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NOAA CS V.2 Status Update and Certification Test Set Development Overview

This document provides an update on the status of NOAA's Certification Standards V.2 (CS V.2), including the preparation of a cover letter and the posting of CS V.2 on FedBizOps. It discusses ongoing development of Certification Test Sets and proposals for changes to CS V.2, most of which are positive. Additionally, it highlights filter coefficients provided by Microcom for use in Appendix C and implications for Wallops receivers. The document also outlines the potential for existing V.1B data capabilities to transition to V.2 with NOAA’s approval, noting bandwidth benefits and performance considerations.

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NOAA CS V.2 Status Update and Certification Test Set Development Overview

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  1. Certification Standards V.2 Peter Woolner Noblis May 20, 2009

  2. CS V.2 Status • NOAA has prepared a cover letter and will post CS V.2 on FedBizOps • Certification Test Sets in development • Several proposals raised to change CS V.2 • Most are positive but are not critical • I suggest it is not worth it to "rock the boat" • Microcom has provided the filter coefficients to go in Appendix C of CS V.2 • Apply to Wallops receivers and the Test Sets

  3. Filter Data • 427 Tap Root Raised Cosine FIR, Fs= 53.3333/Symbol • Equation: A = Σin ci∙si Coefficients will be listed from -213 to +213

  4. Impulse Response

  5. When CS V.2 DCPs are Available • Any existing V.1B 100 bps or 300 bps DCP could become a V.2 300 bps DCP on the same channel it currently uses if NOAA agrees • Uses the new channel bandwidth (1/2 existing) • Less interference to and from neighbors • Opens two halves of new channels for expansion • Small performance reduction unless neighbors do not meet V.1B requirements if power unchanged • Some V.1B 300 bps DCPs may be suitable

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