The previous topic only discussed passive sensors, in this section we will learn about active sensors such as RADAR and LiDAR. Active sensors provide a variety of advantages and new applications in remote sensing.
Assignment/Lab 5 is due this week. Be sure to send in the assignment in Assignment 5 dropbox by 11:59pm on Friday this week.
Topic Summary
Active remote sensing is pushing the boundaries of the field by allowing us to work with wavelengths that are not sufficiently emitted from the sun and collect data at anytime of the day or year. LiDAR has emerged as an important tool for analyzing forest inventories with great detail. We will re-visit LiDAR later in the course to learn how to analyze point-cloud data.
Topic Self-review (For self learning)
Please use the reflection questions below as study guide to conduct self-review for the topic.
What is the difference between active and passive sensors?
How does RADAR work and what are some of its applications?
Why is RADAR able to penetrate the ground?
How does LiDAR work and what are some of its applications?
How does LiDAR detect height (i.e. 3-D)?
FODE009
Requirements Changed
Topic 3.1: Resolutions in Remote Sensing & Orbits and Sensors Module III Summary