Writing an Essay

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Essay Title

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Inertial reference system

Disadvantages

Time information cannot be given

INS is an expensive technology

Vibration and thermal variation may cause flaws in information data

An increase in computing complexity

Advantages

Operates at all the altitudes

Greater reliability

Reduced size

Lower cost

Inertial system

Sources of error

How these error can be overcome?

They might decide to deselect the system

If one system’s position differs from the other two by a predetermined amount the crew can be alerted to this

Gyro error

Alignment errors

Initialization errors

Alignment process

Important

Determine a local vertical and direction of true north

In inertial navigation system

Initial heading using

Laser gyro

Accelerometer

Determining the local vertical

How the accelerometer provides reference output

Processed to develop navigation data

Example

Two accelerometer and directed to N-S or W-E

Two accelerometer

Give out data velocity and distance in any lateral direction

Measure acceleration

Mount together with right angles

Calculate velocity and distance information

Only one direction

Operation of GPS system

In event of poor satelite coverage

The system uses other navigation sensor inputs to enter into a dead reckoning mode

Less than 30 seconds

Control segment

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Location

Develop the ideas presented in the introduction.

Ground antennas

Located on

Five monitoring stations

Type in a one-line sentence to describe the third body paragraph.

Located in

Ascension Island

Diego Garcia

Kwajalein

Hawaii

Colorado Springs

One master control station (MCS)

Type in a one-line sentence to describe the second body paragraph.

Located at Schriever in Colorado Springs, USA

Purpose

Create a catchy introductory paragraph.

Take into consideration the interests of your audience.

Ensures that GPS satellite orbit and clock remain within acceptable range

To predict the behavior of each satellite orbit and clock

Differences

Analyze another essay written on this topic

Find at least one example and see whether it is well written or not.

Almanac data

Considered valid for up to several months

Not very precise

Ephemerus data

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of the essay which you're going to analyze.

An accelerometer is a key component in navigation systems, providing critical data on velocity and distance. Typically, two accelerometers are used, mounted at right angles to measure acceleration in different directions, such as north-south or west-east.