stands for Global Positioning System, a satellite based navigation system

learn more… | top users | synonyms

0
votes
0answers
35 views

Isolation between GSM and GPS antenna

We are doing a prototype for a gps based tracker. We got a problem in placing the GSM and GPS antenna. Both the GSM and GPS antenna are omni-directional antennas. In forums and application notes, the ...
-4
votes
2answers
60 views

GPS data meaning

I got this data from GPS module. $GPRMC,235316.000,A,4003.9040,N,10512.5792,W,0.09,144.75,141112,,*19 $GPGGA,235317.000,4003.9039,N,10512.5793,W,1,08,1.6,1577.9,M,-20.7,M,,0000*5F What is the ...
0
votes
0answers
43 views

Low Accuracy GPS/Low Detection (e.g. detect country or state)

I'm making something to go with an electronic compass so I can always point to a certain (non-true north) location. To do this, I want to detect what state the user is in, and look up an approximate ...
2
votes
2answers
56 views

Inductor burning out in a GPS bias tee circuit

I've got a tracking device that uses a Telit GE864-GPS combined GSM/GPS module. The GPS antenna is connected to the Telit module via a bias tee circuit, as shown below: ...
0
votes
1answer
40 views

10 MHz frequency standard input

Many sampled data systems accept a 10 MHz frequency standard. I'm designing a sampled data system, and would like to include the ability to lock to an external clock reference. I've seen many ...
1
vote
2answers
84 views

Does an antenna work inside a plastic box

I need to put two antennas for GSM and GPS communication on my PCB. My final product will be embedded in a user-friendly plastic box with buttons, leds and switches. I have not choosed yet which type ...
0
votes
0answers
49 views

Easy-to-use Antennas for beginners

I am designing an embedded system with a GPS and a GSM modules both from the u-blox company. I need external antennas for my GSM and GPS modules. From what I see when I looked for antenna integration ...
0
votes
0answers
59 views

Material that Degrade GPS Signal Reception

Between clear tempered glass (see through,thick & very strong) Vs. coloured plastic material, which would result in more degradation of GPS signals if used to make a box? The box contains a ...
1
vote
2answers
105 views

Use of the GPS 1PPS feature in a system

I'd like to know how synchronization between the GPS unit and any other sensors is done in a typical system. I understand that the 1PPS signal plays an important role. Could anyone give me a very ...
1
vote
3answers
90 views

GPS Antenna | When is an Active Antenna really Necessary?

Many vendors provide positioning modules that support active antennas as well as ones that don't. I am using 4 positioning modules out of which 3 of them support active antennas and the other , CC4000 ...
0
votes
2answers
70 views

GPS & GLONASS systems Antenna Selection

It is known that GPS satellites transmit information in the frequency 1575.42MHz MHz while GLONASS satellites transmit information at the some other 1602.0 MHz. How come most GNSS module makers say ...
1
vote
2answers
151 views

SGEE vs CGEE vs A-GPS

I refer to the explanation I picked up from a pdf below. Please note a person who already has knowledge on A-GPS and CGEE and SGEE does not have to read the explanation provided for those below. I ...
4
votes
3answers
662 views

GLONASS and GPS satellite usage simultaneously by Positioning Modules

Can a GPS module use 2 GPS satellites and 2 GLONASS satellites to obtain a fix without using all satellites of the same kind? I know that we cannot force this to happen but is it theoretically ...
0
votes
2answers
57 views

GPS modules with Active Antenna and without Active Antenna

After so much research, I've found out that GPS modules have so many factors that depend their performance on. But I was initially under the impression that GPS devices with active antennas are ...
0
votes
1answer
56 views

Correctly receiving the nmea characters from A2200-A GPS

I have been working on this project for a little while, trying to receive the characters from my GPS and then display these characters on a 16x2 LCD. I am using an interrupt on my UART RX pin which ...
1
vote
1answer
135 views

GPS signal strength issue - route layout problem?

In my design I use GPS module u-blox MAX-7, LNA MAX2659 and chip GPS antenna. First prototype design shows good signal strength, in 2 minutes from a cold start I have a fix. Here is the picture of PCB ...
1
vote
1answer
46 views

GPS parity decoding, how to get D29 and D30 of previous bits?

