Question

Greetings.

I would like to use HDOP measurements sent by device, but the description of corresponding data field (e.g. ID 182 for FMB-series) is a bit confusing.
I expect the field to contain numbers of magnitude 1-20, like it's described here. So, my Teltonika device sent raw values 4, 6, 3 for "GNSS HDOP" (herewith number of satellites was 10, 14, 17). If I divide these numbers by 10, like it's written in the description of AVL, results will be less than 1. What's wrong here, the description (regarding multiplier)? Maybe the numbers represent not really DOP, but some other parameter? What does that single word "Probability" from description mean?

Thanks for your help.

Answer 1

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Comments

Thank you for answering.

After collecting some statistics, I came to the conclusion that everything works as described in the documentation.
Namely, 1) raw HDOP data (AVL ID 182) should be divided by 10,
2) these data can be assessed by the levels from the Wikipedia article (i.e. <3 is bad level, 3-10 is normal level),
3) HDOP less than 1 is a valid value.

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so if i got 9 (in AVL 182) .. it is = .9
then i go to the levels from the wikipedia article  and because is lower than 1 that means it is in the Ideal Rating right?
 so u can consider for Geolocation purposes data < 3 is Very good level, idk why you said "data < 3 is bad level"  it confuses me a little