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Aerosols Protocol Activity - Contenido educativo

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Subido el 28 de mayo de 2007 por EducaMadrid

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NASA Connect segment involving French students in an activity called the Aerosols Protocol. The segment investigates how the sun's light is absorbed by particles in the atmosphere.

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Merci Dr. Tonray. Well, now that you are experts on aerosols, let's head to Collège Cantolando, 00:00:00
located in Bordeaux, France, for Part 2 of this program's hands-on activity, the Globe 00:00:09
Aerosol Protocol. 00:00:15
Bonjour! Nous sommes des élèves du Collège Cantolando CESTAS à Bordeaux, en France. 00:00:16
NASA Connect nous a demandé de présenter la deuxième partie de ce programme de travaux 00:00:27
pratiques. 00:00:30
In this activity, called Aerosols Protocol, you will use a sun photometer to measure the 00:00:31
aerosol optical thickness of the atmosphere, or how much of the sun's light is scattered 00:00:37
or absorbed by particles suspended in the air. Remember, you can download a copy of 00:00:44
the educator guide containing directions and list of materials from the NASA Connect 00:00:49
website. 00:00:54
When you are ready to go outside, put your sun photometer in an insulated bag to keep 00:00:55
it at room temperature. Putting your sun photometer in a bag will help minimize any temperature 00:01:00
sensitivity problems. 00:01:05
To begin taking measurements with your sun photometer, flip the power switch on and then 00:01:07
select the green channel. Hold the instrument in front of you about chest high. Point the 00:01:12
sun photometer at the sun and then find the spot made by the sun as it shines through 00:01:17
the front alignment bracket. Remember, guys, never look directly into the sun. Use the 00:01:23
mark on the rear alignment bracket as a guide to align the sunspot until it rests on the 00:01:29
color dot. 00:01:35
It is normal for the readout to fluctuate within a few millivolts. Record only the highest 00:01:36
reading that you see over a period of about 15 seconds. Record the value on the data sheet 00:01:42
and the time of the reading to within 15 seconds. 00:01:48
Now take the dark voltage reading. Cover the two holes on the sun photometer. Record 00:01:52
the value of the dark voltage reading on the data sheet. Switch to the red channel. Record 00:01:58
the maximum voltage and the time just as you did with the green channel. Then take the 00:02:04
dark voltage reading again just like before. You need to repeat the process for the green 00:02:10
and red channels two more times, giving you a total of three data points for each channel. 00:02:16
Next, using your cloud chart as a guide, observe and record cloud conditions. Determine 00:02:22
what types of clouds are in the sky. Record your observation on the data chart. Next, 00:02:28
determine the percentage of cloud cover and record the value on the data sheet. Now you 00:02:34
need to observe the sky conditions. What is the sky color? Is the sky clear or hazy? Is 00:02:39
the sky obscured by fog, smoke, or haze? Record these observations on the data sheet. Finally, 00:02:46
record the current temperature. When you get back into your classroom, log on to the following 00:02:54
website. You will record all your data into the database. The database will automatically 00:02:59
convert your voltage readings to aerosol optical thickness. To learn more about assessing a 00:03:05
sun photometer, check out the NASA Connect website. 00:03:10
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Idioma/s:
en
Materias:
Matemáticas
Niveles educativos:
▼ Mostrar / ocultar niveles
      • Nivel Intermedio
Autor/es:
NASA LaRC Office of Education
Subido por:
EducaMadrid
Licencia:
Reconocimiento - No comercial - Sin obra derivada
Visualizaciones:
488
Fecha:
28 de mayo de 2007 - 16:53
Visibilidad:
Público
Enlace Relacionado:
NASAs center for distance learning
Duración:
00′ 05″
Relación de aspecto:
4:3 Hasta 2009 fue el estándar utilizado en la televisión PAL; muchas pantallas de ordenador y televisores usan este estándar, erróneamente llamado cuadrado, cuando en la realidad es rectangular o wide.
Resolución:
480x360 píxeles
Tamaño:
19.53 MBytes

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