According to ICD GPS 200C, to decode the bits of a word you need to have the bits 29 and 30 of the previous word, this means that to get the bits 29 and 30 of the previous word you should know the ...
0
votes
1answer
132 views

How to install an embedded GPS patch antenna

How should I install an embedded GPS antenna? Here is the antenna in question: http://www.robotshop.com/ca/en/seeedstudio-embedded-gps-antenna-for-gps-bee.html It has a 9 cm cable. My project ...
0
votes
1answer
56 views

How do I connect GPS receiver module with USB interface?

I have a GPS module DS-330R which has 6 connections, two are not used, one is Ground, one is Vcc (3.8 to 12.0V DC) and the remaining two are Data+ and Data- for USB connection. My questions are: Can ...
0
votes
4answers
192 views

Voltage decreases on higher current

I have a circuit composed of Arduino Mini Pro 3.3V and GY-GPS6MV2 (GPS Ublox NEO-6M). I have tried to power it with 3 different sources: 3xAA NiMH in serie connected to RAW pin of Arduino and using ...
0
votes
0answers
50 views

GPS Not Working

I'm working with Venus 638 GPS and trying to get my current location. All the documents of it (datasheet, scheme, etc) can be obtained here. To deal with it, I'm using codevision avr and monitoring ...
1
vote
3answers
108 views

How does GPS detect coordinates?

While I understand how GPS receiver finds its distance from GPS satellites and exact position using trilateration, I still do not understand how is GPS system able to find the latitude and logitude ...
1
vote
2answers
112 views

GPS and Barometer assisted flight on a mountain

This question is regarding a drone and its GPS/Barometer sensor and may not fit well in this community and if that's the case, please advise if I should move it elsewhere. So. I have built a DJI F550 ...
3
votes
1answer
506 views

What is the purpose of a battery on a GPS receiver?

My GPS receiver has a small MS621FE battery: Any ideas what might be the purpose of a battery on a GPS receiver?
0
votes
2answers
285 views

SIM908 GSM and GPS modules individual power control

I've been searching around google and even in manufacturer site for this information and found nothing relevant. Is it possible to turn off GSM module and keep turned on the GPS? How can it be done? ...
1
vote
2answers
144 views

Position tracking system for frisbee

I'm trying to build a smart frisbee for use in Ultimate. I'd like to be able to track the position of the frisbee in a playing field with pretty good accuracy (within ~2ft). GPS is a possibility, but ...
1
vote
0answers
21 views

Error models for tracking systems

Question in short: what is a suitable model to describe, model or even generate typical errors of a 2D, 3D, 6 DoF tracking system? I am interested in measuring the influence of the quality of ...
0
votes
3answers
130 views

Why can't the PIC18 perform a divide operation accurately?

I just noticed that when I am converting coordinates from N/S E/W format to decimal format it getting wrong product. I tested 1256/3600 which should be 0.3488888888889 but my pic gives me 0.3488922 ...
0
votes
1answer
82 views

using mbed with gps

I am trying to program an mbed micro controller to work with a GlobalSat EM 406 GPS receiver and have got it outputting long and lat to a host computer using the information on: ...
3
votes
2answers
280 views

GPS update rate

My thought process: I i'm am looking for a GPS that updates fast enough to actually read its position traveling 130 miles an hour ( I did some math and think 5 times a sec up date rate would get me 17 ...
1
vote
2answers
179 views

Tradeoff between embedded chip and external GPS antennas

I'm currently redesigning a board that implements GPS positioning. Until now I've been using a Fastrax IT520 module, which is very nice but has been discontinued. This forces me to rethink my board ...
0
votes
1answer
248 views

Shorted antenna DC-blocking capacitor value

I have an antenna that contains a DC short to ground ( a PIFA antenna at 1575 MHz in this case ). However, my device cannot tolerate a DC short to ground, so I need to include a blocking capacitor in ...
-1
votes
1answer
67 views

Get location data for a program using GPS dongle [closed]

I'm working on vehicle tracking system using GPS. What I want to do is connect GPS receiver to my laptop and fetch the location data in to my program. I have seen many commercial GPS receivers and ...
3
votes
2answers
475 views

