Spaceflight qualification of the SEDS MIL-STD-1773 fiber optic data bus

Mark C. Flanegan

doi:10.1117/12.156593

15 September 1993 Spaceflight qualification of the SEDS MIL-STD-1773 fiber optic data bus

Mark C. Flanegan

Proceedings Volume 1953, Photonics for Space Environments; (1993) https://doi.org/10.1117/12.156593
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

Abstract

The small explorer (SMEX) project at Goddard Space Flight Center (GSFC) launched the first spaceflight implementation of the MIL-STD-1773 fiber optic data bus on the Solar Anomalous Magnetospheric Particle Explorer (SAMPEX) in July of 1992. The Small Explorer Data System (SEDS), of which the MIL-STD-1773 data bus is a part, has been successful. The MIL-STD-1773 bus is the implementation of the MIL-STD-1553 protocol using fiber optics. Advantages of the fiber optic bus over the electrical bus include lower power, lower weight, and immunity from EMI/RFI. It does not radiate electrical or magnetic fields. It is a nonconductor so it cannot conduct electrical noise into or from a subsystem. This is particularly advantageous on a spacecraft with very sensitive instruments which are often susceptible to electrical interference. Although the MIL-STD-1773 bus is a 1 Mbps bus like the MIL-STD-1553 bus, the fiber optics also provide a path to the much higher rate systems required in upcoming NASA missions.

Citation Download Citation

Mark C. Flanegan "Spaceflight qualification of the SEDS MIL-STD-1773 fiber optic data bus", Proc. SPIE 1953, Photonics for Space Environments, (15 September 1993); https://doi.org/10.1117/12.156593

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