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Questions tagged [nmea]

National Marine Electronics Association (NMEA)

The National Marine Electronics Association, founded as an association earlier in 1957, was later incorporated in 1969.

To cite its current mission statement:

(NMEA) is the unifying force behind the entire marine electronics industry, bringing together all aspects of the industry for the betterment of all in our business.

It sets out combined electrical and data specification for communication between various marine electronic devices.

  • NMEA 0183 is the widespread standard superseding the earlier NMEA 0180 and NMEA 0182 standards.
  • NMEA 2000 is the latest standard.

The NMEA is a proprietary standard.

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Android : Samsung Galaxy Tabs and Android 2.2 Devices Showing GPS date 1 Day Advance from 1st jan 2012

I have the Galaxy tab GT-P1000 7 inch with firmware version 2.3.3 and Phones running Android 2.2. In both versions when ever I am trying to get the time from GPS, its showing 1 day advance from 1st jan 2012. Same code is working fine on Samsung, LG…
Shashi kant Singh
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How can I get the GPS raw data (satellites pseudo range)?

How can I read GPS raw data, to be more specific I need the saellites pseudo range. This data is not available in NMEA format.
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Parsing GPS receiver output via regex in Python

I have a friend who is finishing up his masters degree in aerospace engineering. For his final project, he is on a small team tasked with writing a program for tracking weather balloons, rockets and satellites. The program receives input from a GPS…
crashsystems
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How to calculate gps accuracy in meters from nmea sentence information

I have android app that gets GPGGA and GPRMC sentences form bluetooth gps receiver, how to calculate horizontal accuracy of given position with in meters?
Alpha
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Roll your own NMEA parser or use an open source GPS parser?

I do a lot of location aware computing, often incorporating GPS. I have my own little simple NMEA parser that doesn't do anything special - just transforms the GPS specific sentences into usable numbers, flags, and so forth. However, there is a lot…
Adam Davis
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C# open source NMEA parser

Am looking for C# open source NMEA parser.
gil
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How to convert latitude and longitude of NMEA format data to decimal?

I have latitude and longitude of NMEA format, and I want to convert it into decimal value. Is there any formula? For example, NMEA format Latitude = 35.15 N and Longitude = 12849.52 E
NajLinus
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NMEA checksum calculation calculation

I am trying to find checksum for NMEA sentence which is already calculated by GPS. char GPRMCBuf[POS_BUFFER] = {0xA0, 0xA2, 0x00, 0x48, 0xDD, 0x24, 0x47, 0x50, 0x52, 0x4D, 0x43, 0x2C, 0x31, 0x35, 0x30, 0x35, 0x32, 0x30, 0x2E, 0x30, 0x30,…
Deep Gadhia
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NMEA checksum calculation

I have a problem with calculating the checksum for NMEA sentences. I am using the following java code: private static String getSum(String in) { int checksum = 0; if (in.startsWith("$")) { in = in.substring(1, in.length()); } …
htz
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NMEA (GPS) sentence to a map location

I'm having a hard time understanding how to see on a map the location given to me by some location NMEA sentence: foe example: given the sentence $GPRMC,225446,A,4916.45,N,12311.12,W,000.5,054.7,191194,020.3,E*68 where and what information do I…
kakush
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Which NMEA sentence should I use

The GPS I am using outputs multiple NMEA sentences which I can use for positional data. (GPGGA and GPRMC). Is there a reason I should use one over the other? Should I check them both and compare the data? Can I just pick one to use arbitrarily? At…
PTBG
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Looking for Robust Delphi NMEA parser

I'm looking for opensource Delphi NMEA parser of production grade. It will be fine if it can meet critical mission requirement (I'm joking! I believe it's not attainable using a Win32 system). So far, I have played around with basic interfacing of…
menjaraz
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GPS Time synchronisation

I'm parsing NMEA GPS data from a device which sends timestamps without milliseconds. As far as I heard, these devices will use a specific trigger point on when they send the sentence with the .000 timestamp - afaik the $ in the GGA sentence. So I'm…
VolkA
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GPS Signal Strength Calculation

I want to display a signal bar for a GPS device using .NET CF. I'm able to read NMEA data and get the SNR signals. But they are a number of satellites with some active and some inactive with various SNRs. I thought about getting average of total SNR…
VOX
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Building AIS Messages Decoder

I used to decode AIS messages with theis package (Python) https://github.com/schwehr/noaadata/tree/master/ais until I started getting a new format of the messages. As you may know, AIS messages come in two types mostly. one part (one message) or…
Shad
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