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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>I meant to attach a different file but the one I’m sending this email definitely has examples of what I described.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>As far as why the file formats are so different, I can only speculate that the different records were designed at different times by different people and / or that the level of programming experience and sophistication increased over time. I have noticed, for example, that while the older (lower-numbered) records often contained fixed-length fields in the payload that would be difficult to expand without affecting parsing logic, the newer / higher-numbered records are more likely to have a field length prefix included in the payload that provides greater flexibility (“future proofing”, you might say). So it seems to me that either the people designing these records have gotten smarter over time, or DJI has hired programmers with more experience and sophistication who chose to use more efficient and industry-standard ways of storing data.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> DJI-log-discuss [mailto:dji-log-discuss-bounces@us.live555.com] <b>On Behalf Of </b>Chris<br><b>Sent:</b> Monday, January 27, 2020 12:48 AM<br><b>To:</b> Discussion of DJI's log file formats<br><b>Subject:</b> Re: [DJI-log-discuss] RC_GPS record format<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p>For the Flight records i have that seems not to match.<o:p></o:p></p><p>I would also wonder why all formats in this are completely different to the seens time and lat/lon formats.<o:p></o:p></p><div><p class=MsoNormal>Am 27.01.20 um 03:49 schrieb Brett Spell:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>Ross,<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Here’s what I believe to be the format of the RC_GPS (type 11) record found on older models, and I’ve also attached a TXT that includes instances of the record. Note that the first six fields represent a “Startup timestamp” field that’s a bit funky in that it doesn’t use epoch milliseconds (or seconds) to represent a date / time value and is local to GMT.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Brett<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>P.S. I’ve also seen the record present but with all zeroes for the field values.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 style='border-collapse:collapse'><tr><td width=82 valign=top style='width:49.2pt;border:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal><b>Offset</b><o:p></o:p></p></td><td width=90 valign=top style='width:.75in;border:solid windowtext 1.0pt;border-left:none;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal><b>Length</b><o:p></o:p></p></td><td width=143 valign=top style='width:85.5pt;border:solid windowtext 1.0pt;border-left:none;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal><b>Type</b><o:p></o:p></p></td><td width=218 valign=top style='width:130.5pt;border:solid windowtext 1.0pt;border-left:none;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal><b>Units</b><o:p></o:p></p></td><td width=225 valign=top style='width:135.0pt;border:solid windowtext 1.0pt;border-left:none;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal><b>Description</b><o:p></o:p></p></td></tr><tr><td width=82 valign=top style='width:49.2pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>0<o:p></o:p></p></td><td width=90 valign=top style='width:.75in;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>1<o:p></o:p></p></td><td width=143 valign=top style='width:85.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Unsigned integer<o:p></o:p></p></td><td width=218 valign=top style='width:130.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Hours<o:p></o:p></p></td><td width=225 valign=top style='width:135.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Hour of day (0-23)<o:p></o:p></p></td></tr><tr><td width=82 valign=top style='width:49.2pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>1<o:p></o:p></p></td><td width=90 valign=top style='width:.75in;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>1<o:p></o:p></p></td><td width=143 valign=top style='width:85.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Unsigned integer<o:p></o:p></p></td><td width=218 valign=top style='width:130.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Minutes<o:p></o:p></p></td><td width=225 valign=top style='width:135.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Minute (0-59)<o:p></o:p></p></td></tr><tr><td width=82 valign=top style='width:49.2pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>2<o:p></o:p></p></td><td width=90 valign=top style='width:.75in;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>1<o:p></o:p></p></td><td width=143 valign=top style='width:85.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Unsigned integer<o:p></o:p></p></td><td width=218 valign=top style='width:130.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Seconds<o:p></o:p></p></td><td width=225 valign=top style='width:135.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Second (0-59)<o:p></o:p></p></td></tr><tr><td width=82 valign=top style='width:49.2pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>3<o:p></o:p></p></td><td width=90 valign=top style='width:.75in;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>2<o:p></o:p></p></td><td width=143 valign=top style='width:85.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Unsigned integer<o:p></o:p></p></td><td width=218 valign=top style='width:130.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Year<o:p></o:p></p></td><td width=225 valign=top style='width:135.