Terrestrial Receiver

Detailed Explanation Of GPS (Global Positioning System)

What is GPS?
GPS (Global Positioning System) is a satellite navigation system developed by the United States Department of Defense (U.S. DoD = United States Department of Defense). GPS allows us to know our geographical position (latitude, longitude, and altitude above sea level). So wherever we are on this earth, we can know our position exactly.

DEVICE involves about three pieces: space segment, control / control, and users:

• Space Segment: consists of 24 satellites that operate in 6 orbitat an altitude of 20,200 km and inclination of 55 degrees with a period of 12 hours (satellite will return to the same point in 12 hours). Satellite The particular circular orbit to ensure that as a minimum there are actually some satellites which could administered with every position that is known. Satellites monitor job plus time frame that will people globally.
• Segment Control / Controller: there is the main control center contained in Colorodo Springs, and 5 other monitoring stations and 3 antennas spread across the planet. Monitoring station to monitor all GOS satellite and collect information. Following place subsequently send out the knowledge on the major deal with middle subsequently perform your calculations along with viewing from the satellite orbit. Facts are generally subsequently adjusted along with designed messages along with provided for NAVIGATION SYSTEMS satellites.
• User Segment: The GPS receiver takes the user side (Hereinafter we call the GPS devices), which usually consists of receiver, processor, and antenna,  nabling us anywhere we are on this earth (land, sea, and air) can receive signals from GPS satellites and then calculate the position, velocity and time.

How does GPS work?
Every satellite transports not one but two indicators, namely L1 (1575.42 MHz) and L2 (1227.60 MHz). L1 signal is modulated with two pseudo-random signal that is the code P (Protected) code and C / A (coarse / Acquisition). L2 signal only bring the code P. Each satellite transmits a unique code so that the receiver (GPS devices) to dentify the signal from each satellite. At the time of the "Anti-Spoofing" is activated, the code P will be encrypted and subsequently known as the code P (Y) or Y-code.

GPS devices that are specific for only civilian to receive the code C / A on L1 signal (although in a sophisticated GPS devices can take advantage of the L2 signal to obtain a more precise measurement.

GPS devices receive signals transmitted by GPS satellites. In determining the position, we need at least 3 satellites for the determination of 2-dimensional position (latitude and longitude) and 4 satellites for the determination of 3-dimensional position (latitude, longitude, and altitude). More and more satellites are obtained, the accuracy of our position will be higher. To get these signals, the GPS device must be open space. If your GPS device we are in a room or a dense canopy and the area we are surrounded by tall buildings, the signal obtained will be further reduced so that it would be difficult to determine precisely the position or even not able to determine position.

How is GPS used?
NAVIGATION SYSTEMS units acquire signs via satellites and perform your data in order that the overall check out that people can certainly realize your location (in latitude along with longitude), pace, along with time period. Besides, additional information such as distance and travel time. The position shown is the geodetic reference system WGS-84 and time is a reference to USNO (U.S. Naval Observatory Time)

Who can use the GPS?
NAVIGATION SYSTEMS is required inside a large number of career fields, amid other people, planes direction-finding programs, seashore along with property, mapping along with geodesy, surveying, place perseverance method, farming, healthy reference quest, even more.

Is GPS free?
NAVIGATION SYSTEMS engineering are available by simply everyone, we all have to have merely purchase a NAVIGATION SYSTEMS phone gadget along with more information can certainly we all obtain the location without having paying out anything at all.

How GPS accuracy?
GPS has two levels of accuracy:

• Standard positioning system (standard positioning system / SPS)
  SPS is available to the public (civil). The resulting level of accuracy is 100 m for horizontal position and 150 meters to a vertical position.
• Precision positioning system (precision positioning system / PPS)
  PPS is used by the U.S. Defense Department and not available to the public.
  Since May 2000, the U.S. government has increased the accuracy for the SPS to disable SA (selective availability) to 20 yards to the horizontal position.

