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Topic: Satellite Image Comparison

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	RS:Principles: Image Processing
		Since the smallest element in a satellite image is a single pixel, resolution describes the area on the Earth's surface represented by a single pixel.
		For example, in a weather satellite image that has a resolution of 1 km, each pixel represents the average brightness value over an area that is 1 km by 1 km.
		A true color image is one for which the colors have been assigned to DN values that represent the actual spectral range of the colors used in the image (blue features appear blue, green features appear green, red features appear red, etc).
	chesapeake.towson.edu /data/image3.asp (701 words)

	Imaging - E.Delta
		Of note, She has recently obtained a 1968 satellite image revealing the extent to which the mound of Tell Tebilla has been cut into over the past 31 years.
		Her preliminary results, which she illustrated at the ARCE 2003 annual meeting, have illuminated the full significance of Tebilla’s Late Period temple, the enclosure wall of which is clearly visible in a 1968 satellite image.
		Satellite image illustrating Tell Tebilla and its environs (Image processing: S. Parcak): Mound of Tebilla coloured red and located slightly left of the centre of the image.
	www.deltasinai.com /image-02.htm (220 words)

	Triangle Project- Key Largo, FL (Site not responding. Last check: 2007-10-31)
		The image to the left is a crop of the original image that was taken by the Space Shuttle and is categorized at the Earth from Space public website as: STS056-097-053 Homestead, Florida, U.S.A. April 1993.
		Image C reveals a triangle on the ocean floor with a circle in the middle.
		For comparison, the surrounding ocean floor appears to be featureless until the triangle is seen which appears to be a raised area due to it's light appearance.
	www.satellitediscoveries.com /discoveries/triangles/triangle_8.html (503 words)

	Satellite Image Comparison
		The image has been annotated with the jetliner flight path entering in the top center of the image and proceeding from top to bottom in the center of the image.
		When the satellite image is compared with the plume model for the same time period, shown at approximately the same scale in Figure 9, a difference in the size of the ash cloud is readily apparent.
		In studies of the few other eruptions where clear images were available, the ash clouds are unmistakable in the satellite image and the model showed excellent agreement with the satellite data.
	www.cs.uaf.edu /~roth/volcano/node8.html (568 words)

	Satellite
		Satellite providers have far surpassed the 20 million mark, a number thought to be unheard of just three short years ago.
		Some satellite followers have said the increased bandwidth has the on-demand capacity and flexibility necessary to support the growth of non-linear content, which could be the most significant programming development in the coming 10 years.
		Satellite ITV in Europe has been ahead of the curve largely because satellite is more widely accessible than Cable and therefore more dominant.
	www.rogertowne.com /Satellite.htm (10524 words)

	Catalog Page for PIA05390
		The images were taken through a narrow filter centered at 938 nanometers, a spectral region in which the only obstacle to light is the carbon-based, organic haze.
		The superimposed grid over the images illustrates the orientation of Titan -- north is up and rotated 25 degrees to the left -- as well as the geographical regions of the satellite that are illuminated and visible.
		A comparison between the Cassini images and the Hubble map indicates that Xanadu is visible as a bright region in the Cassini image on the right.
	photojournal.jpl.nasa.gov /catalog/PIA05390 (795 words)

	EO Newsroom: New Images - Aral Sea
		The image at right was captured by the Moderate Resolution Imaging Spectroradiometer (MODIS) on the Aqua satellite on August 12, 2003, and it shows the rapid retreat of the Sea’s southern half, now separated into a western and eastern half, both of which may face the same bleak future.
		The Landsat image is a combination of six scenes, downsampled to match the resolution of the MODIS image.
		Image obtained from the University of Maryland Global Land Cover Facility.
	earthobservatory.nasa.gov /Newsroom/NewImages/images.php3?img_id=16277 (465 words)

