Remote Sensing C

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bhavjain
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Remote Sensing C

Postby bhavjain » September 6th, 2016, 8:47 pm

Short Event Description: Participants will use remote sensing imagery, data and computational process skills to complete tasks related to climate change processes in the Earth system.

What is the difference between active and passive sensing?
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Re: Remote Sensing C

Postby zyzzyva980 » September 6th, 2016, 9:52 pm

Short Event Description: Participants will use remote sensing imagery, data and computational process skills to complete tasks related to climate change processes in the Earth system.

What is the difference between active and passive sensing?
This is a great question to start with because it will be on literally every Remote Sensing test you take this year. Know the answer to this question.
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Re: Remote Sensing C

Postby EastStroudsburg13 » September 7th, 2016, 5:07 am

Short Event Description: Participants will use remote sensing imagery, data and computational process skills to complete tasks related to climate change processes in the Earth system.

What is the difference between active and passive sensing?
This is a great question to start with because it will be on literally every Remote Sensing test you take this year. Know the answer to this question.
Confirmed. I don't think I ever had one without it.
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Re: Remote Sensing C

Postby Unome » September 7th, 2016, 5:28 am

Hopefully I remember this correctly
Active - the sensor emits radiation and detects its reflection. Passive - the sensor detects the reflection of radiation from an outside source (e.g. the sun).
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Re: Remote Sensing C

Postby bhavjain » September 7th, 2016, 5:55 am

Unome Correct! Your turn.
2017 Science Olympiad - (Invites TBD/Reg/State/Nats) - Division C

Anatomy: (-/-/-/-)
Astronomy: (-/-/-/-)
Disease Detectives: (-/-/-/-)
Ecology: (-/-/-/-)
Microbe Mission: (-/-/-/-)
Remote Sensing: (-/-/-/-)
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Re: Remote Sensing C

Postby dcrxcode » November 19th, 2016, 6:45 pm

Restarting this...

Using the term scattering in your answer, why is the sky blue?

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Re: Remote Sensing C

Postby Unome » November 20th, 2016, 6:19 am

Answer
The smaller particles in the air disperse sunlight via Rayleigh scattering, which causes light to be visible from all directions. Since Rayleigh scattering is more effective at shorter wavelengths, blue light is scattered more than longer colors.

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Re: Remote Sensing C

Postby hearthstone224 » December 22nd, 2016, 2:41 pm

Restarting this x2!

This isn't really much of a question you might see on a test, but I'm still curious.

What does blackbody radiation and blackbodies have to do with remote sensing?

I've read through the rules and tried to define the terms.. Most of the first part have something to do with blackbody radiation (Planck's function, Wies' law, so on)

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Re: Remote Sensing C

Postby jonboyage » December 22nd, 2016, 3:51 pm

Answer
Blackbody radiation is when a blackbody emits radiation when at different temperatures. When a blackbody has a certain temperature, it has a specific wavelength at which it emits the most of its radiation (peak emission). If we treat the Earth's surface as a blackbody, then we can measure the temperature of a surface using the radiation emitted. For example, if the surface is 300 kelvin, then the peak emission is about 10 micrometers. This is why many satellites are tuned to be able to detect 10 micrometer radiation when observing the Earth. Other satellites, such as Terra, which have the instrument MODIS, are able to detect fire hot spots by measuring wavelengths of about 3 micrometers, representing temperatures of approximately 1000 kelvin.

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Re: Remote Sensing C

Postby hearthstone224 » December 27th, 2016, 10:07 am

Oh, so basically the blackbody radiation is used to find the surface temperature of something?

And can someone define blackbody for me? I got it as "a physical body that absorbs all EM radiation regardless of frequency or angle of incidence."
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Re: Remote Sensing C

Postby windu34 » December 27th, 2016, 10:34 am

Oh, so basically the blackbody radiation is used to find the surface temperature of something?

And can someone define blackbody for me? I got it as "a physical body that absorbs all EM radiation regardless of frequency or angle of incidence."
A blackbody can be any object that absorbs any amount of EM radiation. Your definition is of a perfect blackbody (such as a black hole).
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Re: Remote Sensing C

Postby hearthstone224 » December 27th, 2016, 1:21 pm

Alright, if people don't mind I'll move on to the next question.

What does a sun synchronous (SS) orbit mean? The A-Train satellites work together in this type of orbit, according to the wiki.
End of freshman season. Good luck to everyone! No state for us, but nevertheless great season. Regional was out of 12 teams. (CLC)

Mat Sci-> Second at regionals
RSensing -> First at regionals
Towers-> Third at regionals.

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Re: Remote Sensing C

Postby Private Wang Fire » December 27th, 2016, 9:19 pm

Alright, if people don't mind I'll move on to the next question.

What does a sun synchronous (SS) orbit mean? The A-Train satellites work together in this type of orbit, according to the wiki.
I think it's when they pass the same point on the earth at the same time every day. A-Train crosses the equator at like 1pm or something so it's called the Afternoon Train or something like that.

Also low key I think we're doing the question marathon thing wrong lol.
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Re: Remote Sensing C

Postby windu34 » December 27th, 2016, 10:57 pm

Alright, if people don't mind I'll move on to the next question.

What does a sun synchronous (SS) orbit mean? The A-Train satellites work together in this type of orbit, according to the wiki.
I think it's when they pass the same point on the earth at the same time every day. A-Train crosses the equator at like 1pm or something so it's called the Afternoon Train or something like that.

Also low key I think we're doing the question marathon thing wrong lol.
Explanation sounds about right
We are def doing this wrong...
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Re: Remote Sensing C

Postby jonboyage » December 30th, 2016, 9:36 pm

I think the way it's supposed to work is one person asks a question, and then someone else answers. The person that answered then asks another question. Here, I'll start us off. How do RAR and SAR work,and what are their uses and advantages over the other?
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