Nit-picky issue:<br><br><a href="http://en.wikipedia.org/wiki/Two-line_elements">http://en.wikipedia.org/wiki/Two-line_elements</a> says that the code is for<br>use with the SGP4 model.<br><br><a href="http://en.wikipedia.org/wiki/SGP4">http://en.wikipedia.org/wiki/SGP4</a> says that this is for orbital times less than<br>
225 minutes should use this model (m225 in keith-speak), and that model<br>SDP4 ( <a href="http://en.wikipedia.org/wiki/SDP4">http://en.wikipedia.org/wiki/SDP4</a> ) should be used for orbital times<br>> m225. The SDP4 article also says, however,<br>
<br><blockquote style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;" class="gmail_quote">Most newer software implementations have merged SGP4 and SDP4<br>in to a single code base, and generally just refer to both just as 'SGP4'.<br>
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It appears to me that some clarification is on order if we are looking at<br>m228.<br><br>- tony<br>