursts

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Abstract:

Rotating winds aloft occurring with downdrafts often are associated with microbursts, which are serious aviation hazards. The Terminal Doppler Weather Radar system detects microbursts and warns pilots of windshear events, partly by its use of rotation as precursors. The role of the rotation region detection algorithm in this system is described, and the improvements to it are analyzed using measured data and simulated rotation regions. The final results show a substantial overall decrease in the number of false detections generated by the algorithm due to adjustment of thresholds and additional logic, while still retaining a good probability of microburst rotation region detection 84 percent. Ideas for future enhancement are explored through techniques such as discriminant analysis and environmental wind filtering.

Author(s):
Coel, Valerie C.
Author Organization(s):
MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
Descriptive Note:
Project rept.,
Supplementary Note:
Original contains color plates: All DTIC and NTIS reproductions will be in black and white.
Pagination:
0071

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
ATC-183, DOT/FAA/NR-91/9
Contract/Grant Number(s):
DTFA-01-89-Z-02033
Monitor Series:
91/9
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_5.2_Understand; JCA_5.2.3_Share Knowledge and Situational Awareness; JCA_6_Net Centric; JCA_1.2.5_Lessons Learned; JCA_1.2_Force Preparation; JCA_1_Force Support; JCA_6.4.1_Secure Information Exchange; JCA_6.2.1_Information Sharing; JCA_6.2.2_Computing Services; JCA_1.2.1_Training; JCA_6.3.3_Spectrum Management; JCA_5.4_Decide; JCA_5.5.2_Task; JCA_5.5_Direct; JCA_6.2_Enterprise Services; JCA_6.4_Information Assurance
Modernization Areas:
AI and Machine Learning
Communities of Interest:
Materials and Manufacturing Processes
Descriptor(s):
*ALGORITHMS, ENVIRONMENTS, DETECTION, HAZARDS, ROTATION, WIND, REGIONS, AERONAUTICS, WIND SHEAR, FILTERS, SIMULATION, PILOTS
Field(s)/Group(s):
Meteorology, Active and Passive Radar Detection and Equipment
Keyword(s):
*WIND SHEAR, *DOPPLER RADAR, *METEOROLOGICAL RADAR, TERMINAL FLIGHT FACILITIES, THRESHOLD EFFECT, ALGORITHMS, TUNING, AVIATION SAFETY, MICROBURSTS, FEATURE EXTRACTION, DISCRIMINATE ANALYSIS, ATMOSPHERIC MOTION, ROTATION
Report Date:
1991 Oct 25