From: "Brian, Geoff" <suppressed> To: simstds@LARC.NASA.GOV Subject: Units of Measure for use in MathML datasets Date: Fri, 17 Dec 2004 12:14:04 +1100 Hi all, I noticed in the DAVEML reference that the issue of unitsofmeasure notation is still to be finalised. I have been looking at this for our flight dynamic / simulation modelling here in DSTO, and have found that a number of the proposed standards have conflicting information for units of measure, both between standards and within individual standards. As a result, I have prepared a list of units of measure for use with aircraft modelling here in DSTO (see attached). A difference I have adopted from general conventions is the use of negative powers to represent divisor units irrespective of whether the unit of measure is metric or imperial (eg. ft s1 instead of ft/s). I have found this is simpler when defining something like ft s2 instead of ft/s/s or ft/s2. I thought that this might be useful as a starting point for defining a unitsofmeasure notation for DaveML and welcome any comments. The references I have used for compiling the list were: "Standards for the Exchange of Simulation Modeling Data", Preliminary Draft, 9 June 1997, AIAA Modeling and Simulation Technical Committee. "SI Units Dimensional Analysis &, Chapter 8 Figure  Conversion Tables", McMahonlines, MathTech Reference Series. http://www.unc.edu/~rowlett/units/index.html hope you are having an enjoyable lead up to the end of the year. Regards Mr Geoff Brian Aircraft Flight Dynamics and Performance Engineer. Air Vehicles Division, Defence Science and Technology Organisation. Ph. (03) 9626 7318, Fax (03) 9626 7085. email: <suppressed> Attachment converted: FltSysUnitStandard.html (TEXT/ÇICÈ) (006F1233)
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