5. Sensor Technology

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Objectives

This learning object introduces the contents of unit 5, Sensor Technology.

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This is fifth unit in the module “Remote Sensing for Earth Observation”. The objective of this unit is to introduce the principal characteristics of remote sensing sensors and platforms.

1. Introduction to Unit 5
2. Types and Resolution of Sensors
3. Types of Platform
4. Spatial Resolution
5. Spectral Resolution
6. Radiometric and Temporal Resolution

 

‘Types and Resolution of Sensors’ introduces several important distinctions between different sensing devices and explains how their operation, particularly with respect to resolution, affects the data which can be obtained. This learning object introduces the different aspects of resolution in remote sensing, which are considered in more detail in subsequent objects.

‘Types of Platform’ introduces different types of remote sensing platform and further explains how platform type can influence important data characteristics, including timing and cost.

‘Spatial Resolution’ focuses specifically on the factors which influence spatial resolution and the impacts on the imagery obtained.

‘Spectral resolution’ focuses on the less familiar concept of spectral resolution and explains how this affects our ability to distinguish different land cover types from imagery.

‘Radiometric and Temporal Resolution’ considers the two remaining aspects of resolution. By the end of the unit, students should therefore have a firm understanding of the main interactions between the technology systems used to capture remotely sensed data and the four aspects of resolution which affect the way in which these data can be used and interpreted.

There are practical and reflective activities designed to reinforce students’ learning associated with each of the learning objects.