	[No title] (Site not responding. Last check: 2007-10-31)
		Images of NDVI are sometimes referred to as "greenness maps" since they represent the vegetative vigour of plants.
		The primary use of these images is to compare the current state of vegetation with previous time periods, for example the same time in an average year to detect anomalous conditions.
		The bottom image clearly shows the reduction in vegetation growth at this stage in the year compared to the average, with yellow and red colours apparent, especially over Zimbabwe, Zambia and DRC.
	www.alertnet.org /thefacts/satelliteimages/487717 (352 words)

	The Three Types of Weather Satellite Imagery (Site not responding. Last check: 2007-10-31)
		Each of these channels on the satellite sensors is sensitive to energy (electromagnetic energy) at a particular range of frequencies, therefore each type provides a different view of the Earth, its atmosphere, and its oceans.
		A VIS image is an approximation of the Earth's albedo, that is, the percentage of
		Images that are taken in these channels are used to locate large concentrations of water vapor and water vapor gradients in the middle and upper troposphere (this is the lowest layer of the atmosphere and the location of the most significant weather).
	henry.pha.jhu.edu /ssip/asat_int/types.html (745 words)

	Satellite Radio Comparison - Special Features - Car Audio Magazine
		At that speed and distance, the two satellites are "parked" over the same spot of the earth 24 hours a day, 7 days a week, 365 days a year.
		The XM satellites are much lower in the horizon, as they are over the equator and have to be aimed north in order for their "foot print" to cover the USA.
		The Sirius satellite orbits are radically tilted and they travel at the same 17,500 miles per hour that the XM satellites do, but their paths take them as close as 15,700 miles over the backside of the earth to as much as 28,000 miles high when the satellites are over the USA.
	www.caraudiomag.com /specialfeatures/0310cae_satellite_radio_comparison/index.html (2716 words)

	Comparison of Ground and Space Images of A Globular Cluster (SEDS HST Archive 99 of 135) (Site not responding. Last check: 2007-10-31)
		This is a comparison of pictures of the core of the globular cluster NGC 6624, as imaged with the European Space Agency's Faint Object Camera aboard NASA's Hubble Space Telescope.
		This comparison image demonstrates that Hubble's high resolution and ultraviolet sensitivity allow astronomers to pick out the faint blue counterpart to an X-ray burster buried in the globular cluster.
		When the two images are lined up, the UV-bright star coincides with the inconspicuous star that is identified by tic-marks in the right-hand image.
	www.seds.org /hst/ngc6624.html (361 words)

	Satellite internet access FAQ'S (Site not responding. Last check: 2007-10-31)
		As a comparison, typical dial-up speeds are in the range of 28.8kbps or 56kbps.
		With satellite Internet, as long as you have a clear view that allows you to point the satellite dish towards the satellite, you can receive the signal.
		Our satellite Internet is used mostly in places where DSL isn’t available, thereby giving people who live in rural areas a true broadband solution.
	www.satellite4internet.com /faqs.html?q=3 (1585 words)

	Satellite Imagery FAQ - 3/5
		Image samples are usually called _pixel_ or _pel_ after the combination of "picture" and "element".
		In our case the image statistics were unchanged after georectification although it is probable that some pixels may be dropped or replicated (but when you georeference the classified image, those same pixels are going to be affected anyway).
		You need to have the values from the "larger" or primary image be the Y values and the other image be the X value (I'm told the correct statistical term is that the Y is the master and the X is the slave).
	www.faqs.org /faqs/sci/Satellite-Imagery-FAQ/part3 (6555 words)

	Telescopic Satellite Observations (Site not responding. Last check: 2007-10-31)
		This third image (of Mir taken in April 1991 with a 90 inch telescope) was produced by Dave Harvey at the Steward Observatory in Arizona, using the Comsoft commercial satellite tracking package on several reflecting telescopes.
		A similar image (shot from the SPAS pallet satellite during STS-7 in 1983, at a range of a few hundred meters) is alongside on the right.
		This image is a frame from a video sequence taken using a CCD camera and a 48 inch telescope at the USAF Phillips Lab Malabar Test Facility at Valkaria, Florida during STS-37.
	www.satobs.org /telescope.html (1020 words)

