--- title: "Space safety: Space and satellite | Nexus Observatory" description: "Space safety, inside Space and satellite systems: TT&C radio links, telemetry and telecommand protocols, ranging and orbit determination…" url: https://observatory.global/space/space-safety/ publisher: Nexus Observatory Inc. updated: 2026-10-29 --- [Nexus Observatory](https://observatory.global/) / [Space and satellite systems](https://observatory.global/space/) / **Space safety** # Tracking, telemetry and command, conjunction awareness. Space safety, inside Space and satellite systems: TT&C radio links, telemetry and telecommand protocols, ranging and orbit determination, space link security and more. Every item is traced to its specification, from CCSDS 401.0-B (RF and modulation systems) to ECSS-E-ST-50-05C (RF and modulation), and runs on the open Observatory Protocol. [Plan with us](https://observatory.global/contact/) Architecture [The protocol](https://observatory.global/protocol/specification/) **Technologies**: 9 **At the frontier**: 1 **Protocol functions**: 5 of 8 **Industries served**: 10 Reference design, drawn to scale · drag to turn · hover a part **01** What it is ## Tracking, telemetry and command and space safety. The space segment end to end: orbits and constellations, spacecraft buses, communications and Earth observation payloads, inter-satellite links, tracking and command, space safety, launch, and the licensing and filings that let a system operate over a site. Each technology below carries what it is, what we do with it, and the standard it is drawn against. Satellite and space systems ### TT&C radio links S and X band links for housekeeping telemetry, commanding and ranging throughout the mission. We design, integrate and operate. CCSDS 401.0-B (RF and modulation systems) · ECSS-E-ST-50-05C (RF and modulation) Satellite and space systems ### Telemetry and telecommand protocols Packet and frame standards that let ground systems and spacecraft from different suppliers interoperate. We design, integrate and operate. CCSDS 132.0-B (TM space data link) · CCSDS 232.0-B (TC space data link) · ECSS-E-ST-70-41C (packet utilisation standard) Satellite and space systems ### Ranging and orbit determination Ranging, Doppler and GNSS-derived tracking that produce the orbit solutions every pass and manoeuvre depends on. We design and operate. CCSDS 414.1-B (pseudo-noise ranging) · CCSDS 503.0-B (Tracking Data Message) Satellite and space systems ### Space link security Authentication and encryption of command and telemetry links so spacecraft accept only authorised commands. We design, integrate and operate. CCSDS 355.0-B (Space Data Link Security) · NIST IR 8270 (cybersecurity for commercial satellite operations) Satellite and space systems ### Conjunction assessment and collision avoidance Screening of close approaches and planning of avoidance manoeuvres using standard conjunction messages. We operate and support. CCSDS 508.0-B (Conjunction Data Message) · ISO 24113 (space debris mitigation) Satellite and space systems ### Space situational awareness sensing Radar, optical and passive RF tracking of objects in orbit, and fusion of shared catalogue data. We design, integrate and operate. CCSDS 503.0-B (Tracking Data Message) · UN COPUOS Guidelines for the Long-term Sustainability of Outer Space Activities Satellite and space systems ### Space weather monitoring Solar and geomagnetic monitoring that predicts drag, charging, radiation and ionospheric effects on links and GNSS. We integrate and operate. NOAA Space Weather Scales · ECSS-E-ST-10-04C (space environment) Satellite and space systems ### Debris mitigation and end-of-life disposal Design and operations that limit debris and remove spacecraft from protected orbits after mission end. We design and operate. ISO 24113 (space debris mitigation) · IADC Space Debris Mitigation Guidelines · FCC orbital debris rules (five-year post-mission disposal) **Frontier** · Satellite and space systems ### Rendezvous, proximity operations and on-orbit servicing Inspection, refuelling, life extension and removal missions that change how space assets are maintained. We design and support. ISO 24330:2022 (RPO and on-orbit servicing) **02** Architecture ## Where it sits, and what it speaks. Space safety draws on 3 domains and 24 layers of the spectrum; the highlighted layers carry this area. It speaks 5 of the protocol's 8 core functions. Orbits and constellations 8 Spacecraft buses and platforms 9 Communications payloads, NTN and direct-to-device 9 Inter-satellite and space-to-ground links 7 Earth observation payload classes 10 Tracking, telemetry and command and space safety 9 Launch, licensing and regulation 8 Frontier and research 6 Gateways and teleports 8 User terminals 9 Baseband, modems and software-defined radio 8 Ground-station-as-a-service and antenna networks 7 CCSDS protocol stacks 9 Mission control and flight dynamics 7 Data downlink, processing and distribution 8 Earth station spectrum coordination and interference 7 01**Join** Identity, attestation quote, signed policy. 02**Admit** Admitted for a stated scope, nothing wider. 03**Describe** What, where, how and by whom, with calibration. 04**Time** One clock across the grid, with its error bound. 05**Observe** Every value with quality and provenance. 06**Qualify** Tested against the specification, state on record. 07**Federate** Signed exchange across grids and trust domains. 