What is a GPS device?
GPS devices are there different kinds and generally depends on the goals and activities we will do. GPS for air (aviation GPS) will be different from the architecture with which we will use to navigate on the ground / car. In general, the GPS device is divided into 3 (three) functions namely Air Navigation (aviation), marine (marine) and terrestrial (land).

Does GPS also Compass?
GPS is not a magnetic compass, unless specified that the GPS device has a function as a magnetic compass so you know where the North direction. However, GPS can tell which direction we are MOVE, so that we can find out where the North direction. If you do not move, then the direction indicated the possibility of completely WRONG.

What GPS device is right for me?
Just start with a simple GPS device. Besides the price is affordable and you can get used to using GPS and understand your real needs. There are several GPS vendors are available, including Garmin, Magellan, Trimble, and Leica. The most important thing is, whatever the GPS device you buy, make sure that these devices have a 12 channel receiver to obtain satisfactory results.

I have a GPS and I still get lost!
The problem is not on his GPS, but how you use it. You have to understand the workings of your GPS device properly. Take time to read manuals and instructions of usage.

I have a PDA, whether to have the GPS function as well?
You can add a GPS device on your PDA. You can select a GPS device or a Bluetooth GPS-CF, or even a regular GPS device. Each has advantages and disadvantages. Please look for any information on google if you want to know more. In essence, you add PDA GPS devices and software installation that supports and then please have fun with your GPS. How to connect your device with your PDA, all clearly explained in the manual bluetooth GPS device or CF you buy.

Is Mobile (mobile phones) can add a GPS device?
Some phones are equipped with GPS, such as Garmin and HP iPAQ hw6515 NavTalk. Some phones can be added to the GPS device such as the SE P910i, Nokia several types.

 

Unlock GMAPSUPP.IMG (Garmin Map)Locked Map Files

If you are really desperate & can’t find any other way to unlock GMAPSUPP.IMG (Garmin Map) locked map files, because software like GPSMapEdit can’t seem to be able to deal with locked map files, and its always end up with “WARNING: The map is locked. (NOTE: such maps are not supported by intention).”

Here’s how to unlock GMAPSUPP.IMG (Garmin Map) locked map files :

1. Download Garmin Unlocker (download link at the end of this post).
2. Create “MAP Locked” directory, then copy your IMG file into directory.
3. Write your map details in MapsetHeader.txt and MapName.txt file

• MapsetHeader.txt eg. “Garmin City Navigator NT 2010.30″ without quotes (50 characters allowed)
• MapName.txt eg. “Europe (Unlocked)” without quotes (50 characters allowed)

   4.  Run “UNLOCK MAP DIRECTORY.EXE”

   5.  Now you have GMAPSUPP.IMG inside “MAP UnLocked” directory

 

One well-known manufacturer of GPS is Garmin. Garmin has released a popular product such as Garmin 2460LMT. Nuvi 2460LMT can assist you in determining your position and various other facilities.

That glimpse of the GPS. Hopefully this information can provide more knowledge about GPS. Hopefully useful.

How to record from the SilverCrest SL65T to a VCR?

How should I arrange my setup so that I can record digital TV

I own a SilverCrest SL65T, digital terrestrial receiver, with two scart sockets
A VCR with two scart sockets and
A Television with two scart sockets.
DVD Player 1 Scart socket

At the moment I have the following setup
SL65T – Scart 1 to video
Scart 2 to TV (following manufacturers instructions)
DVD Player scart to TV
I receive analogue as well as digital very well.

The digi box has various other connections like-S-VHS but the Video recorder only has the scart sockets.

I would like to record a digital channel while watching an analogue channel (the box only has one tuner) or record analogue while watching digital. If I’m recording from a digital channel can I put the TV in standby mode?

At this point in time I’m not worried about pre-programming I’m quite happy to just press record at the start and finish. How do I go about it?

Connections diagrams here - http://www.radioandtelly.co.uk/connecthelp.ph
The digital channel needs to be selected and on, to record.

Multi Digital Terrestrial Receiver with Remote Control DVB-805 from Dinodirect.com