CubeSat SSA Deployment Plan
Executive Summary
Objective: Deploy a constellation of CubeSats with active sensing (lidar) capabilities to complement ground-based passive optical SSA network.
Problem: Ground-based optical SSA has fundamental limitations:
- Only works during twilight (sun-illuminated targets)
- Cannot measure range directly (needs triangulation)
- Cannot see through clouds
- Limited to objects >10cm at LEO altitudes
Solution: Active sensing from orbit overcomes all limitations.
Why CubeSats?
Traditional Approach: Ground Radar
| System |
Cost |
Capability |
| US Space Fence |
$1B+ |
Tracks 200,000+ objects |
| Goldstone Radar |
$300M+ |
Deep space tracking |
| EISCAT |
€50M+ |
Europe radar |
Problem: Expensive, limited coverage, single point of failure.
CubeSat Approach
| Constellation |
Cost |
Capability |
| 5× CubeSat + lidar |
$500K-1M |
Day/night, range, full 3D |
| 20× CubeSat |
$2-4M |
Global coverage, real-time |
Advantage: 100-1000× cheaper than traditional radar.
Cost Breakdown by Component
1. CubeSat Bus (3U Standard)
| Component |
COTS Cost |
Custom Cost |
Notes |
| Structure |
$5,000 |
$3,000 |
3U frame, off-the-shelf |
| ADCS (Attitude) |
$15,000 |
$10,000 |
Star tracker, reaction wheels |
| Power (solar + battery) |
$10,000 |
$8,000 |
GaInP solar, Li-ion |
| OBC (Computer) |
$2,000 |
$1,500 |
Rad-tolerant CPU, memory |
| Comms (UHF/VHF) |
$3,000 |
$2,500 |
Antenna + radio |
| Thermal |
$2,000 |
$1,500 |
Passive + heaters |
| Bus Total |
$37,000 |
$26,000 |
|
2. Lidar Payload
| Component |
Cost |
Notes |
| Laser (fiber, 1550nm) |
$15,000 |
Eye-safe, COTS |
| Detector (APD array) |
$12,000 |
Single photon sensitive |
| Optics (telescope) |
$8,000 |
10cm aperture, custom |
| Scanner/Mirror |
$5,000 |
Solid-state or MEMS |
| Electronics (TDC, FPGA) |
$8,000 |
Time-tagging electronics |
| Payload Total |
$48,000 |
|
3. Integration & Testing
| Item |
Cost |
Notes |
| Integration |
$10,000 |
Assembly, wiring |
| Environmental Test |
$15,000 |
TVAC, vibration |
| Launch Verification |
$5,000 |
Ground segment |
| Testing Total |
$30,000 |
|
4. Launch
| Option |
Cost |
Notes |
| SpaceX Rideshare |
$25,000-50,000 |
Per CubeSat, sun-synch |
| Rocket Lab |
$50,000-75,000 |
Dedicated or rideshare |
| Launch Total |
$30,000-75,000 |
Sun-synchronous preferred |
Total Cost Summary
Per Unit (3U with Lidar)
| Category |
Low |
High |
| Bus |
$26,000 |
$37,000 |
| Lidar Payload |
$48,000 |
$48,000 |
| Integration & Test |
$30,000 |
$30,000 |
| Launch |
$30,000 |
$75,000 |
| Total Per Unit |
$134,000 |
$190,000 |
Constellation Options
| Constellation |
Units |
Cost Range |
Coverage |
| Pilot |
2 |
$300-400K |
Regional |
| Operational |
5 |
$700K-1M |
Global, revisit 4-6 hrs |
| Enhanced |
10 |
$1.4-2M |
Global, revisit 2-3 hrs |
| Full |
20 |
$2.8-4M |
Global, real-time |
Lidar Payload Specifications
| Parameter |
Value |
Notes |
| Range |
300-2000 km |
LEO coverage |
| Range Resolution |
1-10 m |
Sufficient for debris |
| Angular Resolution |
0.001° |
Pointing accuracy |
| Power Consumption |
<20 W |
Average |
| Mass |
<4 kg |
Within 3U budget |
| Volume |
<1U |
Payload bay |
Wavelength Options
| Wavelength |
Eye Safety |
Atmosphere |
Cost |
Notes |
| 532nm (green) |
Dangerous |
Absorbed |
Low |
Classic choice |
| 905nm (NIR) |
Moderate |
Low absorption |
Medium |
Common in automotive |
| 1550nm (IR) |
Eye-safe |
Low absorption |
Higher |
Preferred for space |
Recommendation: 1550nm (eye-safe, better atmospheric penetration)
Detector Options
| Detector |
Sensitivity |
Cost |
Notes |
| PMT |
Single photon |
$20,000+ |
Classic choice |
| APD |
Single photon |
$8,000-15,000 |
Good balance |
| SiPM |
Single photon |
$5,000-10,000 |
Emerging, cheap |
| SPAD |
Single photon |
$3,000-8,000 |
Best for CubeSat |
Recommendation: SiPM or SPAD (single photon counting, low power, cheap)
Ground Segment Costs
Command & Control
| Component |
Cost |
Notes |
