Autonomous Satellite Debris Avoidance Using Onboard Radar
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current satellite systems rely on ground stations for debris avoidance, which are limited by atmospheric attenuation, non-continuous coverage, and high costs, making it difficult to detect and avoid small, rapidly moving debris in time, especially since replacement satellites take years to produce and launch.
Innovation Solution
An autonomous satellite system equipped with onboard debris tracking using microwave or LADAR sensors, combined with onboard computers to calculate collision risks and adjust orbits, eliminating the need for ground station intervention and enabling faster reaction times to potential collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ground stations are used for debris tracking and avoidance commands, then satellite operators can receive debris location information, but the system suffers from atmospheric attenuation, non-continuous coverage, and delayed response time
Solution Approach 1:
Instead of having ground stations track debris and send commands to satellites, the patent inverts the architecture by placing radar sensors and processing equipment directly on the satellite. This allows the satellite to autonomously detect, track, and respond to debris threats without relying on ground-based infrastructure, eliminating atmospheric interference and communication delays.
Solution Approach 2:
The satellite becomes self-sufficient in debris avoidance by incorporating its own radar sensor, processor, and propulsion control. The satellite independently performs all functions from debris detection through collision risk assessment to orbital adjustment, without requiring external ground station assistance for the critical avoidance response.
2Area of stationary object
If multiple ground stations are deployed to achieve continuous coverage, then debris tracking coverage improves, but capital and operational costs increase significantly
Solution Approach 1:
The patent shifts the tracking capability from the ground to space, placing the radar sensor on the satellite itself. This eliminates the need for a network of ground stations and their associated infrastructure, while the satellite's orbital motion naturally provides comprehensive coverage of the debris environment.
Solution Approach 2:
The satellite's radar sensor serves multiple functions: it tracks orbital debris, determines collision risk, calculates avoidance maneuvers, and controls the propulsion system. This multi-functionality consolidates what would otherwise require separate ground-based systems into a single space-based platform.
3Measurement precision
If ground-based radar systems are used, then debris tracking can be performed, but atmospheric interference reduces detection accuracy for small and fast-moving debris
Solution Approach 1:
By moving the radar sensor from the ground to space, the patent eliminates the atmosphere as an interfering medium. The satellite-based radar operates in the vacuum of space, providing unobstructed detection of small, fast-moving debris without atmospheric attenuation or ionospheric errors.
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 autonomous system effectively detects and avoids orbital debris with higher accuracy and speed, reducing the risk of collisions and minimizing operational and economic losses by utilizing existing satellite computing power and propulsion systems, thus providing continuous and efficient debris avoidance without relying on ground stations.
Implementation Method 1
an orbital debris tracking subsystem to detect and track objects using a microwave or light (LADAR) frequency radar or similar sensors/detectors
Implementation Method 2
an orbital debris tracking subsystem to detect and track objects using a microwave or light (LADAR) frequency radar or similar sensors/detectors
Implementation Method 3
the satellite has sufficient propulsion capability to adjust its orbit
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An autonomous system for a satellite which calculates collision paths of debris from anywhere within the spheroid around the satellite by using its radar/ladar data and from data on its own orbit derived by onboard sensors such as star, earth and sun sensors or from stored data sent from its ground control station through the satellite's command subsystem. If a collision would be likely, the system calculates the minimum change in the satellite's orbit to avoid such collision and generates and executes commands for firing on-board orbital control thrusters to put the satellite in a suitable avoidance orbit.