GPS Position

[Philip1969]

Hello,

I need to convert a RS232 string to decode a GPS position according to LIP/ETSI format;

The Longtitude is 25 bits and latitude is 24 bits

I have problems splitting up the string and converting the latitude and longtitude;

The Hex string looks like this;0A00311D4A4DBAF900A810

as attachment the protocol description

Can anybody help>?

Regards,Philip

[mikeporter]

It looks like you have a well-documented protocol. What is it that you need help doing?

Mike...

[Philip1969]

Hello Mike,

Thanks for the reply, i need help on the latitude and longtitude,i tried different ways to extract the 25 bits and convert it to a number but get a strange value.

I also do not know how to calculate the value with the 360 2 25 method.

I am a electronics engineer with little knowledge about Labview and programming ,i got the RS232 working to send and receive commands but got stuck on this part.

Regards,

Philip

[LJ00]

Hi Philip,

In fact, the document you have regarding LIP string is probably more useful than ETSI standard document (the one I have).

Can you show us the decimal numbers for LON / LAT?

Maybe it´s just a problem of conversion to the appropriate scale.

Regards

Luis

[JayPinder]

Looks like this message was abandoned before a solution was found and unfortunately, I need the same thing done.

I have received the following data that is to be decoded using ETSI/LIP and don't know how to do it. I too am receiving hex data that I want to convert to decimal.

I've converted the

LONG:0110011100110110010011000  or in hex: 67 36 4C 00    (25 bits)

LAT:110010100001100101011001 or in hex: CA 19 59      (24 bits)

The above converts into this somehow (Taken from a logging program);

0110011100110110010011000 Longitude = 0x0CE6C98 (145.142012)

110010100001100101011001 Latitude = 0xCA1959 (-37.899131)

Does anyone have any idea how I go about converting the binary/hex to decimal using ETSI LIP?

[mikeporter]

This is a 2-year old thread, you should repost a new question referenceing tis thread.

Mike...

[JayPinder]

Thanks - I have done this.