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Re: Remote Sensing C

Posted: April 6th, 2011, 7:36 am
by greywolfst1
I haven't read through the entire forum, so forgive me if this is redundant.

Besides Nebraska's Remote tests, has anyone had NDVI show up on a test? I'm nervous that it will appear on the Nationals test, and I'll have no clue what it means.
NDVI = Normalized Difference Vegetation Index = (NIR-Red)/(NIR+Red)

In my opinion everyone doing remote sensing should know NDVI because almost everyone who uses remote sensing data for applications in vegetation uses NDVI or and NDVI-based product. I teach NDVI in my Introduction to GIS course because it is so prevalent in the scientific literature.

FYI I am posting the Nebraska State Test for this year.

Re: Remote Sensing C

Posted: April 6th, 2011, 12:32 pm
by Wadhk
I haven't read through the entire forum, so forgive me if this is redundant.

Besides Nebraska's Remote tests, has anyone had NDVI show up on a test? I'm nervous that it will appear on the Nationals test, and I'll have no clue what it means.
Haven't seen that on a test. But, like greywolfst1 said, you might want to know it (or put some info about it on your reference sheet).

Re: Remote Sensing C

Posted: April 6th, 2011, 6:25 pm
by zyzzyva980
I had NDVI at regionals. (Then again, it was copied from the NE regional >.>) I hope to upload some NDVI / EVI stuff to the wiki next time I get the chance, though. You'll probably see it at *some* point in this event.

Re: Remote Sensing C

Posted: April 6th, 2011, 6:33 pm
by Gillen
I have seen NVDI on a couple of questions. Its also useful to know if you need to explain something about using remote sensing to analyze vegetation for a short answer or essay type question.

Re: Remote Sensing C

Posted: April 21st, 2011, 11:03 am
by The Eviscerator
Does anybody think that we will have to be able to calculate the energy of a wave from its wavelength?
The thought just occurred to me, and even though I've never seen it on a test before, it does seem related to the concepts of Remote Sensing.

Re: Remote Sensing C

Posted: April 21st, 2011, 3:19 pm
by EastStroudsburg13
I doubt we would have to do that, that seems more like an Optics question to me (you probably already know that). It's plausible, if someone really wanted to throw competitors for a loop. However, all someone would need is a particularly informative table about the electromagnetic spectrum in your notes (like the one I have), or a small section describing how to do the calculation. It's not hard, just use E=hv and c=(frequency)*(wavelength), so it shouldn't be a problem and shouldn't take up too much space, so if you want you can learn it or put it in your notes somewhere.

Re: Remote Sensing C

Posted: April 26th, 2011, 5:10 pm
by The Eviscerator
Thanks, I think I might put it on the sheets just in case.

Anyways, do you guys study a lot for this event? The resources to study seem kind of limited, yet the tests are more difficult than those of other events in my opinion.

Re: Remote Sensing C

Posted: April 27th, 2011, 12:52 pm
by Wadhk
I practice IDing images, looking up satellites, and memorizing the basics of remote sensing. Its hard to cover everything that's on the tests.

Re: Remote Sensing C

Posted: April 28th, 2011, 3:12 pm
by haverstall
Does anybody think that we will have to be able to calculate the energy of a wave from its wavelength?
The thought just occurred to me, and even though I've never seen it on a test before, it does seem related to the concepts of Remote Sensing.
DEFINITELY. In all of my Remote tests, a question has come up pertaining to this.

Re: Remote Sensing C

Posted: April 28th, 2011, 3:26 pm
by haverstall
Hate to double post, but I was just reading through the forum, and noticed how some people said Remote doesn't seem useful.

Back in March, the rocket carrying Glory, a satellite, exploded, and when I heard the news, I immediately knew it was one of the future A-Train satellites.

I felt so proud of myself.


Ok, there's my two cents.