| Ground Station (UGS) |
$50,000 |
TRL-9, off-the-shelf |
| Network Operations |
$10,000/yr |
Staff or contractor |
| Data Processing Server |
$5,000 |
Cloud or on-prem |
Network Architecture
┌─────────────────────────────────────────────────────────────┐
│ CUBESAT CONSTELLATION │
│ │
│ ☊ Lidar ☊ Lidar ☊ Lidar ☊ Lidar ☊ Lidar │
│ ↓ ↓ ↓ ↓ ↓ │
│ │
└─────────────────────────────────────────────────────────────┘
│
▼
┌──────────────────────────────────────┐
│ GROUND SEGMENT │
│ │
│ ┌─────────┐ ┌─────────────────┐ │
│ │Ground │ │ Mission Ctrl │ │
│ │Stations │◄──►│ & Data Proc │ │
│ └─────────┘ └─────────────────┘ │
│ │ │ │
│ ▼ ▼ │
│ ┌─────────┐ ┌─────────────────┐ │
│ │ TT&C │ │ OpenASTRO SSA │ │
│ │(Telemetry)│ │ Integration │ │
│ └─────────┘ └─────────────────┘ │
└──────────────────────────────────────┘
Ground Segment Total: $75,000-150,000
Cost Comparison
Traditional vs CubeSat vs Hybrid
| Approach |
Cost |
Capability |
Risk |
| Ground Radar Only |
$300M+ |
Excellent |
Single point |
| Ground Optical Only |
$10K-50K |
Limited |
Weather, twilight |
| CubeSat Constellation |
$1-2M |
Excellent |
Tech risk |
| Hybrid (Ground + CubeSat) |
$1-2.1M |
Best |
Lowest |
Recommendation: Hybrid approach - use CubeSats for active sensing + ground network for passive calibration.
Development Timeline
Phase 1: Prototype (6-9 months)
Month 1-2: Requirements, procurement
Month 3-4: Bus integration
Month 5-6: Payload integration
Month 7-8: Testing (TVAC, vibration)
Month 9: Launch
Phase 2: Constellation (12-18 months)
Month 1-6: 5× production units
Month 7-12: Ground segment development
Month 12-18: Staggered launches
Phase 3: Operations
Ongoing: Ground segment operations
Year 1-2: Constellation commissioning
Year 3+: Constellation expansion (optional)
Technical Risks & Mitigations
| Risk |
Probability |
Impact |
Mitigation |
| Launch delay |
High |
Medium |
Buy launch insurance, flexible schedule |
| Lidar performance |
Medium |
High |
Ground testing, redundant ranging |
| Power budget |
Low |
High |
Detailed analysis, solar panel testing |
| ADCS pointing |
Medium |
High |
Star tracker calibration, error budgets |
| Radiation effects |
Medium |
Medium |
Radiation-hardened components, shielding |
| Cost overrun |
High |
Medium |
20% contingency, phased development |
Funding Options
Government/Military
- Space Force SBIR grants ($1-2M typical)
- DARPA blackjack program ($50M+)
- ESA contracts
Private/Commercial
- Space industry partnerships
- Insurance companies (collision data)
- Satellite operators (conjunction alerts)
Research/Academic
- NSF MRI grants ($500K-2M)
- NASA small satellite programs
- University research funding
Operations Model
Data Flow
CubeSat Acquisition
│
▼
Raw Lidar Range Data
│
▼
On-board Processing (FPGA)
│
├── Point Cloud Generation
├── Object Detection
└── Compression
│
▼
Downlink to Ground Stations (X-band)
│
▼
Mission Control → OpenASTRO SSA Integration
│
├── 3D Position (range + angle)
├── Orbit Determination
├── Catalog Updates
└── Collision Alerts
Data Products
| Product |
Latency |
Accuracy |
Customers |
| Raw Tracks |
<1 hour |
1-10m range |
Research |
| Orbital Elements |
<4 hours |
<100m |
Operators |
| Collision Alerts |
<1 hour |
1 in 1000 |
Satellite ops |
| Debris Catalog |
Weekly |
<1km |
All |
Integration with OpenASTRO Ground Network
Combined Architecture
┌─────────────────────────────────────────────────────────────┐
│ OPENASTRO SSA NETWORK │
├─────────────────────────────────────────────────────────────┤
│ │
│ ┌──────────────────────────────────────────────────────┐ │
│ │ GROUND LAYER (Passive Optical) │ │
│ │ │ │
│ │ 🌐 Detection nodes (50× IMX307, $130 each) │ │
│ │ 🔭 Tracking stations (5×, $500 each) │ │
│ │ 📡 Wide-field cameras (all-sky) │ │
│ │ │ │
│ │ Provides: │ │
│ │ • Angular positions (RA, Dec) │ │
│ │ • Detection & association │ │
│ │ • Catalog maintenance │ │
│ └──────────────────────────────────────────────────────┘ │
