[Ovmsdev] Locations and scripts

[Greg D.]

Hmmpf.

Precession of the GPS constellation, perhaps?  Folks in northern Nevada
or Idaho should be next...

Greg


Stephen Casner wrote:
> Greg,
>
> Mine has been quiet for the past couple of months without increasing
> the alarm distance beyond the default 500 meters.
>
>                                                         -- Steve
>
> On Wed, 21 Aug 2019, Greg D. wrote:
>
>> A quick follow-up to this thread...
>>
>> I've noticed that since this past spring that the number of false alerts regarding the
>> flatbedding of my Roadster have taken a sharp spike upward. Neither my car's normal
>> parking spot in the garage, nor the location of my house / garage have changed. The
>> difference in frequency did not appear to coincide with a firmware update, so I'm at a
>> bit of a loss to explain it.
>>
>> Has anyone else noticed this?
>>
>> Did the Government make a change to the GPS satellite fleet?
>>
>> Not an issue, really, but definitely something odd going on.
>>
>> Greg
>>
>>
>> Stephen Casner wrote:
>>
>> Greg,
>>
>> Attached are graphs of your data.  gregd.all.png shows all of the
>> data, and gregd.peak.png is the highest distance deviation of 369
>> meters, which is less than the default 500 meter threshold.
>>
>> It looks like there is a diurnal pattern to the data with increased
>> deviations around midnight local time (the X axis times are UTC).
>>
>> It also looks like your home elevation must be about 380 meters since
>> the altitude variable drops down to negative that amount frequently,
>> which would occur when that value is taken as zero (there is a special
>> case in the code to treat some values as zero).
>>
>> I tried overlaying my data and yours, but there seems to be no
>> correlation between the peaks in my data and the peaks in yours.
>> Interestingly, my data does not show a similar diurnal pattern.
>>
>>                                                         -- Steve
>>
>> On Tue, 4 Jun 2019, Greg D. wrote:
>>
>> 200mb of logs sent to Steve for analysis....
>>
>> Greg
>>
>>
>> Stephen Casner wrote:
>>
>> Thanks.  For me, today's log was much quieter.  The maximum excursion
>> was 115 meters and it was roughly coincident with loss of lock.
>>
>>                                                         -- Steve
>>
>> On Fri, 31 May 2019, Greg D wrote:
>>
>> Ok.  I'll let it run for a few days and see what happens. Not planning to drive the ca
>> r until next week.
>>
>> Greg
>>
>>
>> On May 31, 2019 2:11:31 PM PDT, Stephen Casner <casner at acm.org> wrote:
>>
>> On Fri, 31 May 2019, Greg D. wrote:
>>
>> Tried this, and am not getting anything written to the file system
>>
>> (vfs
>>
>> ls /sd shows zero bytes in gps.crtd).  Did I miss some sort of setup
>>
>> step?
>>
>> Nothing gets written (or at least the file size as reported is not
>> updated) until the recording is stopped with "can log off".
>>
>>                                                        -- Steve
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