Want to see the real capabilities of these Sats?

03-15-2007, 03:54 AM

Put these numbers in the search sidebar of google earth, then zoom in.

15.298683 19.429651

Surely to blow you away!

Chade · 03-15-2007, 05:17 AM

...except it's not a satellite.

TomServo · 03-15-2007, 01:26 PM

Yep, that is a plane flyover. The small size and angle give that way easily.

Guest_Jim_* · 03-15-2007, 02:39 PM

I think I heard in a History Channel documentary that the best resolution you can get with a satellite is 5m.
Before somebody says that's just how good public satellites are and that government satellites can do better think about it, if you really could do better somebody, not connected with a government, would also have developed the technology. Besides if you had better than 5m wouldn't that make the area you actually capture in the image very small, to the point it would useless for espionage?

withak · 03-15-2007, 03:12 PM

Resolution is the size (in real-world dimension) of the pixels.

For example, WW's default landsat layer is 30m/pixel and the i-cubed and OnEarth landsat layers are ~15m/pixel.

Commercial satellites that can take 60cm resolution images are pretty standard I think.

m_k · 03-15-2007, 08:24 PM

Reconnaissance satellites such as KH-11 are said to have theoretical resolution of 15cm/px. I think you can't go much further than this... main reasons are atmosphere and the laws of optics.

TomServo · 03-15-2007, 09:32 PM

We now have to kill you.....

Guest_Jim_* · 03-15-2007, 10:20 PM

Quote:

Originally Posted by withak

Resolution is the size (in real-world dimension) of the pixels.

For example, WW's default landsat layer is 30m/pixel and the i-cubed and OnEarth landsat layers are ~15m/pixel.

Commercial satellites that can take 60cm resolution images are pretty standard I think.

Quote:

Originally Posted by m_k

Reconnaissance satellites such as KH-11 are said to have theoretical resolution of 15cm/px. I think you can't go much further than this... main reasons are atmosphere and the laws of optics.

Then whatever I heard was is now outdated, but, out of curiosity, how large of an area could a satellite with that high of a resolution cover at a time?

Quote:

Originally Posted by TomServo

We now have to kill you.....

Me or m_k for knowing about the KH-11 satellites?

PostFatal_ · 03-15-2007, 10:28 PM

Quote:

Originally Posted by TomServo

We now have to kill you.....

This is a KH-11 photo from 1998 http://i5.photobucket.com/albums/y167/PostFatal/10.jpg

I'm sure things have become better since then.

m_k · 03-15-2007, 10:39 PM

Quote:

Originally Posted by Guest_Jim_*

Then whatever I heard was is now outdated, but, out of curiosity, how large of an area could a satellite with that high of a resolution cover at a time?

QuickBird 16.5x16.5km http://www.digitalglobe.com/about/quickbird.html
IKONOS 11x11km http://www.geoeye.com/products/image...os/default.htm

(Compare with Landsat 7 - 185km http://ltpwww.gsfc.nasa.gov/IAS/hand...tml#section5.2)

03-15-2007, 03:54 AM	#1
Unregistered Guest Posts: n/a	Want to see the real capabilities of these Sats? Put these numbers in the search sidebar of google earth, then zoom in. 15.298683 19.429651 Surely to blow you away!

03-15-2007, 05:17 AM	#2
Chade Senior Member Join Date: Apr 2006 Posts: 404	...except it's not a satellite. __________________ Machine. Unexpectedly, I’d invented a time - Alan Moore

03-15-2007, 01:26 PM	#3
TomServo God. Root. What is difference? Join Date: Sep 2004 Location: Eastern Pennsylvania Posts: 2,856	Yep, that is a plane flyover. The small size and angle give that way easily. __________________ Earth is Square blog PUBLIC NOTICE AS REQUIRED BY LAW: Any use of this forum post, in any manner whatsoever, will increase the amount of disorder in the universe. Although no liability is implied herein, the consumer is warned that this process will ultimately lead to the heat death of the universe.

03-15-2007, 02:39 PM	#4
Guest_Jim_* Needs a life Join Date: Dec 2005 Posts: 698	I think I heard in a History Channel documentary that the best resolution you can get with a satellite is 5m. Before somebody says that's just how good public satellites are and that government satellites can do better think about it, if you really could do better somebody, not connected with a government, would also have developed the technology. Besides if you had better than 5m wouldn't that make the area you actually capture in the image very small, to the point it would useless for espionage? __________________ I don't spread the word, I spread the world! Road Map for World Wind development and release I do not know .Net or DirectX.

03-15-2007, 03:12 PM	#5
withak What? Join Date: Apr 2005 Location: San Francisco, California Posts: 2,464	Resolution is the size (in real-world dimension) of the pixels. For example, WW's default landsat layer is 30m/pixel and the i-cubed and OnEarth landsat layers are ~15m/pixel. Commercial satellites that can take 60cm resolution images are pretty standard I think. Last edited by withak; 03-15-2007 at 03:18 PM.

03-15-2007, 08:24 PM	#6
m_k Bored Explorer Join Date: Nov 2004 Location: Warsaw, Poland Posts: 1,737	Reconnaissance satellites such as KH-11 are said to have theoretical resolution of 15cm/px. I think you can't go much further than this... main reasons are atmosphere and the laws of optics. __________________ Hot stuff: FAQ, forum search, DirectX, .NET, Video Card Compatibility list

03-15-2007, 09:32 PM	#7
TomServo God. Root. What is difference? Join Date: Sep 2004 Location: Eastern Pennsylvania Posts: 2,856	We now have to kill you..... __________________ Earth is Square blog PUBLIC NOTICE AS REQUIRED BY LAW: Any use of this forum post, in any manner whatsoever, will increase the amount of disorder in the universe. Although no liability is implied herein, the consumer is warned that this process will ultimately lead to the heat death of the universe.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
real time app..	aneeshhegde	Technical Support	2	01-13-2007 10:11 AM
real time satalite tracking	Unregistered	Suggestion Box	5	06-09-2006 02:33 PM
Tracking the space shuttle in real time	DownUnder	Add-ons & Scripts	9	09-06-2005 10:10 PM
FOUND REAL CROP CIRCLE!!!	aiasib@gmail.com	Hotspots	7	05-16-2005 01:10 PM
WHEN A REAL TIME WORLD WIND?	SJGSM	Suggestion Box	8	04-23-2005 06:35 PM