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Implausible Time Records
Not necessarily related, but I noticed that your Firmware is dated
10-Feb-2017. I feel sure that there have been updates since then. At 15:08 06 May 2019, Dan Marotta wrote: Yes, the GPS jamming usually centers around Alamogordo and ranges out to about 400 nm.Â* Moriarty is well within that area.Â* I've asked other local pilots and they don't report so many drop outs. Maybe there are just too many GPS antennae in my ship.Â* I'll take a look at a divider for everything except the ADS-B WAAS GPS.Â* Its antenna is mounted aft of the engine in the Stemme.Â* The rest are on or under the glare shield. On 5/5/2019 7:42 PM, JS wrote: On Sunday, May 5, 2019 at 3:43:24 PM UTC-7, Dan Marotta wrote: Thanks Tim I'll increase my time interval to 2 seconds and see if that helps. Strange that the igc file does not show GPS drop outs since my ClearNav screen went white with the caption (something like) No GPS.Â* Zero satellites.Â* And the ClearNav vario said, "Warning no GPS".Â* The PowerFlarm portable screen also went blank with a "Zero satellites" message. On 5/5/2019 1:05 PM, Tim Newport-Peace wrote: Dan, Open your file with a text editor and search for "B190338" This will put you in the right area. In each record, after the letter B, the next six bytes are the time. After B190339 the time jumps back to B190337, which is odd, and leads to there being two records with a time of 190338, and also 190339. Odd, but I have seen this before. Maybe you can avoid it in future by setting a longer fix interval, even 2 seconds might help, but no promises. I am not seeing any GPS outage around that time. This would be shown by the Letter "A" in the 25th byte changing to a "V". Although it does not help a lot, the sequence error seems to happen as you left the ground, so I guess you were not reversing turns? I'm not saying this is what OLC are complaining about, just that it is odd and it might be. Tim. -- Dan, 5J That smells of GPS jamming. Check this page. https://www.navcen.uscg.gov/pdf/gps/...terference.pdf I did not have a problem with the vario file today. My antenna has a shortened cable to a MECA divider, then a short SMA-SMA link cable. Jim -- Dan, 5J |
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