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A bifunctional pyrazole-based phosphine ligand was synthesized and applied to preparation of a series of ruthenium complexes. Application of the latter to transfer hydrogenation of acetophenone showed moderate activity. X-ray studies of two ruthenium complexes were carried out.
The paper provides an analysis of existing simulation tools for the on-board and local area networks. We overview the main abilities of the existing software and then propose the computer-aided design (CAD) system for SpaceWire onboard networks design and simulation. This CAD system will support the full on-board network design and simulation flow, which begins from the network topology automated...
High-speed onboard networks for the space industry with a lot of tasks that could be solved only by transmitting large data streams in a short time, with minimum overheads and accepted latencies. Particular tasks for data transmission require various types of traffic and onboard network topologies. Video data in many applications generate high throughput real-time data streams, from most demanding...
Modern and prospective spacecraft data system networks consist of many systems and sensors producing streaming traffic. Outside spacecraft video cameras also generate intensive data streams. Motion video traffic requires specific latency and speed. Video frames should be delivered with small delays and jitter over high-rate SpaceFibre networks. The paper considers live streaming video over onboard...
The paper provides the analysis of the existing solutions for the flow control mechanisms of the well-known industrial protocols (Infiniband, Fibre Channel, PCI Express, USB 3.1), protocols for mobile communications (UniPro), protocols for global networks (TCP/IP) and onboard networks (SpaceWire, GigaSpaceWire, SpaceFibre, JRDDP, SpaceWire-R, RapidIO, STP). Current analysis resulted in the Flow Control...
The paper provides an overview of the second revision of the Transport protocol STP-ISS, which is developed for SpaceWire on-board networks. Current R&D activity is performed by the specialists of SUAI and JSC “ISS”. The paper shortly compares two revisions of the specification and describes the main mechanisms and quality of service types of the second revision of the protocol. STP-ISS is planned...
The paper describes two mechanisms which solve the problem of time multiplexing for SpaceWire networks. They are a transport-level scheduling mechanism, which is used in the STP-ISS protocol, and SpaceWire-DSUAI, that is a protocol prototype. The current paper presents an overview of these mechanisms and compares them. In addition, we provide a short analysis of time-division multiplexing in the communication...
SpaceWire is a data-handling network for spacecraft which combines simple, low-cost implementation, with high performance and architectural flexibility. SpaceWire is intended for data-handling applications but does not address such aspects of quality of service as robustness, determinism and durability that are essential requirements. Nowadays there is a number of transport protocols intended to operate...
The paper gives an overview and analysis of SpaceWire oriented transport protocols. Also this paper considers the “Academician M.F. Reshetnev” Information Satellite Systems” general requirements for the Transport protocol to operate over the SpaceWire network technology. Finally, we propose preliminary solutions for some Transport protocol mechanisms.
Modern and perspective highly capable on-board networks for scientific space missions require responsiveness, determinism, robustness and durability. The SpaceWire-RT research programme aims to create communications network technology, suitable for these fundamental requirements of demanding applications. The paper gives an overview of activities in the FP7 SpaceWire-RT project consisting in the development...
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