	EO Newsroom: New Images - Dwindling Arctic Sea Ice
		Researchers suspect the loss of Arctic sea ice may be caused by changing atmospheric pressure patterns over the Arctic that move sea ice around, and by warming Arctic temperatures that result from the buildup of greenhouse gases in the atmosphere.
		The image above shows a comparison of composites over the Arctic Circle, acquired in 1979 (top) and 2003 (bottom) by the DMSP Special Sensor Microwave Imager (SSMI).
		The first image shows the minimum sea ice concentration for the year 1979, and the second image shows the minimum sea ice concentration in 2003.
	earthobservatory.nasa.gov /Newsroom/NewImages/images.php3?img_id=16340 (180 words)

	RAMMB: Comprehensive
		Weaver, J.F., and J.J. Toth, 1990: The use of satellite imagery and surface pressure-gradient analysis modified for sloping terrain to analyze the mesoscale events preceding the severe hailstorms of 2 August 1986.
		Purdom, J.F.W., and J.F. Weaver, 1990: A satellite perspective of the June 15, 1988 tornado outbreak in Denver, Colorado.
		Zehr, R.M., 1988: Satellite diagnosis of tropical cyclones.
	rammb.cira.colostate.edu /resources/publications.asp (13838 words)

	China imagery page
		AVHRR image - July 12, 2002 - Closeup of the Yellow River - flooding is visible
		Landsat image Comparison - July 9, 2002 vs June 6, 2002 - Heavy rainfall in the upper Yellow River basin during June raised water levels above flood stage.
		Image clearly shows the difference between forest (in deep or bright red) and cropland (lighter tones).
	www.fas.usda.gov /remote/china/chimagery.html (1130 words)

	Satellites of the Outer Planets (Site not responding. Last check: 2007-10-31)
		The satellites of the giant outer planets are a surprisingly diverse group of bodies.
		Additional 3-D images of the satellites are available on the 3-D Tour of the Solar System.
		Neptune's largest satellite, Triton, is in a highly inclined retrograde orbit and is believed to have been captured by Neptune early in its history.
	www.lpi.usra.edu /resources/outerp/moons.html (510 words)

	Large Underwater Line Feature, Bahamas
		In the image above the line area almost appears to be part triangular as well.
		This may be a natural feature but it does appear anomalous in comparison with the surrounding areas.
		The strange feature in image C above circled in red has not been confirmed on aerial or satellite imagery and appears to be completely missing from Google Earth images.
	www.satellitediscoveries.com /discoveries/land_sea_coast_structures/line/line_1.html (201 words)

	[No title] (Site not responding. Last check: 2007-10-31)
		However, images of the Doppler-shifted Lyman-alpha emission show clear morphological differences between the diffuse proton aurora and the more structured electron precipitation.
		Parallel in-situ observations of the precipitated particles have been collected from low-altitude satellites during IMAGE apogee observations of the North polar region.
		These simultaneous measurements permit a comparison between the remotely imaged particle precipitation and the magnetic footprint measurements made along the low-altitude satellite track.
	image.gsfc.nasa.gov /publication/abstract/2001_gerard_etal.txt (248 words)

	Alleged Land Clearing by Arizona Land Developer Revealed with IKONOS Satellite Imagery (Site not responding. Last check: 2007-10-31)
		Before-and-after satellite images of the area captured by Space Imaging’s IKONOS satellite show certain changes to the environment and will be used as evidence in the case.
		The satellite images captured the alleged land clearing which included 700 acres over four miles from north to south.
		Space Imaging is the premier provider of satellite imagery enabling businesses, governments and individuals to better map, measure, monitor and manage the world in which we live.
	www.spaceimaging.com /newsroom/2005_marana.htm (773 words)