GPS positioning for quadcopter

I am an engineering undergraduate student. I am currently working on a project to implement a sensing package on a quadcopter for the deployment in the canopy of tropical rain forests. This package ...
-3
votes
1answer
172 views

Xbee GPS Tracking

We're building a tracking system using Xbee and GPS. Wherein the GPS data is transmitted using the Tx Xbee and received with the Rx Xbee. We've supplied a 3.3V to both the Xbee and GPS (SKM53 by ...
-1
votes
1answer
239 views

Not getting data from Parallax GPS

I am trying to use a Parallax PMB-648 GPS with an Arduino Nano running this code: ...
0
votes
1answer
135 views

Maestro A2200 GPS flash corruption

Does anyone have experience with the Maestro A2200 GPS module? I bought this module primarily on price, it's only 15 euro, but the datasheet indicates that sudden removal of power can result in ...
1
vote
1answer
140 views

GPS USB device with external coax antenna? [closed]

I've been looking around for a bit searching for a USB connected GPS reciever which i can hook up to my laptop. However, the building i'm sitting at is not ideal for recieving GPS signals but i do ...
1
vote
1answer
92 views

12v socket not providing enough current for mobile phone? [closed]

I've just installed a 12v socket to my motorcycle. The socket has a sticker saying "12V - 1A", and the user manual says that "use is possible up to a power input rating of 12W". Taking that into ...
-2
votes
2answers
83 views

Getting the direction that user is facing

I've just started playing with electronics and I'm wondering. As you guys probably know, using the iPhone you can get the direction that the user is facing. My question is, what electronic ...
2
votes
2answers
89 views

Two chip antennas, same ground plane?

I would like to use a 430mhz RF antenna and a 1575mhz GPS antenna. Both antennas are chip and drive current in the ground plane to radiate. The RF antenna is only useful 1s every minute. The GPS has ...
1
vote
1answer
172 views

Honeywell Dead Reckoning Module GPS Problems

This was previously posted in the Stack Exchange forum and I was referred here. I'm currently trying to connect a Honeywell DRM4000L to a GPS module. The DRM is a dead-reckoning device which takes a ...
2
votes
1answer
158 views

GPS accuracy problems outside vs inside with repeater

I have an interesting problem testing GPS receivers: While working inside our lab, we get reasonable results. We have a GPS repeater, as shown in the picture. Inside the lab, I get good accuracy ...
2
votes
0answers
40 views

Intermittent control signal injection clock sync

I have a big challenge in my design to overcome: I need clock frequency accuracy of <0.2ppm with incredibly low power consumption. What we are doing currently is, using a 3G transceiver' baseband ...
2
votes
1answer
83 views

GPS configuration

I am having trouble configuring a GPS module. According to the data sheet it has 20HZ update rate and 2.5m accuracy. However, the results usually shift between 10m to 100m away from what they are ...
1
vote
0answers
40 views

The best components for a hybrid positioning system

I am stuck and need some extra brain power. I am attempting to build a grid of sensors with a trackable object...constrained to an X-Y plane, AND the object that is being tracked must be done so ...
-2
votes
2answers
726 views

Microcontroller with integrated GSM & GPS support? [closed]

I am looking for a single chip microcontroller with GSM & GPS solution. Is there any microcontroller chip which is specifically available for GSM & GPS solution? So that it will act like ...
1
vote
2answers
109 views

Collecting data from GSM devices

this is my first question on electronics, so I hope I will get it right. :) GSM and GPS are topics which are quite new to me, but I will try to be as clear as I can. Is it possible to collect data ...
0
votes
0answers
385 views

Using 3DR's uBlox GPS with Compass Kit with Arduino

How do I hook up 3DR's uBlox GPS with Compass Kit to an Arduino UNO to get GPS data on the serial monitor? I was trying to use the tutorial on Adafruit. I think the data is being sent out differently ...
2
votes
0answers
111 views

Capturing a 16.368MHz data stream with a MCU running at 32MHz

I have a 32MHz MCU (Atmel XMEGA A4) and I need to recover a digital signal coming from a GPS front end chip which is outputting SIGN and MAGNITUDE data at 16.368MHz. Clearly this is a hell of a task ...