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>e.g., 2020<o:p></o:p></p></td></tr><tr><td width=82 valign=top style='width:49.2pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>5<o:p></o:p></p></td><td width=90 valign=top style='width:.75in;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>1<o:p></o:p></p></td><td width=143 valign=top style='width:85.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Unsigned integer<o:p></o:p></p></td><td width=218 valign=top style='width:130.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Month<o:p></o:p></p></td><td width=225 valign=top style='width:135.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Month (1-12)<o:p></o:p></p></td></tr><tr><td width=82 valign=top style='width:49.2pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>6<o:p></o:p></p></td><td width=90 valign=top style='width:.75in;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>1<o:p></o:p></p></td><td width=143 valign=top style='width:85.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Unsigned integer<o:p></o:p></p></td><td width=218 valign=top style='width:130.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Date<o:p></o:p></p></td><td width=225 valign=top style='width:135.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Date (1-31)<o:p></o:p></p></td></tr><tr><td width=82 valign=top style='width:49.2pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>7<o:p></o:p></p></td><td width=90 valign=top style='width:.75in;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>4<o:p></o:p></p></td><td width=143 valign=top style='width:85.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Signed integer<o:p></o:p></p></td><td width=218 valign=top style='width:130.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Degrees * 10000000<o:p></o:p></p></td><td width=225 valign=top style='width:135.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Latitude<o:p></o:p></p></td></tr><tr><td width=82 valign=top style='width:49.2pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>11<o:p></o:p></p></td><td width=90 valign=top style='width:.75in;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>4<o:p></o:p></p></td><td width=143 valign=top style='width:85.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Signed integer<o:p></o:p></p></td><td width=218 valign=top style='width:130.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Degrees * 10000000<o:p></o:p></p></td><td width=225 valign=top style='width:135.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Longitude<o:p></o:p></p></td></tr><tr><td width=82 valign=top style='width:49.2pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>15<o:p></o:p></p></td><td width=90 valign=top style='width:.75in;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>4<o:p></o:p></p></td><td width=143 valign=top style='width:85.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Signed integer<o:p></o:p></p></td><td width=218 valign=top style='width:130.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Millimeters per second<o:p></o:p></p></td><td width=225 valign=top style='width:135.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>East / west velocity<o:p></o:p></p></td></tr><tr><td width=82 valign=top style='width:49.2pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>19<o:p></o:p></p></td><td width=90 valign=top style='width:.75in;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>4<o:p></o:p></p></td><td width=143 valign=top style='width:85.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Signed integer<o:p></o:p></p></td><td width=218 valign=top style='width:130.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Millimeters per second<o:p></o:p></p></td><td width=225 valign=top style='width:135.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>North / south velocity<o:p></o:p></p></td></tr><tr><td width=82 valign=top style='width:49.2pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>23<o:p></o:p></p></td><td width=90 valign=top style='width:.75in;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>1<o:p></o:p></p></td><td width=143 valign=top style='width:85.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Unsigned integer<o:p></o:p></p></td><td width=218 valign=top style='width:130.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Integer<o:p></o:p></p></td><td width=225 valign=top style='width:135.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Satellite count<o:p></o:p></p></td></tr><tr><td width=82 valign=top style='width:49.2pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>24<o:p></o:p></p></td><td width=90 valign=top style='width:.75in;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>4<o:p></o:p></p></td><td width=143 valign=top style='width:85.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Float<o:p></o:p></p></td><td width=218 valign=top style='width:130.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>?<o:p></o:p></p></td><td width=225 valign=top style='width:135.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>“Accuracy”?<o:p></o:p></p></td></tr><tr><td width=82 valign=top style='width:49.2pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>28<o:p></o:p></p></td><td width=90 valign=top style='width:.75in;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>1<o:p></o:p></p></td><td width=143 valign=top style='width:85.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Unsigned integer<o:p></o:p></p></td><td width=218 valign=top style='width:130.5pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>Enumeration (?)<o:p></o:p></p></td><td width=225 valign=top style='width:135.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'><p class=MsoNormal>“Status”?<o:p></o:p></p></td></tr></table><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br><br><o:p></o:p></span></p></blockquote></div></body></html>