CELESTIA Satellite Test & Simulation

Updated 25 Jul 2026
Manufacturer Netherlands Listed
13 Products
41 Years Active
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About CELESTIA Satellite Test & Simulation

Celestia Satellite Test & Simulation (C-STS) designs and manufactures ground-based solutions for satellite simulation, testing, communication, and data processing. The company specializes in Electrical Ground Support Equipment (EGSE), TT&C solutions, and Optical Modems. Their systems are utilized in institutional laboratories, spacecraft integration facilities, and operational ground stations. C-STS's products have been used in missions such as Galileo, EAGLE-1, and ESA Copernicus satellites. The company has contributed to over 80% of major European Space Agency missions. C-STS is headquartered in Noordwijk, The Netherlands. Founded in 1985, it operates as part of the Celestia Group.

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Products

13
Flight-proven

Optical modem optimized for communication with the EAGLE-1 QKD satellite — classical optical terminal validation, programmable tunable seeds.

1 2

Turn-key system providing electrical and protocol interfaces to satellite instruments during development and AIT — power, control/monitor, and science interfaces.

1 2

LVDS Data/Clock interface unit for satellite flight equipment across all AIT levels — up to 4 parallel channels, up to 2Gbps at 16-bit.

1 5

EGSE unit controlling, monitoring, and simulating flight equipment on the satellite onboard data handling bus — MIL-STD-1553B BC/RT/BM functions, ECSS compliant.

1 4

Modular, scalable EGSE testing spacecraft electrical/data interfaces — supports up to 16 modules, >400 channels, ESA/ECSS compliant.

1 7
Flight-proven

Radio Frequency Special Check-Out Equipment validating satellite RF subsystems — flight heritage on ESA missions including Sentinel-2, EarthCare, SeoSat.

1 2

Transportable system for ground station and satellite RF compatibility testing — built using Engineering Models of transponder, TWTAs, diplexer, and filters.

1 2
Flight-proven

Testing equipment allowing an instrument or spacecraft unit to be developed and tested prior to overall spacecraft integration — flight heritage on SOHO, CLUSTER, ROSETTA.

1 1

Telemetry and telecommand unit for direct spacecraft control during AIT and launch phases — 60x RS422/LVDS pairs, galvanically isolated.

1 3

Integrated modem and baseband unit providing Telemetry, Tracking, and Command services for operational ground stations — frequency-sweeping uplink acquisition.

1 3

Advanced Telemetry Tracking and Command Processor for deep space communications — delta-DOR tracking, deployed at all ESA Deep Space Network ground stations.

1 6

Integrated modem and baseband unit for direct spacecraft control/monitoring in EGSE environments — FPGA-based real-time modulation/demodulation, Doppler/ranging processing.

1 5

High-speed serial interface unit for spacecraft flight equipment validation — up to 4 parallel channels at 2Gbps each, 10Gbit LAN data streaming.

1 6

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