The document discusses car navigation systems and provides details about how they work. It notes that car navigation systems use GPS and satellites to determine the car's location and plot routes to destinations entered by the user. The system guides the driver with turn-by-turn voice directions and visual maps. It also continuously tracks the car's progress and updates the route if the driver gets off course.

1. What is the primary idea of the content in the articles?
The car navigation is very convenient in diverse reasons. For example, it guides to
the place where you want to go by only inputting the address, only the telephone
number, and only the key word and so on of the place where you want to go. And the
car navigation is guided to the place where you want to go by the voice. And we can
drive safely because it guides by the voice and so on.
Do you think the individual sections and headings in the document (articles)
clearly represent the idea that was communicated. Explain the reasons behind
your comments.
I think the individual sections and headings in the document clearly represent the
idea that was communicated. Because car navigation capabilities depend on a global
positioning system, known as GPS, which uses a network of satellites with radio
transmitters. For a car navigation system to work, there have to be at least four GPS
satellites near enough for it to pick up a signal. Once the car's GPS calculates its
position, it can use a map program to find its way to a new location.
What details are included in the articles?
The usage of the car navigation is written in the article. At first, you need to read
carefully the manual of the car navigation. Second, turn on the car's engine. Third,
turn on the navigation's switch, and disclaimer will appear on the navigation's screen.
Fourth push the Menu button on the remote. Last, input the address where you want
to go or telephone number. And we can drive safely because it guides by the voice
and map.
Was there anything that was confusing? If so, what is it?
I think car is never located exactly the same distance from each satellite, its GPS gets
signals from nearer ones slightly before more distant ones. By measuring the slight
delay, the GPS receiver can tell how much further it is from one satellite than it is
from another, and since the transmission includes information about where each
satellite is, the receiver can calculate its total distance from each satellite. It then uses
this information to calculate exactly where it is located.
What is good about the writing? Why is it good?
The car navigation system also features a sophisticated built-in map, which knows
precisely where streets are located on the surface of the earth. When you enter the

2. address of your desired destination the map plots a course along the streets to that
location. As you travel there, the map continuously receives GPS transmissions,
which it uses to update its location information, tracking your progress to your
destination. If you get off course, the GPS system knows and plots a new course.
Are there any errors that need to be corrected?
Listen to the voice prompting you to begin the trip. A map of the route appears on
screen. As you approach a turn, the screen changes to a turning screen. The name of
the street to turn on appears at the top of the screen; the name of the street you are
traveling on appears at the bottom of the screen. An arrow shows which way to turn,
and a voice prompts you to turn. Make the turn. Proceed to next turn when the system
prompts you via voice and map.
What specific suggestions for improving the articles can you make?
An automotive navigation system is a satellite navigation system designed for use in
automobiles. It typically uses a GPS navigation device to acquire position data to
locate the user on a road in the unit's map database. Using the road database, the unit
can give directions to other locations along roads also in its database. Dead reckoning
using distance data from sensors attached to the drivetrain, a gyroscope and an
accelerometer can be used for greater reliability, as GPS signal loss and/or multipath
can occur due to urban canyons or tunnels.
Identify three basic differences between how your group would author a similar
document and how this author authored it (as you see it in the link).
Most major technologies required for modern automobile navigation were already
established when the microprocessor emerged in the 1970s to support their
integration and enhancement by computer software. These technologies subsequently
underwent extensive refinement, and a variety of system architectures had been
explored by the time practical systems reached the market in the late 1980s. Among
the other enhancements of the 1980s was the development of color displays for
digital maps and of CD-ROMs for digital map storage.
Study the following video carefully and then summarize 10 major points that
you were able to understand.
A mobile phone allows its user to make and receive telephone calls to and from the

3. public telephone network which includes other mobiles and fixed line phones across
the world. It does this by connecting to a cellular network owned by a mobile
network operator. A key feature of the cellular network is that it enables seamless
telephone calls even when the user is moving around wide areas via a process known
as handoff or handover. In addition to being a telephone, modern mobile phones also
support many additional services, and accessories, such as SMS (or text) messages,
email, Internet access, gaming, Bluetooth, infrared, camera, MMS messaging, MP3
player, radio and GPS.
Study the following video carefully and then summarize 10 major points that
you were able to understand.
An iPhone functions as a camera phone, including text messaging and visual
voicemail, a portable media player, and an Internet client, with e-mail, web browsing,
and Wi-Fi connectivity. The user interface is built around the device's multi-touch
screen, including a virtual keyboard rather than a physical one. Third-party
applications are available from the App Store, which launched in mid-2008 and now
has well over 200,000[2] "apps" approved by Apple. These apps have diverse
functionalities, including games, reference, GPS navigation, social networking, and
advertising for television shows, films, and celebrities. There have been four
generations of iPhone hardware, and they have been accompanied by four major
releases of iOS (formerly iPhone OS). The original iPhone established design
precedents like screen size and button placement that have persisted through all
models.