Europe launches laser satellite to space

The video tutorial explains the European Data Relay System (EDRS), focusing on the EDRS C satellite joining its sister satellite, EDRS A, in a geostationary orbit. The EDRS uses lasers to collect data from lower orbit satellites called Sentinels, which monitor Earth's surface. The EDRS can relay data back to Earth at high speeds, significantly reducing the delay in data transmission, allowing near real-time data relay.

What is the primary function of EDRS C in relation to EDRS A?

• To monitor the Earth's weather patterns

• To join EDRS A in a geostationary orbit

• To replace EDRS A in orbit

• To operate independently from EDRS A

At what altitude do the EDRS satellites operate?

• 42,164 kilometers

• 786 kilometers

• 693 kilometers

• 35,786 kilometers

What technology do the EDRS satellites use to gather data from Sentinels?

• Microwaves

• Infrared sensors

• Radio waves

• Lasers

Which Sentinel satellite orbits at 693 kilometers?

• Sentinel 4

• Sentinel 3

• Sentinel 2

• Sentinel 1

How has the addition of EDRS 3 improved data transmission?

• By allowing data to be sent in real time

• By increasing the data rate to 3.6 Gigabits per second

• By reducing the need for ground stations

• By enabling data storage in space