Satellite navigation

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/satellite-navigation

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the primary GNSS constellations?GPS (USA), GLONASS (Russia), Galileo (Europe), BeiDou (China)
2. What is the speed of signal propagation?Approximately 299,792,458 meters per second (speed of light)

Ephemeris Data: Precise orbital information broadcast by satellites, detailing their path and position.
Pseudorange: The apparent distance between a satellite and a receiver, calculated using signal travel time and accounting for clock errors.
Ionospheric Delay: The slowing of radio signals as they pass through the Earth's ionosphere, a factor that must be corrected for accurate positioning.
Multipath Interference: When satellite signals bounce off surfaces (like buildings) before reaching the receiver, causing errors.