Space communications are one of the pillars of RECA Space Agency's activities. They cover all technologies and methods for establishing, maintaining and analysing radio links between space systems and ground stations.
Through this area, RECA is gradually developing expertise geared towards communications with satellites and missions operating at different distances from Earth, with a particular interest in systems for tracking, receiving and analysing signals from space vehicles.
Follow-up and receipt of communications
RECA works on the principles and technologies necessary for the radio tracking of space objects: identification of frequencies, planning of visibility windows, pointing of antennas, reception of signals and analysis of their quality.
These activities include the study of parameters such as frequency, bandwidth, data rate, signal level, signal-to-noise ratio, Doppler shift and the different disturbances that can affect a radio link.
The objective is to understand not only how to receive a space signal, but also how to determine its state, its quality and the conditions necessary for reliable communication.
Ground stations
An important part of this expertise concerns ground stations, which constitute the interface between space systems and terrestrial operators.
RECA studies the architecture of these infrastructures: antennas, RF channels, amplifiers, filters, receivers, synchronisation systems, control software and data processing tools.
The development of partner stations should eventually lead to distributed capacities capable of carrying out monitoring and reception sessions from different sites.
Analysis and data processing
Signals from a spatial system contain essential information about its operation and can be affected by many factors during their propagation.
RECA develops methods and tools for observing and analysing these signals, in particular through spectrum visualization, analysis of received power, identification of frequency variations and the study of Doppler.
This approach also allows the introduction of digital signal processing and automation techniques to facilitate the analysis of the received data.
Telemetry and spatial data
Space communications are not limited to the transmission of conventional voice or data. Space systems use radio links to transmit telemetry information to track the status of a space vehicle.
RECA is interested in the reception and processing chains necessary to exploit this data: signal acquisition, decoding, information extraction, storage and visualization.
The aim is to gradually develop software capable of assisting operators in the whole process, from the reception to the interpretation of the available data.
Research and development
RECA is also conducting experimental work around SDR (Software Defined Radio) technologies, automation of ground stations and the development of software dedicated to tracking space communications.
This work allows experimentation with more flexible and accessible architectures, while developing the skills necessary for the design and operation of space communication systems.
The agency also has a particular interest in communications with deep space missions, where the constraints of distance, received power, propagation delay and tracking accuracy become particularly important.
Training and skills development
RECA considers training as an essential element of the development of space capabilities in Cameroon and Africa.
The agency develops resources and training programs around space communications, ground stations, radio software, signal processing, satellite tracking and mission data analysis.
The aim is to enable students, engineers, researchers and enthusiasts to progressively understand the technologies that maintain contact between Earth and space systems.
Through these activities, RECA aims to build local capacity in space communications and eventually contribute to the emergence of a network of African stations and skills capable of participating in the monitoring of national and international space missions.