NASA | Landsat Looks to the Moon

The video explains the process of maneuvering a spacecraft at night to avoid sunlight, aligning instruments towards the Moon, and using a push broom instrument with detectors to scan the Moon. The scanning is done in a plow-like pattern over two orbits. The Moon is used as a stable reference to detect drifts in the instrument, ensuring accurate Earth observations.

Why are spacecraft maneuvers conducted during nighttime?

• To improve communication

• To avoid sunlight interference

• To save energy

• To reduce temperature

What is the primary function of the push broom instrument?

• To measure temperature

• To build images using detectors

• To clean the spacecraft

• To communicate with Earth

How many detectors does each module of the focal plane have?

• 500

• 1000

• 200

• 7000

Why is the Moon used as a reference for calibration?

• It has a magnetic field

• It is brighter than the Sun

• It has stable conditions

• It is closer to Earth

What advantage does using the Moon provide in terms of instrument calibration?

• It increases the lifespan of the instrument

• It reduces the need for human intervention

• It helps in detecting instrument drifts accurately

• It allows for faster data processing