land-cover-lab
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El Paso Community College *
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Course
10332
Subject
Astronomy
Date
Apr 3, 2024
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docx
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Astronomy/Physical Science
Land Cover Lab
EPCC
You will be collecting atmospheric and surface data using your GLOBE Observer (GO) app on two separate days of your choosing or as instructed by your professor. For each day you will record one surface and atmospheric observation in the morning and another one in the afternoon; you will have a total of four observations over two days. Collect both atmospheric and surface data together.
Be sure to watch the following videos on how to conduct a cloud and land cover observations, as well as how to interpret satellite data:
--cloud observations: https://youtu.be/J9KgKLVFu9U?si=BGTqwR48KFMhro_P
--basic land observations: land-cover-data-tutorial.mp4
--access your observation data: get_data.mp4
--lab tutorial: landcover-lab-tutorial_video1239099497.mp4
Table 1. GO SITE ID and SITE NAME
Cloud SITE ID
Cloud SITE NAME
Land cover SITE ID
Land cover SITE NAME
Date & time
184351
13RCR706137
294713
13RCR702137
2/22/24 10:30AM
339910
13RCR731140
2/22/24 5:30PM
339857
13RCR761107
339858
13RCR760108
2/24/24 10:00AM
224358
13RCR759108
339913
13RCR762105
2/24/24 7:00PM
Land cover
Using your GO app, collect surface data using the land cover protocol. Be sure to record the SITE ID and SITE NAME in table 1. On a separate document, describe your surroundings within 250 words. Clouds
Using your GO app, collect cloud and atmospheric data using the cloud protocol. Be sure to record the
SITE ID and SITE NAME in table 1. On a separate document, describe the atmospheric conditions that you experience (i.e. temperature, wind) within 250 words. Satellite data
Be sure to collect/download the satellite data that corresponds to the days of your data collection. In table 2, place the black and white image (VIS) and infrared image (IR) in the corresponding labeled sections. Be sure to enter the date and time of each image as well. Table 2. VIS and IR images
Astronomy/Physical Science
Land Cover Lab
EPCC
Date and time:
Date and time:
Date and time:
Date and time:
Date and time:
Date and time:
Date and time:
Date and time:
Questions: On a separate document, answer concisely within 250 words per question.
Astronomy/Physical Science
Land Cover Lab
EPCC
1.
What differences and similarities did you notice between the two days of data collection? Any significant changes due to weather on the land? Some differences that I noticed was that there would lots of clouds one day or in one area and other days there would be a clear sky. There was also one photo that came back very blue which was very strange.
2.
Study the IR images you collected, as well as the observations you took (i.e. your photos) in the GO app under My Observations
. What can you tell between the IR images taken during the
morning versus those taken during the afternoon with respect to temperature? THE mornings,
after a cool night, ground and surface temperatures are lower. Vegetation may still be recovering from the cooler night temperatures, affecting their thermal properties and heat absorption. By the afternoon, the sun is heating the Earths surface for hours cause it to rise. Urban areas, roads and other surfaces with high thermal inertia retained more heat in the after leading to higher readings. 3.
Where there any clouds in the images? How can you decipher between clouds and surface features using both IR and VIS images? Yes, there were clouds in the images. Clouds appear colder in IR images due to high altitude and composition, which results in less thermal radiation on the Earth surface. Surface features like buildings, roads emit different levels of thermal radiation making them distinguishable from clouds. In VIS, clouds are white or grey depending on thickness, altitude and composition. Surface features exhibit colors, textures and shapes that differ from the appearance of clouds. 4.
Answer this question if there were clouds in any of your observations: What details could you see from below of the clouds that were different from the IR and VIS images. Shadows cast by clouds can give information that are no clear in IR and VIS. The height, and density of a cloud as well as the direction of sunlight that satellite doesn’t see. Depth perception, from below three-dimensional nature of clouds becomes more apparent, revealing of how thick and the height they have. Helps us understand what is captured two dimensionally.
5.
Review your land cover observation photos you took and compare them with the IR images for
that day. Are there any key features that the IR image can convey that your photos cannot, and
vise versa?
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