SLP 2 TRANSMISSION MEDIA AND DATA TRANSMISSION
Look up the altitude of a Globalstar satellite on the Internet. Use Kepler’s formula to check the accuracy of a given period and altitude for a Globalstar satellite.
Use the following exponent calculator to estimate the period.

http://www.rkm.com.au/CALCULATORS/CALCULATOR-powers.html

Submit the assignment answer in a 2- to 3-page Word document (excluding cover page and references) and explain how you arrived at the period using the Kepler’s
formula.

SLP Assignment Expectations
The report should:

Demonstrate clear understanding of the subject and address all key elements of the assignment.
Show analysis, synthesis, and evaluation of required material.
Demonstrate writing proficiency at the academic level of the course; address the Learning Outcomes of the assignment.
Use and cite relevant and credible sources to support assertions. The report is well organized and follows the structure of a well-written paper. APA style format is
applied for all citations.

Listen
Module 2 – SLP
Transmission media is the path between the sender and receiver. Transmission media is
classified as 1) guided (such as cable and twisted wire) and 2) unguided (which is usually
referred to as wireless transmission).
Additionally, the medium is controlled by the error-detection process (error detection and
correction) to ensure transmission accuracy.
Parity check is an approach to error detection. In ASCII transmissions, the value bit is
selected so that each 7-bit character is attached a 1 for even or odd parity. The receiving
end will check, and if a 1 is inverted to 0, an error is detected. In addition, lost frames and
damaged frames can occur when data is sent in frame sequence. Error control
techniques include positive acknowledgment, retransmission after time-out, negative
acknowledgement, and retransmission. Additionally, as an example of satellite
transmission media, Kepler’s law is reviewed for calculating the period a signal reaches
earth for satellite transmissions. The orbit section and assignment were extracted from
Forouzan (2007, p. 479).
SLP 2 reviews sections 7 and 9 of the Data Communication and Networking e-textbook.
Orbit
An artificial satellite needs to have an orbit-the path in which it travels around the Earth.
The orbit can be equatorial, inclined, or polar. The period of a satellite, the time required
for a satellite to make a complete trip around the Earth, is determined by Kepler’s law,
which defines the period as a function of the distance of the satellite from the center of
the Earth.
Example 1
What is the period of the Moon, according to Kepler’s law?
Period:::: C x distance1.5
Here C is a constant approximately equal to 1/100. The period is in seconds and the
distance in kilometers.
Solution
The Moon is located approximately 384,000 km above the Earth. The radius of the Earth
is 6,378 km. Applying the formula, we get:
Period = 1~(384,000 + 6,378) L5
2,439,090 5 = 1 month
100
Example 2
According to Kepler’s law, what is the period of a satellite that is located at an orbit
approximately 35,786 km above the Earth?