Welcome Students!

Hello…Anybody Out There?

• What do these things have in common?

All these things use radio waves to send or receive information!

Electromagnetic Spectrum

Air: Information Highway

sends information

helps transmit and receive information

receives information

Transmitter:

Receiver:

Antenna:

Antennas

Smaller waves

(size of humans)

Bigger waves

(size of buildings)

Binary Code (Computer Language)

• Bi = a prefix meaning two

• Binary Code: A code that uses two types of symbols to represent data.

0 = 00000 5 = 00101

1 = 00001 6 = 00110

2 = 00010 7 = 00111

3 = 00011 8 = 01000

4 = 00100 9 = 01001

10 = 01010

Pictures

• Pixel-”Picture Element”, one of many tiny squares that makes up a bigger picture

Several Hundred Pixels

Several Thousand Pixels

Several Million Pixels

Houston…we have communication

Ground Control- the operating position where the satellite is controlled

Operation Communication

Satellites Ground Stations

Operation Communication

4

A C

1

2

3

B D

4

A C

1

2

3

B D

A1A1

A 1

1. Ground station will ask for A1 by sending the ball with the “A1” sticker to satellite.

2. Satellite looks to see what color A1 is.

0010

A

1

Blue = 0010

3.Then sends the binary code for the color back to the Ground Station.

4. Ground Station looks to see what color the binary code is.

A

1

0010

5.Then the Ground Station colors in A1 that color.

Blue = 0010

6. Then pick another square and do it again!

Operation Communication

• Get into groups

• Gather materials

• Houston…we’re go for communication