│ │ │
│ │ (when visible) │
│ ▼ │
│ ┌──────────────────────────────────────────────────────┐ │
│ │ SPACE LAYER (Active Lidar) │ │
│ │ │ │
│ │ 🛰️ 5× CubeSats with lidar │ │
│ │ • Range measurements (direct, not parallax) │ │
│ │ • Day/night operation │ │
│ │ • Cloud-free sensing │ │
│ │ │ │
│ │ Provides: │ │
│ │ • Direct range (no triangulation needed) │ │
│ │ • 3D position + velocity │ │
│ │ • Fill gaps in ground coverage │ │
│ └──────────────────────────────────────────────────────┘ │
│ │
└─────────────────────────────────────────────────────────────┘
Synergy Benefits
| Ground Network |
CubeSat Layer |
Combined Result |
| Angular only |
Range only |
Full 3D orbit |
| Twilight only |
24/7 |
Continuous |
| Weather dependent |
All-weather |
Cloud-free |
| Large debris |
Small debris |
Complete catalog |
| Catalog maintenance |
Active tracking |
Collision prediction |
Next Steps
- [ ] Finalize lidar payload specification
- [ ] Contact 3 potential bus manufacturers
- [ ] Apply for Phase 1 funding (SBIR/grant)
- [ ] Establish ground segment partnership
Phase 1 (6-12 months)
- [ ] Build prototype CubeSat
- [ ] Ground testing (TVAC)
- [ ] Secure launch slot
- [ ] Commission first unit
Phase 2 (12-24 months)
- [ ] Produce 4 additional units
- [ ] Deploy constellation
- [ ] Integrate with OpenASTRO ground network
- [ ] Begin operational SSA services
Appendix: Detailed Component Costs
Lidar Subsystem Breakdown
LIDAR PAYLOAD COSTS
Laser Source:
├─ 1550nm fiber laser (1-10mJ, 1-10kHz) $12,000-18,000
├─ Laser driver electronics $2,000-3,000
└─ Beam expander/collimator $3,000-5,000
Subtotal: $17,000-26,000
Detector:
├─ SiPM array (8×8 or 16×16) $5,000-8,000
├─ TDC (time-to-digital converter) $3,000-5,000
├─ Detector electronics $2,000-3,000
└─ Low-noise power supply $1,000-2,000
Subtotal: $11,000-18,000
Optics:
├─ Telescope (10cm aperture, diffraction-limited) $6,000-10,000
├─ Baffle/light shroud $1,000-2,000
└─ Window (if applicable) $500-1,000
Subtotal: $7,500-13,000
Scanner (if applicable):
├─ Solid-state scanner (acousto-optic) $3,000-5,000
└─ Scanner electronics $1,000-2,000
Subtotal: $4,000-7,000
TOTAL LIDAR PAYLOAD: $39,500-64,000
Spacecraft Bus Breakdown
3U CUBESAT BUS COSTS
Structure:
├─ 3U frame (aluminum) $3,000-5,000
├─ Fastening hardware $500-1,000
└─ PCB mounting rails $500-1,000
Subtotal: $4,000-7,000
ADCS:
├─ Star tracker (commerical) $8,000-12,000
├─ Reaction wheels (3-axis, 4 units) $5,000-8,000
├─ Magnetometer $1,500-2,500
├─ Sun sensors (redundant) $500-1,000
├─ GPS receiver (space-grade) $3,000-5,000
└─ ADCS processor/electronics $2,000-3,000
Subtotal: $20,000-31,500
Power:
├─ Solar panels (3U, GaInP) $6,000-10,000
├─ Li-ion battery pack $3,000-5,000
├─ Power conditioning/distribution $2,000-3,000
└─ Battery protection circuit $500-1,000
Subtotal: $11,500-19,000
Command & Data Handling:
├─ OBC (rad-tolerant ARM or similar) $1,500-2,500
├─ Solid-state recorder (64GB+) $1,000-2,000
├─ I/O interface boards $500-1,000
└─ Software (flight + ground) $5,000-10,000
Subtotal: $8,000-15,500
Communications:
├─ UHF/VHF transceiver $1,500-2,500
├─ Antenna (deployable, omnidirectional) $1,000-2,000
├─ TNC modem $300-500
└─ Coax cables, connectors $200-500
Subtotal: $3,000-5,500
Thermal:
├─ MLI (multi-layer insulation) $1,000-2,000
├─ Heaters (resistive) $300-500
├─ Thermistors (temperature sensors) $200-300
└─ Heat pipes/spreaders $500-1,000
Subtotal: $2,000-3,800
TOTAL BUS: $48,500-82,300
Summary
| Item |
Low |
High |
| CubeSat Bus |
$48,500 |
$82,300 |
| Lidar Payload |
$39,500 |
$64,000 |
| Integration & Test |
$25,000 |
$35,000 |
| Launch (share) |
$30,000 |
$75,000 |
| Ground Segment |
$75,000 |
$150,000 |
| Per Unit + Share |
$218,000 |
$406,000 |
| 5-Unit Constellation |
$1,090,000 |
$2,030,000 |
Key Insight: A 5-unit CubeSat constellation with lidar can provide active SSA sensing for $1-2M total - less than 1% of a single ground radar system.