08**Orchestrate** Software and configuration by signed plan. **03** On the grid ## Every site joins one observing grid. The open networks on the grid today, over real relief and the geodesic cells we count them into, filtered to the space domain this area serves. A site built here enrols into the same grid. **04** In the field ## Where this runs, sector by sector. 6 deployment scenarios from the sector research that rely on space safety. [Transport Highway corridor mobile coverage for safetySmall cells and satellite backhaul along unserved roads.](https://observatory.global/sectors/transport/) [Communities and rural Interim public-safety broadband where no national network existsPrivate LTE or 5G for fire and medical services in territories without a national public-safety network.](https://observatory.global/sectors/communities/) [Environment and climate Wildfire smoke and particulate health networksOverlaps with cities and public safety.](https://observatory.global/sectors/environment/) [Government and public safety Deployable communications and sensing for incident commandA cell on wheels with satellite backhaul, mesh telemetry and environment nodes at the incident base.](https://observatory.global/sectors/public-safety/) [Development and humanitarian School connectivity with a school observatorySatellite or fixed wireless, school Wi-Fi, an open connectivity probe and an optional station.](https://observatory.global/sectors/humanitarian/) [Development and humanitarian Displacement-site connectivity and sensingPoint-to-multipoint wireless, satellite backhaul, solar and water-point sensors with protection safeguards.](https://observatory.global/sectors/humanitarian/) **05** Open and enterprise ## Open by default. Enterprise by contract. The open counterpart lives on the main site for anyone to read and run. The enterprise service is designed, deployed and operated with you, under contract. Open, on the main site - Orbit and pass methods - Payload class catalogue - Ground-station interfaces on the protocol Enterprise, on this site - Mission and payload integration - Tasking and downlink services - Non-terrestrial backhaul for remote sites **06** The rest of the line ## Space and satellite systems, area by area. [Space and satellite systems Constellations and orbitsLEO, MEO and GEO, sized to revisit and coverage.](https://observatory.global/space/constellations-and-orbits/) [Space and satellite systems Spacecraft and payloadsBuses and optical, radar and RF payload classes.](https://observatory.global/space/spacecraft-and-payloads/) [Space and satellite systems NTN and direct-to-device3GPP non-terrestrial networks, from orbit to handset.](https://observatory.global/space/ntn-and-direct-to-device/) [Space and satellite systems Tasking and downlinkRequest, schedule, receive and process: one chain.](https://observatory.global/space/tasking-and-downlink/) [Space and satellite systems Licensing and spectrumFilings, coordination and earth-station rules, by country.](https://observatory.global/space/licensing-and-spectrum/) ## Bring us the site. Survey, design, deployment and operation for space safety. The form names who receives your details. [Talk to us](https://observatory.global/contact/) [contact@observatory.global](mailto:contact@observatory.global?subject=Space%20and%20satellite%20systems%3A%20Space%20safety) [Nexus Observatory](https://observatory.global/)**Space and satellite systems** . From orbit to the ground, on one protocol.[Talk to us](https://observatory.global/contact/) Space and satellite systems - [Constellations and orbits](https://observatory.global/space/constellations-and-orbits/) - [Spacecraft and payloads](https://observatory.global/space/spacecraft-and-payloads/) - [NTN and direct-to-device](https://observatory.global/space/ntn-and-direct-to-device/) - [Tasking and downlink](https://observatory.global/space/tasking-and-downlink/) - [Space safety](https://observatory.global/space/space-safety/) - [Licensing and spectrum](https://observatory.global/space/licensing-and-spectrum/) Technologies - [Orbits and constellations](https://observatory.global/technologies/satellite/orbits-and-constellations/) - [Spacecraft buses and platforms](https://observatory.global/technologies/satellite/spacecraft-buses-and-platforms/) - [Gateways and teleports](https://observatory.global/technologies/ground/gateways-and-teleports/) - [User terminals](https://observatory.global/technologies/ground/user-terminals/) - [Platforms and orbits](https://observatory.global/technologies/eo/platforms-and-orbits/) - [Optical, spectral and thermal sensors](https://observatory.global/technologies/eo/optical-spectral-and-thermal-sensors/) Industries - [Public safety](https://observatory.global/industries/public-safety/) - [Humanitarian](https://observatory.global/industries/humanitarian/) - [Climate](https://observatory.global/industries/climate/) - [Nature](https://observatory.global/industries/nature/) - [Oceans](https://observatory.global/industries/oceans/) - [Agriculture](https://observatory.global/industries/agriculture/) - [Telecom](https://observatory.global/industries/telecom/) Service platforms - [Observatory Protocol](https://observatory.global/protocol/) - [Protocol & Grid](https://observatory.global/grid-services/) - [Software](https://observatory.global/software/) - [Hardware & power](https://observatory.global/hardware/) - [Sensors & instruments](https://observatory.global/sensors/) - [Connectivity](https://observatory.global/connectivity/) - [Edge compute & AI](https://observatory.global/edge-ai/) © 2026 Nexus Observatory Inc. 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