Spacegate Station Academy Lesson 2
Accuracy, Precision and ASCII • Unit 1 Accuracy and Precision • Unit 2 American Standard Code for Information Interchange • Unit 3 The ASCII Table • Practice Calculations
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Lesson 2 - Accuracy, Precision, and ASCII
Unit 1 – Accuracy and Precision 1. Accuracy and precision are two important factors when taking data measurements.
2. Both accuracy and precision reflect how ______a measurement is to an ______value.
3. An accurate measurement has no ______.
4. Accuracy is how close a value is to its ______value.
5. Precision is how ______results are when measurements are ______.
Unit 2 What is ASCII?
6. Computers deal with numbers, so to get them to work with ______we need to represent each ______as a number.
7. When the computer displays text, what it has done is ______the numbers into text so that ______can understand it.
8. For text ______to be stored and processed by all computers, it is important that they all ______data in the same way.
9. A ______method was created that defined what numbers should be used to represent all the ______in the English language.
10. This method was called the American Standard for Information ______or ASCII.
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Unit 3 The ASCII Table
11. The ASCII table defines all numbers between ____and _____.
12. The numbers from 0 to 31 represent ______characters, meaning characters that are not directly ______because they provide ______to the computer.
13. These characters control how the data should be interpreted. a. ______- represents a new line. b. ______- indicates the end of a string of text c. ______- indenting text d. ______- deletes the previous character
14. Note that there are different hex numbers for ______and ______letters.
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ASCII Table Practice
The computer terminal that allows direct data input to the maneuvering engines on Spacegate Station only accepts hexadecimal data input for processing the commands to operate. Normally, this input is transferred to the computer terminal automatically by the Station’s Navigation Computer, which receives its information from Mission Control. Instructions: In Lesson One you determined the Present Orbit Location and the Desired Orbit Location of Spacegate Station in its orbit. You will now practice converting the command values into hexadecimal data so this information can be entered directly into the computer controlling the maneuvering engines. Convert the Command 1, Command 2, Value, and Command 3 for each line into hexadecimal data using the ASCII table provided. Do not place spaces or commas between numbers. Problem 1
Input Data Command 1 Command 2 Value Command 3 ASCII Code Present Orbit Location Start of Text Device Control 1 K27 Carriage Return Desired Orbit Location File Separation Device Control 2 M27 Null
Problem 2
Input Data Command 1 Command 2 Value Command 3 ASCII Code Present Orbit Location Start of Text Device Control 1 J21 Carriage Return Desired Orbit Location File Separation Device Control 2 M21 Null
Problem 3
Input Data Command 1 Command 2 Value Command 3 ASCII Code Present Orbit Location Start of Text Device Control 1 F14 Carriage Return Desired Orbit Location File Separation Device Control 2 C14 Null
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