# WIA-SPACE-026: Space Debris Tracking Standard v1.0

## Document Information

- **Standard ID:** WIA-SPACE-026
- **Title:** Space Debris Tracking (우주 쓰레기 추적 시스템)
- **Version:** 1.0
- **Status:** Active
- **Publication Date:** 2025-01-01
- **Organization:** WIA (World Certification Industry Association)
- **Philosophy:** 弘益人間 (홍익인간) - Benefit All Humanity

## Abstract

The WIA-SPACE-026 standard provides comprehensive guidelines and protocols for tracking, monitoring, and cataloging space debris in Earth orbit. This standard establishes technical requirements for Space Situational Awareness (SSA) systems, sensor networks, orbital determination methods, and collision warning protocols to ensure the long-term sustainability of space activities.

## 1. Scope

This standard applies to:

- Space surveillance radar systems (ground-based and space-based)
- Optical tracking telescopes and sensor networks
- Laser ranging systems for precision tracking
- Orbital determination and prediction algorithms
- Space object cataloging and correlation
- Collision risk assessment and warning systems
- International data sharing protocols

## 2. Normative References

- ISO 24113:2019 - Space systems — Space debris mitigation requirements
- IADC Space Debris Mitigation Guidelines
- UN Space Debris Mitigation Guidelines
- CCSDS 508.0-B-1 - Conjunction Data Message
- ITU Radio Regulations for space services

## 3. Terms and Definitions

### 3.1 Space Situational Awareness (SSA)
The comprehensive knowledge and understanding of space objects, the space environment, and potential threats to space systems.

### 3.2 Space Surveillance Network (SSN)
A globally distributed network of sensors used to detect, track, and catalog space objects.

### 3.3 Two-Line Element (TLE)
A standardized format for representing orbital elements of Earth-orbiting objects.

### 3.4 Conjunction
A close approach between two space objects that may pose a collision risk.

### 3.5 Probability of Collision (Pc)
The statistical likelihood that two objects will collide based on orbital uncertainties.

## 4. Technical Requirements

### 4.1 Radar Tracking Systems

#### 4.1.1 Ground-based Radar
- **Minimum Detection Size:** 10 cm at 1,000 km altitude (LEO)
- **Tracking Accuracy:** ≤ 100 meters position error
- **Update Frequency:** Minimum once per day per object
- **Coverage:** Hemispheric or better
- **Availability:** ≥ 95% uptime

#### 4.1.2 Space-based Radar (Future)
- **Detection Size:** 5 cm at 500 km altitude
- **Continuous Coverage:** 24/7 operational capability
- **Data Latency:** ≤ 1 hour from detection to catalog update

### 4.2 Optical Tracking Systems

#### 4.2.1 Telescope Requirements
- **Aperture:** Minimum 1 meter for GEO tracking
- **Field of View:** ≥ 2 degrees for survey mode
- **Limiting Magnitude:** ≥ 18 for faint object detection
- **Accuracy:** ≤ 1 arcsecond astrometric precision

#### 4.2.2 Sensor Specifications
- **Detector Type:** CCD or sCMOS
- **Quantum Efficiency:** ≥ 80%
- **Read Noise:** ≤ 5 electrons RMS
- **Frame Rate:** ≥ 1 Hz for LEO tracking

### 4.3 Satellite Laser Ranging (SLR)

#### 4.3.1 Precision Requirements
- **Range Accuracy:** 1-5 mm (millimeter-level)
- **Timing Precision:** ≤ 100 picoseconds
- **Measurement Rate:** ≥ 1 kHz for modern systems
- **Retroreflector:** Cooperative targets with corner cube arrays

#### 4.3.2 Non-cooperative Tracking
- **Detection:** Diffuse reflection from non-cooperative objects
- **Range Accuracy:** 1-2 cm for non-cooperative debris
- **Laser Power:** High-power systems (>100W) recommended

### 4.4 Orbit Determination

#### 4.4.1 TLE Generation
- **Update Frequency:** Daily for active satellites, weekly for debris
- **Propagation Model:** SGP4/SDP4 compliant
- **Epoch Accuracy:** Within 24 hours of latest observation
- **Format:** NORAD Two-Line Element Set standard

#### 4.4.2 High-Precision Orbits
- **Position Accuracy:** ≤ 10 meters (LEO), ≤ 100 meters (GEO)
- **Velocity Accuracy:** ≤ 1 cm/s
- **Perturbation Modeling:** Include J2-J6, atmospheric drag, solar radiation pressure, third-body effects
- **Integration Method:** Numerical integration with adaptive step size

### 4.5 Collision Warning

#### 4.5.1 Screening Parameters
- **Screening Volume:** Customizable based on object characteristics (default: 1 km radial, 5 km in-track/cross-track for LEO)
- **Prediction Window:** 7 days minimum
- **Update Frequency:** Every 12 hours minimum, real-time for high-risk events

