Satellite Navigation — Questions and answers

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What problem did Major General Bradford Parkinson want to solve?

Choices

  1. People were getting lost in space.
  2. Sailors and pilots needed more accurate ways to know their location. ✓
  3. There were too many stars in the sky.
  4. Globes were not accurate enough for navigation.

Answer: Sailors and pilots needed more accurate ways to know their location.

From page 1

Who was Roger L. Easton?

Choices

  1. A famous sailor who used sextants.
  2. A brilliant physicist who worked on Timation satellites. ✓
  3. A pilot who relied on radio beacons.
  4. A general who wanted more precise navigation.

Answer: A brilliant physicist who worked on Timation satellites.

From page 3

What was the name of the program launched by the U.S. Department of Defense to build a global satellite navigation system?

Choices

  1. Timation Program
  2. Navstar Program ✓
  3. Celestial Fixes Program
  4. LORAN Program

Answer: Navstar Program

From page 4

What is the main purpose of the atomic clocks in a GPS satellite?

Choices

  1. To tell the time of day to people on Earth.
  2. To generate precise timing signals and data about the satellite's position. ✓
  3. To help the satellite fly faster in space.
  4. To make the satellite glow brightly at night.

Answer: To generate precise timing signals and data about the satellite's position.

From page 6

How many satellites does a GPS receiver need to get an exact three-dimensional position?

Choices

  1. One satellite.
  2. Two satellites.
  3. Three satellites.
  4. At least four satellites. ✓

Answer: At least four satellites.

From page 7

What was the initial primary purpose of GPS when it achieved Full Operational Capability in 1995?

Choices

  1. For civilian cars and phones.
  2. For scientific research.
  3. For military operations. ✓
  4. For tracking wild animals.

Answer: For military operations.

From page 8

What was 'Selective Availability'?

Choices

  1. A special feature for all GPS users.
  2. A policy where the government made the public GPS signal less accurate. ✓
  3. A type of military weapon.
  4. A game played by GPS engineers.

Answer: A policy where the government made the public GPS signal less accurate.

From page 9

Besides GPS, what are some other satellite navigation systems mentioned?

Choices

  1. Microsoft, Apple, and Google.
  2. GLONASS, Galileo, and BeiDou. ✓
  3. Sextants, LORAN, and Timation.
  4. X, Y, and Z coordinates.

Answer: GLONASS, Galileo, and BeiDou.

From page 10