NASA | Getting the Big Picture

Remote sensing allows us to measure Earth's features without physical contact, using NASA's aircraft and satellites. It employs passive and active methods to monitor environmental changes, such as soil moisture, snowpack, and ice sheets. Remote sensing overcomes challenges like rugged terrain and vast oceans, providing comprehensive data for better climate predictions and understanding of the water cycle. By observing Earth from above, we gain insights into surface, atmospheric, and underground changes globally.

What is the primary purpose of remote sensing as described in the video?

• To replace ground-based instruments entirely

• To measure only the Earth's atmosphere

• To gather data from large areas without physical contact

• To physically measure the Earth's surface

Which of the following is a method used in remote sensing?

• Neither active nor passive sensing

• Both active and passive sensing

• Passive sensing only

• Active sensing only

How does the Global Precipitation Measurement mission contribute to remote sensing?

• By providing data only for oceanic regions

• By filling gaps where ground measurements are insufficient

• By replacing all ground-based radars

• By focusing solely on temperature changes

What is one advantage of using satellites for remote sensing?

• They can only measure atmospheric changes

• They are only useful for short-term data collection

• They offer a complete view of Earth's changes over time

• They provide less coverage than ground-based instruments

Why is a long data record important in remote sensing?

• It reduces the need for new technology

• It helps in making better predictions about the water cycle and climate

• It focuses on short-term weather patterns

• It is only useful for historical analysis