Remote Sensing C

winneratlife
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Re: Remote Sensing C

Postby winneratlife » May 12th, 2011, 11:46 am

If a satellite-based pushbroom sensor has a row of 9,000 CCD cells aligned perpendicular to the satellite's motion, and the swath width is 270 kilometers, what is the ground sampling distance (spatial resolution) in meters?
And I just realized how to do this question *facepalm* so I'll explain it if anyone needs me too.
If you imagine the pushbroom, you have 9000 cells lined up. Width is 270000 meters.
Each cell encompasses 30 meters.

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The Eviscerator
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Re: Remote Sensing C

Postby The Eviscerator » May 12th, 2011, 2:00 pm

The answer to the first question is 30m. It is that simple.

Now as for the second question, you are not even close haverstall. I'll give you some more time to think about it and try it again until I post the answer on the answer key.

We got 6th at our state competition, but we only lost to first by 6 points, and we made a bunch of stupid mistakes, so we could've easily gotten first. Hence the repetitive facedesk.

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Re: Remote Sensing C

Postby haverstall » May 12th, 2011, 9:05 pm

Ok, so was looking at this question again, and realized that maybe instead of times, it's talking about minutes and seconds as in degrees. So is the answer 60 minutes?
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Re: Remote Sensing C

Postby The Eviscerator » May 12th, 2011, 9:13 pm

Actually, haverstall, I looked at what you did the first time, and you did everything right, but you accidentally used the Earth's radius instead of diameter, so you were off by a lot. The answer is 40 seconds.

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Re: Remote Sensing C

Postby haverstall » May 12th, 2011, 9:37 pm

fffffffffffffff....i'm feeling like the dumbest person on this planet.

yup, it's 0.67 minutes or 40 seconds. Good to know I had the right process.
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Re: Remote Sensing C

Postby haverstall » May 22nd, 2011, 2:41 pm

So..nats test....

Did anyone study ASTER or ALI before? We had basic info on ASTER, but nothing on ALI.
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Re: Remote Sensing C

Postby The Eviscerator » May 23rd, 2011, 10:42 am

Yeah... We knew ASTER, but knew nothing about ALI and AVIRUS. That completely screwed us over and made us not medal. We got 8th :(

Congrats on 6th place haverstall......................................

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Re: Remote Sensing C

Postby haverstall » May 23rd, 2011, 1:49 pm

Thanks.

Btw, I should probably thank you for providing those two questions. If you hadn't, I probably wouldn't have answered those questions on the test.

I also need to figure out spatial resolution, or just resolution in general. Those questions stumped me.
Mounds View Science Olympiad 2008-2012 || 6th, Remote Sensing, 2011 Nationals

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Re: Remote Sensing C

Postby The Eviscerator » May 23rd, 2011, 5:10 pm

No problem... gaahhhh, this was the first time in 3 years or something that my school didn't medal in Remote Sensing at nationals... I'm such a failure :cry:

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Re: Remote Sensing C

Postby zyzzyva980 » May 23rd, 2011, 5:13 pm

Heya, top 10 at nats, nothing to be ashamed of. There are plenty of worthy competitors who didn't make it. Be glad you got there.
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