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ETTC'2003 - SEE

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The file structure is also adopted from 4575 as this facilitates host computing platform<br />

independence and commonality. The file structure does not define how data is physically<br />

stored on the recording media but provides a standardised method for access of stored<br />

data at the interface. For IRIG time synchronised formats a decision was made to add an<br />

optional relative time packet to the packet header and to each data packet.<br />

The STANAG 4575 declassification procedure has been incorporated in its entirety. This<br />

procedure has been established with vendors in co-operation with government security<br />

agencies. The U.S. National Security Agency has endorsed STANAG 4575 Annex F,<br />

advanced memory system de-classification and sanitisation guidance, for use as interim<br />

guidance. The RCC has an action to verify Annex F and compare to chapter 10’s declassification<br />

procedure.<br />

• TG - 63 Telemetry networks<br />

Continuing discussion/ activity – RCC Vehicular Instrumentation Committee lead on this<br />

task.<br />

• Telemetry attributes transfer standard - TMATS<br />

The U.S. Ranges use TMATS to record and build the data structures needed to load test<br />

data systems and configure ground stations. The RCC is investigating the inclusion of<br />

vendor specific telemetry device attributes, without which TMATS will only be a partial<br />

solution.<br />

• Disc based recorder study<br />

The RCC has been requested to provide some guidelines in this area and promote<br />

interoperability. A study of file formats and system architectures is being proposed.<br />

Summary<br />

From the above, and recent telemetry conference proceedings, it is clear that formulating<br />

standards in this rapidly changing field is problematical, albeit the need for data<br />

interchange standards remains as convincing now than ever. The long gestation time<br />

associated with developing Industry standards frequently results in the users having<br />

already made strategic equipment procurement decisions, which inevitably promotes the<br />

proliferation of recording formats.<br />

With the increasing use of distributed computing and networks within telemetry<br />

applications, the data interchange standard is increasingly being defined in terms of the<br />

logical format rather than the physical recording medium.<br />

Acknowledgements<br />

The author acknowledges the contribution of Joe Lloyd, Chairman, recorder and<br />

reproducer committee, Telemetry Group, Range Commanders Council for providing<br />

updates concerning the various RCC tasks.

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