LEO Satellite Constellation for Ballistic Missile Detection
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Solution Overview
Problem
Current systems for detecting and tracking ballistic missiles and space objects in low Earth orbit face challenges such as long detection times, high costs, and the need for numerous satellites due to limited viewing areas and increased sensor complexity, especially when distinguishing objects from natural radiation backgrounds.
Innovation Solution
A constellation of satellites in equatorial and polar orbits with sensors capable of detecting thermal radiation and flight paths, allowing for early warning and tracking of missiles and space objects using tangential surveillance geometry, reducing the number of satellites required and simplifying sensor design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If ground-based radar systems or telescopes are used for detecting satellites and space objects, then detection capability is provided, but detection time increases to days due to satellite flight path limitations
Solution Approach 1:
The patent transitions from ground-based detection to space-based detection by deploying satellites in Low Earth Orbit (LEO). This dimensional change from Earth surface to orbital space allows satellites to detect objects in their vicinity continuously, reducing detection time from days to minutes while maintaining high reliability through proximity-based observation.
2Reliability
If optical telescopes are used for detection, then detection capability is provided, but external circumstances such as darkness or poor weather prevent or substantially impair detection
Solution Approach 1:
The patent replaces passive optical telescopes with active radar systems on board LEO satellites. Radar systems emit electromagnetic waves and detect reflections, enabling detection independent of ambient light conditions. This substitution eliminates the harmful effects of darkness and poor weather that limit optical telescope operation.
3Stability of the object's composition
If geostationary satellites are used for early warning, then fixed geometric conditions are achieved, but distance from target area increases sensor complexity and requires large space transport carriers
Solution Approach 1:
The patent changes the orbital parameter from geostationary orbit (GEO) to Low Earth Orbit (LEO). This parameter change reduces the distance to target objects from approximately 36,000 km to a few hundred kilometers, thereby reducing sensor complexity and allowing the use of smaller, more cost-effective satellites while maintaining stable geometric conditions through constellation configuration.
4Device complexity
If LEO satellites are used for surveillance, then distance to object decreases enabling cost-effective satellites, but surveillance area and field of view are limited
Solution Approach 1:
The patent divides the surveillance task among multiple LEO satellites configured in a constellation. Each satellite covers a limited field of view, but the collective constellation achieves global or regional coverage. This segmentation allows the use of simple, cost-effective individual satellites while achieving comprehensive surveillance area through coordinated operation.
5Area of stationary object
If more than 20 or 30 LEO satellites are used for global surveillance, then coverage capability is achieved, but system cost and complexity increase significantly
Solution Approach 1:
The patent designs LEO satellites with multi-functional capabilities, including radar detection, optical detection, and tracking functions. Each satellite can perform multiple detection tasks and adapt to different surveillance requirements. This universality reduces the total number of satellites needed compared to specialized single-function systems, achieving global coverage with a more cost-effective constellation.
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
Enables rapid detection and tracking of ballistic missiles and space objects with a small number of satellites, reducing costs and false alarms, and allowing for continuous surveillance with a high signal-to-noise ratio, while maintaining a global surveillance capability with minimal data transmission and processing.
Implementation Method 1
A constellation of satellites in equatorial and polar orbits with sensors capable of detecting thermal radiation and flight paths
Data Source
AI summary
The invention relates to a method, a satellite, and a system or an arrangement with at least one satellite for detecting flying objects that are located in the vicinity of a planet, planetoid or similar celestial bodies. The invention further relates to the use thereof for carrying out said method and particularly to a constellation of LEO satellites (LEO=Low Earth Orbit) as an early warning of ballistic missiles, wherein said constellation comprises only satellites on equatorial orbits or orbits with low inclination. Satellite constellations in the low earth orbit (LEO) for missile detection are used for early warning of ballistic missiles, either by detecting the combustion phase of the flying object or by detection during the free-flight phase. The viewing direction of the sensors can be directed directly toward the earth or at an angle past the atmosphere.