Always-On Emergency Connectivity for Assistive Technology
We're building open-source satellites to ensure that every person using assistive technology has emergency connectivity—regardless of location, infrastructure, or ability to pay. Because a 911 signal should never depend on cell tower coverage.
Assistive technology is only as reliable as its connection. When that connection fails, vulnerable people are left without their safety net.
Millions of elderly and disabled individuals live in areas with no cellular coverage. A fall detection device that can't send an alert is just expensive jewelry.
Natural disasters destroy cell towers. Power outages disable networks. The moments when help is most needed are often when connectivity fails.
Satellite communication has historically cost $15-50/month per device. For someone on a fixed income with multiple health devices, this is prohibitive.
Cellular networks cover only ~15% of Earth's surface. Traditional satellite services cost too much for most users. But new small satellite technology has dropped launch costs by 95% in the last decade. We can now build emergency connectivity infrastructure that's open-source, affordable, and independent of commercial networks.
A hybrid architecture that uses existing networks when available, and falls back to satellite when they're not.
ARIA SENTINEL ARCHITECTURE ═══════════════════════════════════════════════════════════════════════════════ SPACE SEGMENT 🛰️ 🛰️ 🛰️ Sentinel-1 Sentinel-2 Sentinel-N ╲ │ ╱ ╲ │ ╱ ╲ │ ╱ ← LEO Orbit (500km) ╲ │ ╱ ═══════════════════════════════════════════════════════════════════════════════ GROUND SEGMENT 📱 ARIA Device 📡 Ground Stations (Patient's Home) (Distributed Network) │ │ │ ← Primary: WiFi/Cellular (when available) │ │ ← Fallback: Satellite uplink (emergency) │ │ │ ▼ ▼ ┌─────────────────────────────────────────────────────────────────────┐ │ │ │ HYBRID CONNECTIVITY MODULE │ │ ├── WiFi/Cellular: Normal operation, real-time data │ │ ├── Satellite IoT: Emergency alerts, daily health check-ins │ │ └── Store-and-Forward: Queues data when no connection available │ │ │ └─────────────────────────────────────────────────────────────────────┘ │ ▼ ☁️ ARIA Cloud (Zero-Knowledge Architecture) │ ▼ ┌─────────────────────────┐ │ 📱 Caregiver App │ │ 🏥 Emergency Services │ │ 👨⚕️ Healthcare Provider │ └─────────────────────────┘
Satellite bandwidth is limited and precious. ARIA Sentinel uses intelligent prioritization to ensure critical messages always get through.
| Priority | Message Type | Size | Latency Target |
|---|---|---|---|
| P0 - Critical | Fall detected, cardiac event, SOS button | ~50 bytes | < 2 minutes |
| P1 - Urgent | Medication missed (2+ hours), unusual vitals | ~100 bytes | < 15 minutes |
| P2 - Normal | Daily health summary, medication confirmations | ~200 bytes | < 6 hours |
| P3 - Low | Firmware updates, configuration sync | Variable | < 24 hours |
Starlink and similar services are designed for high-bandwidth internet access, requiring powered dishes and $120+/month subscriptions. ARIA Sentinel is optimized for low-power, low-bandwidth, high-reliability emergency messaging—a fundamentally different use case. Our devices can run on batteries for years and cost $5/month to operate. We're not replacing the internet; we're providing a safety net when the internet isn't there.
A phased approach that delivers value immediately while building toward full satellite independence.
Integrate with existing satellite IoT networks (Swarm, Astrocast) to provide immediate coverage while developing our own infrastructure.
Launch our first PocketQube satellite as a technology demonstrator and research platform.
Deploy 6-12 satellites for regional coverage (e.g., North America), establish ground station network.
Expand to 40-100 satellites for near-continuous global coverage. Transition to fully open, community-governed infrastructure.
Unlike commercial satellite operators, ARIA Sentinel will publish all satellite designs, ground station specifications, and communication protocols under open-source licenses. Any organization can build compatible infrastructure. We're not building a company—we're building a public utility for emergency health connectivity.
ARIA Sentinel is grounded in peer-reviewed research on connectivity gaps, satellite IoT technology, and health equity.
Studies show that reliable connectivity for remote patient monitoring reduces hospital readmissions by 25-50% and improves medication adherence by up to 40%. Connectivity gaps directly translate to worse health outcomes.
Average emergency response time in rural areas is 14+ minutes compared to 7 minutes in urban areas. For cardiac events and falls, every minute of delay significantly increases mortality and permanent disability risk.
The cost of launching 1kg to orbit has dropped from $54,500 (Space Shuttle) to $2,720 (SpaceX Falcon 9). PocketQube satellites now cost under $30,000 to build and launch, making community-owned space infrastructure feasible.
The digital divide compounds health disparities. Populations most likely to need assistive technology (elderly, disabled, low-income) are also least likely to have reliable internet access. Satellite bridges this gap.
| Topic | Source | Key Finding |
|---|---|---|
| Satellite IoT Architecture | IEEE Spectrum, 2024 | CubeSat constellations can provide global IoT coverage for <$5/device/month |
| LoRaWAN over Satellite | Lacuna Space Technical Paper | Standard LoRa devices can reach LEO satellites with minor modifications |
| NB-IoT via Satellite (3GPP R17) | 3GPP Specification, 2022 | Existing cellular IoT devices can connect to satellites with software updates |
| Open-Source Satellites | Libre Space Foundation | Community-operated ground station network now covers 6 continents |
Health data is sensitive. ARIA Sentinel is designed so that no one—not even us—can access your data without your explicit consent.
Data is encrypted on your ARIA device before transmission. Only your designated caregivers hold decryption keys. Satellites and servers see only encrypted blobs.
Our servers cannot decrypt your health data. We store and forward encrypted messages but have "zero knowledge" of their contents. You own your data, always.
For maximum privacy, you can run your own ground station and server. Our open-source stack lets you operate completely independent of any central service.
ARIA Sentinel is an open research initiative. Whether you're an engineer, healthcare professional, maker, or someone who believes everyone deserves emergency connectivity, there's a way to contribute.