We are continuing our celebration of the 50th year of the US Landsat satellite imagery program. This week we are heading to the lake – Clear Lake, Iowa, located in north central Iowa.
Below are four images showing Summer Solstice (6/13/2019), Fall Equinox (9/17/2019), Winter Solstice (12/22/2019), and Spring Equinox (3/18/2019) from Landsat 8. The images are presented in color infrared which shows vegetation in red rather than green for better contrast.
Observations:
- At Summer Solstice things are still greening up while at Fall Equinox the fields are all green and some are beginning to be harvested.
- Observe the different states of the lake: open water, snow covered, and frozen.
- The topography of the landscape (ie. hills and roughness) are much more apparent with snow on the ground. In the summer/fall images, it all looks flat.
What else do you notice? Happy Observing!
