Whisk broom how to#

Push broom scanners, also sometimes referred to as along track scanners, use a line of detectors arranged perpendicular to the flight direction of the spacecraft. (The OLI instrument on Landsat 8 uses a pushbroom design.) ДЄll Landsat sensors prior to Landsat 8 use the whisk broom design. A whisk broom scanner sweeps in a direction perpendicular to the flight path, collecting one pixel at a time. The moving parts make this type of sensor expensive and more likely to wear out.ДЇigure 1. The mirror moves back and forth, to collect measurements from one pixel in the image at a time ( Fig. Whisk broom scanners, also sometimes referred to as spotlight or across track scanners, use a mirror to reflect light onto a single detector.

Whisk broom how to#

Knowing which type of scanner collected your imagery can help you better understand your data and how to work with it. As anyone facing any type of complicated task can tell you, it is important to understand your tool. Specifically, I've been thinking about the two types of sensors commonly used for passive, optical, satellite imaging: push broom and whisk broom. Perhaps not coincidentally, I've been thinking about some cleaning tool terminology commonly used in the Remote Sensing world.

We've been doing a lot of cleaning in Boulder this week, after our historic flood.