Wildfire Perimeter Tracking via Weather Radar Pyrometeor Detection
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Solution Overview
Problem
Current wildfire tracking methods, relying on satellite and airborne infrared sensors, suffer from temporal and spatial resolution limitations, leading to inadequate real-time monitoring of wildfire progression and spread, which can result in delayed and inaccurate warnings, as seen during the California Camp Fire, where public evacuation decisions were compromised.
Innovation Solution
A radar-based system that utilizes weather radar data to track wildfire progression by identifying local maxima in radar reflectivity, generating updated perimeter estimates, and transmitting them in near real-time to provide timely and accurate information on wildfire location and spread, leveraging fixed and mobile weather radars for high spatial and temporal resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If satellite IR sensors are used for fire detection, then spatial resolution is improved, but temporal resolution deteriorates
Solution Approach 1:
The patent uses weather radar as an intermediary system to detect pyrometeors (ash and debris) lofted by wildfires. The radar provides high temporal resolution (5-minute intervals) while maintaining sufficient spatial resolution (250m range resolution), bridging the gap between satellite IR sensors that offer high spatial resolution but low temporal resolution, and geostationary satellites that offer high temporal resolution but low spatial resolution.
2Loss of time
If geostationary satellite data are used for fire tracking, then temporal resolution is improved, but spatial resolution deteriorates
Solution Approach 1:
Weather radar serves as an intermediary detection system that compensates for the spatial resolution limitations of geostationary satellites. While GOES-16/17 provide 2km pixel resolution, the radar's 250m range resolution and 0.5° azimuthal resolution provide the spatial detail needed for perimeter location while maintaining the 5-minute temporal resolution for real-time tracking.
3Measurement precision
If aircraft IR sensors are used for fire perimeter collection, then spatial resolution is improved, but temporal resolution deteriorates
Solution Approach 1:
The system uses existing weather radar infrastructure that operates continuously for weather monitoring, making it self-service for wildfire detection. The radar automatically detects pyrometeors and provides high-resolution fire perimeter data at 5-minute intervals without requiring dedicated aircraft missions, thereby achieving both high spatial resolution and high temporal resolution.
4Measurement precision
If polar orbiting satellites are used for fire detection, then spatial resolution is improved, but temporal resolution deteriorates
Solution Approach 1:
The weather radar acts as an intermediary system that provides continuous monitoring capability. While polar orbiting satellites like MODIS provide 1km resolution at 4 times daily, the radar provides continuous 5-minute interval observations, eliminating the temporal sampling gap while maintaining sufficient spatial resolution for perimeter tracking.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The radar-based system provides accurate and timely updates on wildfire perimeters and spread, agreeing well with satellite and infrared observations, enabling informed firefighting and evacuation decisions, and overcoming limitations of satellite and aircraft data, such as coarse resolution and interference from smoke and cloud cover.
Implementation Method 1
weather radars quantify the temporal and spatial evolution of 'pyrometeors' (i.e., ash and debris) lofted into the atmosphere by the fire. Thus, radars indirectly measure changes in the fire intensity and location. This capability relies on the radar's sensitivity to pyrometeors suspended in wildfire convective plumes
Implementation Method 2
the radar's sensitivity to pyrometeors suspended in wildfire convective plumes such that the radar reflectivity, Doppler velocity, and dual polarization data quantify plume structure, air flow, and plume composition, respectively. While radar scattering by pyrometeors remains a topic of ongoing research, in general the larger the radar reflectivity the larger the pyrometeor size and/or number concentration
Data Source
AI summary
Methods, systems and apparatus for providing timely and accurate estimates of the location and rate-of-spread of a wildfire. In some embodiments, a processor of a user device receives user defined polygon data estimating a perimeter of a wildfire and generates ellipse data fitting the polygon data. The processor also receives radar reflectivity data via a communication device from at least one weather radar, then determines, based on the radar reflectivity data and the ellipse data, local maxima data and a plurality of fire points, and then generates, based on the plurality of fire points, an updated estimate of the perimeter of the wildfire. In some implementations, the processor of the user device may also transmit the updated estimate of the perimeter of the wildfire to a wildfire update website.