The SFODB is a standardized, gigabit per second, highly reliable, fault tolerant fiber optic network. SFODB was designed to the harsh space environments and real-time, on-board data handling applications of high speed, remote sensing spacecraft

Bretthauer, Joy W.

Chalfant, Chuck H.

Orlando, Fred J.

Rezek, Ed

Sawyer, Marc

English

NASA Technical Reports Server

Spaceborne Fiber Optic Data Bus (SFODB)
J. W. Bretthauer _, C.H. Chalfant b, F.J. Orlando ¢, E. Rezek d, M. Sawyer ¢
aNASA Goddard Space Flight Center, Code 561; Greenbelt, MD
bOptical Networks, Inc., Fayetteville, AR
COrlando & Associates, Melbourne, FL
dTRW, Redondo Beach, CA
eBroadband Communications Products (BCP), Melbourne, FL
The SFODB is a standardized, gigabit per second, highly reliable, fault tolerant fiber optic
network. SFODB was designed to the harsh space environments and real-time, on-
board data handling applications of high speed, remote sensing spacecraft.
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https://ntrs.nasa.gov/search.jsp?R=19980236697 2020-06-15T22:13:46+00:00Z
The jointly funded Department of Defense (DoD) and NASA Spaceborne Fiber Optic Data Bus
(SFODB) technology was scheduled for integration on NASA's Earth Orbiter 1 (EO-1) satellite.
The Science Advisory Team desires SFODB for its design flexibility and widespread
applicability to future MTPE missions. NASA's New Millennium Program leveraged off of
DoD's previous SFODB investment to flight validate and reduce non-recurring engineering for
future hyperspectral imaging and other high rate spacecraft applications. Industry partners
include TRW, Honeywell, Optical Networks, Broadband Communications Products, Orlando &
Associates.
The SFODB's one gigabit per second data transfer rate represents a thousand-fold data rate
increase over the flight proven 1773 fiber optic protocol. The IEEE P1393 SFODB implements a
doubly redundant, ring-based architecture which includes one controller node and up to 127
transmit/receive nodes. SFODB's low mass, low power, and reliable, high speed data transfer
rate makes it well-suited for hyperspectral imaging and other high speed applications. SFODB
was designed to support bit error rates less than 10-11 for non-solar flare and 10-9 for a
maximum solar flare. Its software configurable Asynchronous Transfer Mode (ATM) based
protocol provides users extraordinary flexibility when designing their data handling architectures.
The fiber optic cable consists of 100/140 micron, multimode graded index fiber. SFODB's
attributes combine to significantly reduce spacecraft development time and cost. The interaction
of SFODB's high performance, new technology components in the space radiation environment
requires flight validation. A flight validation would also serve to relieve any project manager's
reluctance in being the first to fly such a dynamic technology.
EO- 1 used SFODB to serve as a reliable, high rate, data transfer media between its science
instrumentsandtheWidebandAdvancedRecorderProcessor(WARP).TheAdvancedLand
Imager(ALl), theAtmosphericCorrector(AC),andtheHyperspectralImager(HSI)would
all interfacetheirrespectiveSFODBnodeandsimultaneouslytransmitdatato theWARP.
Teamworkwasessentialfor SFODB'sdevelopment.TheSFODBdevelopmentincludes:the
joint DoD/NASAfundingandtechnicalsupport;TRWandHoneywellinternalresearchand
developmenttoadvancethematurityof SFODB'scomponenttechnologies;Orlando&
Associatesconsultingservicesfor IEEEP1393compliance;OpticalNetworks'highspeed
opticaltransceivers;andBroadbandCommunicationsProductsengineeringsupportfor lowcost
groundsupportestcards.
Industrypartnerswill useSFODBor itscomponenttechnologiesbothin theirproductionlines
andin otherprograms.OpticalNetworkswill marketSFODBgroundsupportcardsandbuild
thehighspeedflight transmittersandreceivers.BroadbandCommunicationsProductplansto be
anOEMsupplierofthegroundsupportcards.TRWhasprogramswhichwill benefitfrom
SFODB'scombinedtechnologies.
Author(s)' Information:
Joy Bretthauer joy.bretthauer@gsfc.nasa.gov
NASA/GSFCCode 561; Greenbelt, MD 20771
(voice) 301-286-1050 (fax) 301-286-1719
Chuck Chalfant chalfant@comp.uark.edu (voice) 501-575-5316 (fax) 501-575-7446
c/o Optical Networks, Inc./Genesis; 700 West 20 th Street; Fayetteville, AR 72701
Fred Orlando fjorlando@earthlink.net (voice) 407-951-3983 (fax) 407-951-3983
Orlando & Associates; 180 Bry-Lynn Drive; West Melbourne, FL 32904
Ed Rezek e.rezek@ieee.or 8 (voice) 310-814-1860 (fax)
TRW; S 1351; One Space Park; Redondo Beach, CA 90278
Marc Sawyer msawyer@bcpinc.com (voice) 407-984-3671 (fax) 407-728-0487
c/o BCP; 305 East Drive; Melbourne, FL 32904


Spaceborne Fiber Optic Data Bus (SFODB)

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