Ask a question

1420 questions

1679 answers

1403 comments

4234 members

Ask a question
0 votes
37 views
in Vehicle tracking by
I have checked the data sheets but I cannot find if the TM2500 modules uses doppler shift to determine speed or if it uses GPS location and time to calculate speed. Can anybody provide links to documentation that answers this? Thanks

2 Answers

0 votes
ago by

Hello,

You can find in it in our codec protocols:

Speed – speed calculated from satellites.

Note: Speed will be 0x0000 if GPS data is invalid.

https://wiki.teltonika-gps.com/view/Teltonika_AVL_Protocols#Codec_8

Regards,

Teltonika Support.

ago by
Hi - Thanks for replying but that doesn't address the question.

There are two common methods by which speed can be calculated using GPS;

1) Using the doppler shift

2) Calculating the distance between to points and the time taken to travel between them.

The codec protocols don't say which method is used, just the it's calculated using GPS (both of the above fit that statement).

Can Teltonika please confirm which of the methods is used, and support this with some form of documentation eg the tech sheet for the GPS chip.

Thanks
0 votes
ago by
Hi - Thanks for replying but that doesn't address the question.

There are two common methods by which speed can be calculated using GPS;

1) Using the doppler shift

2) Calculating the distance between to points and the time taken to travel between them.

The codec protocols don't say which method is used, just the it's calculated using GPS (both of the above fit that statement).

Can Teltonika please confirm which of the methods is used, and support this with some form of documentation eg the tech sheet for the GPS chip.

Thanks