Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 17-04-2017, 03:50   #1
Registered User

Join Date: Feb 2012
Location: Austria
Posts: 320
SOG from GPS

I am using OCPN 4.6.1 and tried last cruise to use the logbook plugin with the automatic timer, auto distance and auto course triggers set.

Made following observations which I am not sure if its a bug or just some settings I missed to adjust:

1. SOG data come from GPS and show a ever changing value of 0.01 - 0.3 kt even when not moving!(Have now verified thsi also when at home on land) Sounds to me like no damping is on the calculation from the coordinate changes.

2. When I loose the GPS signal a 00.00.00 coordinate pair is received and in the logbook this gets interpreted as some useless distance traveled. When correct signal returns same value is again added to the log.
Has anyone else observed this behavior? - I think it is a bug in the calculation of the distance traveled, as obviously useless coordinate pairs should be ignored. (I shall try to attach a screenshot)

3. I noticed the option to hold many crew members and have only the onboard ones visible. Would be nice to have also many boats in some database/file. Also for the crew list an entry for skipper license nr etc and SRC details owuld be great as in Europe such data are typically required - shall I add this 2 requirements as a feature request?

Ahoi
Attached Thumbnails
Click image for larger version

Name:	Screenshot (2)_LI.jpg
Views:	122
Size:	318.1 KB
ID:	145532  
skipperearly is offline   Reply With Quote
Old 18-04-2017, 04:45   #2
Registered User

Join Date: Nov 2014
Location: Netherlands
Posts: 219
Re: SOG from GPS

Quote:
Originally Posted by skipperearly View Post
I am using OCPN 4.6.1 and tried last cruise to use the logbook plugin with the automatic timer, auto distance and auto course triggers set.

Made following observations which I am not sure if its a bug or just some settings I missed to adjust:

1. SOG data come from GPS and show a ever changing value of 0.01 - 0.3 kt even when not moving!(Have now verified thsi also when at home on land) Sounds to me like no damping is on the calculation from the coordinate changes.

2. When I loose the GPS signal a 00.00.00 coordinate pair is received and in the logbook this gets interpreted as some useless distance traveled. When correct signal returns same value is again added to the log.
Has anyone else observed this behavior? - I think it is a bug in the calculation of the distance traveled, as obviously useless coordinate pairs should be ignored. (I shall try to attach a screenshot)

3. I noticed the option to hold many crew members and have only the onboard ones visible. Would be nice to have also many boats in some database/file. Also for the crew list an entry for skipper license nr etc and SRC details owuld be great as in Europe such data are typically required - shall I add this 2 requirements as a feature request?

Ahoi
For point 2 you can easily delete the row with the 0's position. It will auto recalculate the distances.

For point 3 you can open a feature request if you want.

Peter
ptulp is offline   Reply With Quote
Old 18-04-2017, 08:07   #3
Registered User

Join Date: Feb 2012
Location: Austria
Posts: 320
Re: SOG from GPS

@Peter: Thanks for help, didnt know that the mileage gets recalculated.
However there is still something strange in the auto entries, as the trigger >10nm was invoked but distance is only 0,01 ???
Also on 00:00:00 coordinate pairs a speed is recorded but on other pairs not.

Is this behavior only on my setup ? Can anyone using the autolog functions please confirm.
Attached Thumbnails
Click image for larger version

Name:	Screenshot (5)_LI.jpg
Views:	88
Size:	317.2 KB
ID:	145711  
skipperearly is offline   Reply With Quote
Reply

Tags
gps


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
GPS- Minimum SOG for COG ? piluso Marine Electronics 6 09-04-2015 18:44
AIS - cog/sog or boat/heading? AllezCat Marine Electronics 14 07-06-2012 08:20
No COG, SOG JF2 OpenCPN 11 07-04-2012 21:12
Why Doesn't OpenCPN Send SOG to Autopilot RhythmDoctor OpenCPN 19 01-07-2011 00:17
Log Speed vs GPS [SOG] Speed? Sandyh Navigation 57 07-06-2009 22:22

Advertise Here


All times are GMT -7. The time now is 17:23.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.