The Many Types of GPS Receivers

By On March 11, 2011 · 1 Comment

According to the different using purpose of GPS Receiver, there are a variety of GPS signal receivers for customer demands. In a general way, GPS receiver has the following classification in accordance with the principles, purpose and function.

1.Classified by the application

Navigationalroutetype and Geodetic-type

2. Classification by the carrier frequency

Single-frequency and Dual-frequency GPS receiver

3. Classification by working principle

Code related type receiver, Square-type receiver, Hybrid Receiver, Interferometric-type receiver

At a glance of GPS receiver on the website – ePathChina.COM

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Chipset: Skytraq Venus 6, powerful GPS receivers
Channels: 65-Channel all-in-view tracking
Four-in-one powerful GPS receivers wiht GPS location finder, receiver, data logger, and photo tagger
Switch between Location Finder and Data Logger modes
The Powerful GPS Receivers Memory: Store up to 100,000 records in flash memory (8M bits)
Eight LEDs indicate direction clearly
Able to record point of interest (POI)
Frequency: L1,1575.42 MHz
Tracking Sensitivity: -160 dBm
Re-acquisition: -157 dBm
C/A Code: 1.023MHz
Datum: WGS-84
Output data: NMEA-0183 V3.01; SkyTraq Binary
Accuracy:
- Horizontal Position: 10m 2D RMS (without SA)
- WAAS Enabled: 5m 2D RMS(without SA)
- Time: 1 micro-second synchronized to GPS time
- Velocity: 0.1m/sec 95% (without SA)
Acquisition Rate:
- Hot Start: 1 sec.
- Warm Start: 25 sec.
- Cold Start: 29 sec.
- Reacquisition: < 1 second
The Powerful GPS Receivers Operation Range:
- Max Acceleration: Up to 4G
- Max Altitude: Up to 18,000 meters
- Max Velocity: Up to 515 meters/sec.
Log Interval: By time (1 sec. to 30 mins) or distance (1 to 65,535 meters)
Log Data: Longitude, Latitude, Speed, Altitude, UTC
Output Data Format: WGS 84
Software Functions:
- View in Google Maps or Google Earth,View multiple paths simultaneously
- Upload photos to Flickr and Flickr Maps, Add photos, videos, audio files, comments, and place names to any point on your track
- Display speed and altitude graphed against time,View speed, latitude, and GPS coordinates at any point on your path
Compatibility: Windows XP and Vista (32 bit version only)
The Powerful GPS Receivers Support Free updates
Languages: English, Spanish, French, German, Dutch, Italian, Portuguese, Russian, Thai, Korean, Japanese, Simplified Chinese, Traditional Chinese

http://www.epathchina.com/gps-devices-gps-receivers-c-74_69.html

Sensitivity is one of the most important characteristics of a GPS receiver. In this video, learn how to measure a receiver’s sensitivity using the NI GPS Toolkit for LabVIEW and a PXI vector signal generator.

Question by HAR jase: gps receiver?
gps receiver with radio frequency

Best answer:

Answer by ford_man315

http://www.realhamradio.com/GPS_Frequency_Standard.htm

Give your answer to this question below!
Will You Need LightSquared’s GPS Receiver?
And to prove the point that building such a device is possible, LightSquared has (at least temporarily) entered the GPS receiver manufacturing business and produced a product it says is up to the task. LightSquared told reporters Wednesday that it has …
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How Can You Unlock Your Gps Navigation System?

By On March 3, 2011 · Leave a Comment
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(Pocket Navigation) can be divided according to the operating system:

- with Windows Mobile CE (WinCE) operating system (most GPS NAVIGATION Mio,Becker,Sony,Blueberry,Magneo,Magellan…):
- WinCE 4.2 OS
- WinCE 5.0 OS
- WinCE 6.0 OS
- with the Linux operating system (Garmin, TomTom…)

Here we can say more about the first group – Navigation with WinCE OS:
for connection to a PC, using “Active Sync” while others “Mass Storage”. Some have one or other option. – “Mass storage” – mass storage, a faster version, the data transfer between PC and GPS navigation. The only thing then you can not see the original folders (Flash drive, Windows …), so you can not modify data in these folders.