#### 4.5.2 Risk Assessment
- **Probability Calculation:** 2D Gaussian method or Monte Carlo
- **Hard Body Radius:** Physical radius + safety margin (minimum 10m)
- **Alert Threshold:** Pc ≥ 1/10,000 for routine alerts
- **Emergency Threshold:** Pc ≥ 1/1,000 for immediate action

### 4.6 Data Formats and Protocols

#### 4.6.1 Conjunction Data Message (CDM)
- **Standard:** CCSDS 508.0-B-1
- **Content:** Object states, covariance matrices, TCA, miss distance, Pc
- **Delivery:** Automated distribution via secure channels
- **Timeliness:** Within 1 hour of conjunction identification

#### 4.6.2 Catalog Data
- **Object ID:** NORAD catalog number
- **Classification:** Payload, rocket body, debris, unknown
- **Orbital Elements:** Semi-major axis, eccentricity, inclination, RAAN, argument of perigee, mean anomaly
- **Physical Properties:** Size (when known), RCS, mass estimate

## 5. Operational Requirements

### 5.1 Catalog Management

- **Completeness:** Track all objects ≥ 10 cm in LEO, ≥ 1 m in GEO
- **Currency:** Update orbits within 7 days of last observation
- **Correlation:** Automated association of new observations with catalog objects
- **Accuracy:** ≥ 95% correct correlation rate

### 5.2 International Cooperation

- **Data Sharing:** Participate in international SSA data exchange
- **Standards Compliance:** Use CCSDS and ISO standards for data formats
- **Emergency Response:** 24/7 availability for collision warnings
- **Transparency:** Publish unclassified catalog data publicly

### 5.3 Quality Assurance

- **Sensor Calibration:** Annual calibration against known objects
- **Orbit Validation:** Cross-check with independent measurements (e.g., GNSS, SLR)
- **Algorithm Verification:** Benchmark against industry-standard software
- **Documentation:** Maintain detailed records of observations and processing

## 6. Performance Metrics

### 6.1 Detection Capability
- **Catalog Size:** Number of tracked objects
- **Completeness:** Percentage of detectable objects tracked
- **Discovery Rate:** New objects added per month

### 6.2 Tracking Accuracy
- **Position Error:** RMS position error vs. truth data
- **Velocity Error:** RMS velocity error
- **Prediction Accuracy:** Orbit prediction error over 1, 3, 7 days

### 6.3 Collision Warning
- **False Alarm Rate:** < 10% of warnings should be false positives
- **Miss Rate:** < 1% of actual high-risk conjunctions missed
- **Timeliness:** Warnings issued ≥ 48 hours before TCA

## 7. Security and Privacy

### 7.1 Classified Information
- **National Security:** Protect sensitive satellite information
- **Minimum Disclosure:** Share only necessary data for collision avoidance
- **Anonymization:** Option to anonymize sensitive satellite identities

### 7.2 Data Integrity
- **Authentication:** Cryptographic signing of data products
- **Access Control:** Role-based access to sensitive data
- **Audit Trails:** Log all data access and distribution

## 8. Future Technologies

### 8.1 AI and Machine Learning
- **Automated Detection:** AI-based object classification
- **Prediction Enhancement:** ML models for improved orbit prediction
- **Anomaly Detection:** Automated identification of unusual events

### 8.2 Advanced Sensors
- **Sub-centimeter Detection:** Development of sensors for < 1 cm debris
- **Quantum Radar:** Research into quantum entanglement-based detection
- **Distributed Networks:** CubeSat-based sensor constellations

### 8.3 Space-based Systems
- **On-orbit Sensors:** Satellite-mounted tracking systems
- **Cooperative Tracking:** Satellites tracking each other
- **Real-time Networks:** Continuous, autonomous space traffic management

## 9. Compliance and Certification

Organizations implementing this standard should:

1. Demonstrate technical capability to meet sensor specifications
2. Establish 24/7 operational procedures
3. Participate in international data sharing
4. Maintain quality assurance programs
5. Publish annual performance reports

Certification may be granted by WIA after successful audit and verification.

## 10. Revision History

| Version | Date | Changes |
|---------|------|---------|
| 1.0 | 2025-01-01 | Initial release |

## Appendix A: Reference Implementations

Example software and systems:
- **SGP4 Libraries:** Python (skyfield), C++ (SGP4), JavaScript (satellite.js)
- **Orbit Determination:** ODTK (AGI), GEODYN (NASA), Orekit (open-source)
- **Collision Analysis:** CARA (NASA), AutoCon (Numerica)

## Appendix B: Contact Information

**WIA Space Standards Committee**
- Website: https://wia-official.org
- Email: space-standards@wia-official.org

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**Copyright © 2025 SmileStory Inc. / WIA**

弘益人間 (홍익인간) · Benefit All Humanity

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