stands for Global Positioning System, a satellite based navigation system

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gps skm53 arduino not worcking [migrated]

gps skm53 not return latitude and longitude this code ...
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12 views

SIM908 wont work without charger connected

my sim908 circuit does not power-up when vchg pin is not connected... once i connect vchg pin to the vbat or input 5v from another source, it starts functioning properly.. See Below screenshot of the ...
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1answer
36 views

Duplicate RX in uart (two devices listening one of which is data-logging)

I am not too familial with UART yet, and was wondering if I could some how duplicate the stream of information going to a microcontroller from a GPS. My application will be using a msp430g2553 ...
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6answers
277 views

Reradiating antena for GPS

I need to test and maintain a batch of devices which contain GPS modules. I can work on the rest of the device, but when it comes to test the GPS part I have no signal on my desk, no matter how near I ...
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4answers
103 views

In a gps receiver, how is the delay of the signal in the antenna lead allowed for?

In a gps receiver there is an inevitable time delay in the signal travelling in the antenna lead to the circuitry of the receiver. In a typical 5 metre lead the delay is about 15 nanoseconds, which, ...
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1answer
84 views

How big a ground plane does a gps antenna need?

How big a ground plane does a gps antenna need? I am using a GPS puck antenna that has a magnetic base to hold it on to, typically, the roof of a car. I would like to use it from my room at home, on ...
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53 views

Where I can get NMEA data dump of GLONASS or GPS simulator?

For my graduation work and my open source project about detection of «spoofing» GPS and GLONASS signal I need NMEA data dump of GPS/GLONASS receiver which receive signals from GLONASS or GPS ...
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2answers
60 views

Building a vehicle tracking device

I need to build 100 coach tracking devices. I am a web/mobile programmer, not an engineer, so I'm going to be looking at outsourcing for this. To outsource this work however I should know the ...
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0answers
30 views

Disc golf disc tracker gps [duplicate]

I've done a bunch of searching and can't find any info! I want to put a small tracking device on the bottom/center of a disc for disc golf. It needs to be light in wieght so that it will not mess up ...
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35 views

Voltage Across Patch Antenna and Power Output

I'm modeling a patch antenna using two copper plates (ground plane and patch), ceramic in between the copper plates, and a lead connecting the patch and ground plane that runs through the ceramic in ...
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1answer
50 views

U-blox 6 GPS module why does it still display points every second when set to 5 minutes?

I'm trying to set up a U-blox 6 GPS module with an Arduino. In order to save power I have tried to reconfigure it using the U center to search for a fix only once every 5 minutes. I have read the ...
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1answer
122 views

Can RFID technologies replace GPS for location/positioning applications? [closed]

I'm looking into a hobby project that would require a central interrogation device querying other devices for their location, as well as other metrics. This central device needs to know exactly where ...
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47 views

Shared feed/GND pad on Pulse W3011 antenna

This is my first post; sorry if I've unwittingly broken any rules or accepted conventions around here... I'm using a Pulse Engineering W3011 ceramic GPS antenna. As is common with these small ceramic ...
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1answer
54 views

A-GPS, cell tower, and provider service

I am not sure if I used the right forum to ask this question. If it is wrong, please point me the right one. I understand in general how A-GPS works with cell towers, and how it depends on the data ...
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2answers
67 views

Antenna phase shift

My question is regarding RF measurement systems which use antennas signal arrival time as principle of operation e.g. GPS. It is known that impedance of well-matched antenna immersed in lossy ...
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1answer
59 views

Dual GPS Antenna Connection to Possitioning Module

I am using a Positioning module that has a SMA port to hot plug an SMA antenna. It also has pins available through its foot print to connect a GPS Antenna. The module name is SIM908. I was not able ...
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63 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 ...
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2answers
72 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 ...
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45 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 ...
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2answers
92 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: ...
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1answer
52 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 ...
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2answers
114 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 ...
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61 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 ...
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67 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 ...
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195 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 ...
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3answers
117 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 ...
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2answers
85 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 ...
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2answers
231 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 ...
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3answers
753 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 ...
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2answers
85 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 ...
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1answer
99 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 ...
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1answer
209 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 ...
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62 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 ...
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241 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 ...
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65 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 ...
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4answers
249 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 ...
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58 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 ...
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3answers
114 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 ...
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2answers
193 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 ...
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1answer
513 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?
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2answers
375 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? ...
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4answers
305 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 ...
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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 ...
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3answers
171 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 ...
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1answer
122 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
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2answers
393 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 ...
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2answers
245 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 ...
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342 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 ...
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70 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
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2answers
545 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 ...