- “Active Sync” – PC Connection sotver Windows Mobile and Windows OS. If using Vista and Windows 7 it is the software called “Windows Mobile Device Center”. Active sync is great, because it provides access to all system folders (Flash drive, Windows …), but is very slow because, usually, in order to speed 1.x and transfer large files, takes a long time.
GPS navigation devices navigation software warehouse, typically, the drive-in Flash (internal memory). Though for some, a rare case, the navigation software on the memory card externoj. Flash drive – internal memory GPS Navigation has a capacity of 50MB – 4GB, depending on the GPS navigation. Most often, the newer generation of , memory up to 2GB.

Windows, My Document and Program Files folders are stored on internal memory, but not the flash drive, but an additional protected partition on the internal memory (something like C: \ on the PC).

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GPS Navigation, when starting, automatically run an autorun application. Less often is the case, I immediately run the navigation software. Autorun software, provides the ability to set basic functions, such as:
- The sound (volume, audibility of keys),
- Display (Calibration (calibration display), Contast, Brightness)
- Audio player (a rare case that the navigation device has an audio player)
- Picture viewer (software for viewing images)
- Navigation (key to start the navigation software)

How to Unlock GPS NAVIGATION

can be unlocked in various ways, and here we will talk about unlocking via SD or MMC memory cards externe. The entire card set virtual system (portable), such that it reads NAVIGATION with external memory card. Each time you start (if the memory card in the device), starts the “portable system OS” if the card is removed, run the original software and the autorun again, after the return of the card into the machine and after rebooting, re-launches portable OS. Autorun software that is used to unlock the navigation, there are several variants:

VISUAL UNLOCK
Such software provides only the minimum necessary, but look nice and are easy to use.

All skin-these are interesting in their own way and all provide similar options:

- Start a navigation software and more

- Access to Windows Explorer

- Settings (Settings)

- Video and Audio Player

FULL UNLOCK

These portable operating systems provide a maximum. And give the possibility
installation of additional software, because they behave exactly like XP Operating
systems. Such a Portable OS, gives you the feeling that the hand holding Notebook (laptop) computer, not a navigation device. The possibilities are practically limitless.
Newer GPS navigation, to run powerful ARM9 ARM11 processor and have enough RAM to cope with almost any application. So the sense of working through “touch screen”, even more beautiful and easier than a notebook computer.Support for almost all devices. Few of those that can not be Unlock install some software.

GPS NAVIGATION – USE AFTER UNLOCK

Using simple, as in any notebook. Do some errors in the system (device), can not come, because all programs and all applications on the memory card and from there and run. Nothing is saved on your flash drive GPS navigation. If you find that slightly slower, after prolonged use, it is enough to restart the device and is again all right. Supported by almost all , where you can come by the internal Flash memory. Because the number of on the market very large, it is best to make navigation to the first look I find that would unlock the superior solution for your

My GPS started copping an attitude with me because it was on PMS. Luckily I captured it on tape
Video Rating: 4 / 5

Palm-Sized Surgical Navigation System Enabled By Analog Devices’ MEMS Motion …
(EON: Enhanced Online News)–Analog Devices, Inc. (NYSE: ADI) today announced that OrthAlign, Inc. has selected ADI’s high-performance iMEMS ® inertial motion sensing technology to enable its new portable surgical navigation system that guides femoral …
Read more on EON: Enhanced Online News (press release)

 

The Future of Global Positioning Satellite Technology

By On February 28, 2011 · 3 Comments

The technology of today has given us an ingenious device with which we can find our way through unfamiliar places. This device is simply called a gps system or to be more exact global positioning satellite. This interesting device was originally devised by the military to navigate their aircraft and other systems with the aid of tracking satellites.

 

The original global positioning satellite system was designed sometime during the late 1960s. This device was called Transit and it utilized seven satellites and radio signals to receive and send coordinate information. The next improvement to the global positioning satellite system was developed during that same time period. Unlike its predecessor this new gps system worked using an atomic clock.

 

Even though these were all improvements on the navigational process there were still issues of inefficiency and inaccuracy to be dealt with. To combat this problem the Navy and the Air Force joined forces and created a new gps device. This device was called Navigation System and Ranging or the shorted form was called NAVSTAR. The launch of this device came about during the early 1970s.

Once the system was perfected to a large degree, the point of use swung towards the general public as well. Today you will see many different uses for the global positioning satellite systems. These range from cell phone, car gps systems, hiking gps devices, hand held devices. There is even a patent pending for a global positioning satellite system to be embedded into shoes that children wear.

