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October 2004

Departments

Publisher's Notebook
Using the Word "Irrespective" Twice


The Inside Track


COTS Products


Editorial
In Defense of Standards Bodies


Features

Hardware Assets


Military DC/DC Converters Eye Distributed Power
Jeff Child

Spec Keeps COTS Power Supplies Up to Snuff
Bryan Kellogg, Director of Engineering, Rantec Power Systems

Consistent performance metrics have long been lacking in the commercial power supply world. The IEEE 1515-2000 standard helps out by providing a common language for specifying power supply performance for military applications.

On the Softer Side
POS/NAV/GPS and Precision Timing

Does Anybody Really Know What Time It Is?
Bruce Bromage, Executive Vice President, Symmetricom Timing, Test and Measurement Division

You’ll be surprised at the differences between GPS, UTC and TAI time.

Mitigating GPS Vulnerabilities
Heinz Badura, FEI-Zyfer

GPS is deceptively easy to rely on in our contemporary technical infrastructure, but what happens when a signal is lost—or worse—jammed? Fortunately there are workarounds to its vulnerabilities in military and civilian applications.

Special Feature
Software Radios and JTRS Are Getting Closer; An Update Part 2

Cognitive Radio Shows Great Promise
Dr. Bruce Fette, Senior Scientist, General Dynamics C4 Systems

With roots in today’s SDR technology, cognitive radios offer the next level of software radio functionality. As regulatory hurdles diminish, such radios are moving closer to reality.

SCA Framework Puts a CORBA Face on FPGAs
Liana Land, Field Applications Engineer, Spectrum Signal Processing

FPGAs are an enabling technology for software radios. But marrying their I/O interfaces to CORBA standard platforms raises some thorny porting issues.

Technology Focus
Conduction-Cooled cPCI

Future Bright for CompactPCI in the Military
Jeff Child

With proven longevity, a performance upgrade path, and a wide infrastructure of products—including conduction-cooled ones—CompactPCI passes muster for military use.

Conduction-Cooled cPCI Boards Gallery

Avionics/Vetronics Cooling Options: A Systems View
James Robles, Senior Technical Fellow, The Boeing Company, and Ivan Straznicky, Senior Staff Mechanical Engineer, Curtiss-Wright Controls Embedded Computing

Conduction-cooling and air flow-through cooling used to be the only options for managing heat in harsh environments. Today new alternatives are gaining support.

COTS View

Chat and Collaborate With Me: On-Line DCTS Certification, Levels and Requirements
David Bundy, Chief Technology Officer, First Virtual Communications

Did you know that instant messaging and on-line net meetings now have a military mandate? Here’s an objective look at the three levels of collaboration tool suite interoperability testing, along with their significance to the buying decision for collaboration products.

Unlock Engineering Data and Give Soldiers Embedded Training and Maintenance Skills
Mark Thomas, President and Founder, Right Hemisphere

Complex military systems are a reality for military personnel. Providing the supportability tools and information they need to ensure the success of the mission requires new ways of transferring knowledge from the design team out to the field.

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