 

These are just a few of the many different applications you will find global positioning satellite systems being used for. While many of the uses of these devices are helpful, there are issues about privacy which need to be settled before too long. At the moment the benefits of using these gps devices outweighs the disadvantages. This is especially true of cell phone uses who have become stranded or been in an accident.

 

In the earlier time periods there was no actual way of determining the location of cell phone callers who needed help. This was due to the fact that their phones themselves were not traceable, unlike that of land phones. This problem has been resolved with the embedding of global positioning satellite technology.

 

Today all new cell phones have this technology embedded into their systems. As a result emergency and rescue services now have an easier time locating and providing help to cell phone users.

 

With so many new ways of finding people and places it seems hard to imagine that a small device can take us places. Today the city streets are open to us thanks to global positioning satellite technology, tomorrow who knows where we will venture.

Question by redryan: What global position satellite systems is the batter GLONASS or are GPS navigation system.?
what is the main deference between the two systems. what are the advantages and disadvantage

Best answer:

Answer by Mark G
GPS. GLONASS has not been serviced for a number of years and has a large number of coverage problems. Although Russian does intend to rebuild the system, likely as not it will not have full coverage.

Add your own answer in the comments!

 

What You Should Know About GPS Satellites and GPS Signals

By On February 25, 2011 · 3 Comments

Flight schools help their students to be familiar with all the aircraft equipment. Student pilots will be hearing about GPS most of the time during training. As a pilot trainee, you must know what GPS means and its use.

GPS stands for Global Positioning System, a satellite-based system that helps in navigation and made up of a network of 24 satellites placed into orbit and transmitting signals to earth. GPS receivers retrieve this information and calculate the exact location of the user by using triangulation. After receiving the signals, GPS receivers determine how far it is from the satellite location. Utilizing the measurements of distance given by a few more satellites, the receiver can easily determine the position of the user and display it on the electronic map of the GPS unit. In order for a GPS receiver to calculate a 2D position and track movements, a GPS receiver must be linked to at least three satellites.

GPS receivers do not only concentrate on determining the location but also other information like the speed, track, trip distance and much more. Even the weather can be calculated by GPS.

GPS receivers are very accurate because of its parallel multi-design. As designed by Garmin, it has 12-channel receivers that are quick to respond onto satellites. They also maintain strong locks that enable it to get all the necessary information that is needed. They are designed with all the advancements in today’s technology so that it can keep pace with all the other latest equipments that we have right now.

Latest versions of Garmin’s GPS receivers have Wide Area Augmentation System (WAAS) capability that can improve the accuracy to less than an average of three meters.

GPS is composed of 24 satellites that are constantly orbiting the earth about 12,000 miles above the earth at roughly 7,000 miles per hour. They are powered by solar energy and have backup batteries in case a solar eclipse occurs. There are two rocket boosters on each satellite for balance and to keep them on track.

There are three different bits of information that a GPS signal has- a pseudorandom code which is commonly known to be the ID code that identifies the satellite that is transmitting the information; ephemeris data which is constantly being transmitted by satellites and contains information that are important for the status of the satellite, the current time and date; and almanac data which tells the GPS receiver where each GPS satellite must be at a certain time of the day.

GPS is representative of the most advanced equipment that is being offered for aircraft like Cirrus.

Coast Flight Training uses Cirrus models that have GPS to enhance safety and situational awareness.

 

Question by zuestra99: Why are GPS satellites in medium orbit rather than geostationary?
Is there an advantage, other than probably cost, to having the GPS satellites at 12,000 miles rather than in geostationary orbit? Would it work either way?

Best answer:

Answer by SiriusB
Geostationary can only apply to equatorial orbits. With GPS satellites it makes more sense to have them in a polar orbit so that they can cover the entire Earth’s surface over time. Also I presume that putting a satellite at the relatively large distance required for a stationary orbit (22,000 miles) would significantly reduce the precision with which the distance could be measured (GPS doesn’t use triangulation, it works by measuring the distance between satellite and receiver).

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LightSquared solves GPS interference with new device
“Since we have demonstrated that LightSquared can certainly coexist with the current GPS satellite signals, the coexistence will be even stronger when the new GPS satellites with modern L1C, L2C, and L5 unencrypted codes are launched. …
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