	Image Gallery - Directions Magazine
		Collected by the satellite’s High Resolution Geographic instrument and acquired in four bands at 10m resolution: green, red, near infra-red and short-wave infra-red.
		Image processing technique employed: A sharpening algorithm was applied to improve definition and clarity.
		The image was resampled to 5 metre pixels and a natural colour model was applied.
	www.directionsmag.com /image.gallery/?i=0&c=0&page=4 (694 words)

	IMAGE Project: Science Presentations
		Carpenter, D.L., New Perspectives on the Earth's Plasma Environment from the IMAGE Satellite, presented at the meeting of the Belgian Physical Society, May 16, 2001.
		G'erard, J-C., et al., Observation of the electron and proton aurora from the IMAGE satellite: comparison with in-situ particle precipitation, presented at the European Geophysical Society meeting, Nice, France, March 30, 2001.
		Reinisch, B. W., Recent Results of the Radio Plasma Imager on the IMAGE Satellite, presented at the COSPAR Colloquium on Solar-Terrestrial Activity and Space Environment, Beijing, China, Sept. 10-12, 2001.
	image.gsfc.nasa.gov /publication/index_abstracts_2001.html (908 words)

	Tutorial: Image interpretation quiz
		This interactive Image Interpretation Quiz is for students of remote sensing who would like to explore a variety of interpretation techniques and concepts.
		If your access is by phone line with a 56K modem you may expect loading times of one to several minutes for each question.
		An HTML version of the Image Interpretation Quiz is available for those who are not able to view a Shockwave file.
	www.ccrs.nrcan.gc.ca /resource/tutor/iquiz/index_e.php (94 words)

	Space Imaging :: Image Gallery (Site not responding. Last check: 2007-10-31)
		This one-meter resolution satellite image of the ski jumps at Pragelato.
		The image shows Large Hill, 120 meters in height and Normal Hill, 90 meters in height.
		GeoEye's IKONOS satellite took this one-meter resolution color image January 10, 2006.
	www.spaceimaging.com /gallery/default.htm (69 words)

	CIMSS GOES Gallery
		GOES-8 images from the October winter storm which affected the Rockies, central Plains and Great Lakes region.
		The 3.9 micron shortwave infrared channel is useful for detecting stratiform clouds over regions of snow cover, due to differences in reflectivity of water droplets and ice crystals at that wavelength.
		The dust plume is evident in visible imagery, especially with the low sun angle of early morning (magnified visible image).
	cimss.ssec.wisc.edu /goes/misc/interesting_images.html (3368 words)

	Satellite Dish TV Reviews about Dish Network and DirecTV
		In fact, if you do a search on a popular search engine for satellite dish, you'll get millions of results that have little or no helpful information about your new satellite TV system.
		When selecting a satellite programming plan, you need to make sure all the channels you want to watch are available.
		The last thing you want to do is sign up with a satellite programming plan that doesn't offer the channels you want to watch.
	www.satellite.shopspot.net (496 words)

	[No title]
		This satellite map taken on March 30 shows villages and settlements affected by flood waters (dark patch on the satellite image).
		European satellites have been activated to monitor the flood waters.
		For a comparison view these satellite images from previous years
	www.alertnet.org /thefacts/satelliteimages/NMfloods01Apr04.htm (197 words)

	Catalog Page for PIA06606
		As if drawn by an artist, this sublime scene speaks of the powerful beauty in the outer solar system: the domain of giant planets encircled by rings and orbited by small cratered moons of ice.
		The image was taken in visible blue light with the Cassini spacecraft wide-angle camera on Feb. 28, 2005, at a distance of approximately 2.6 million kilometers (1.6 million miles) from Saturn.
		The image scale is 154 kilometers (96 miles) per pixel.
	photojournal.jpl.nasa.gov /catalog/PIA06606 (238 words)

	Satellite Internet Services (Site not responding. Last check: 2007-10-31)
		Wireless Satellite Internet connections are perfect for business and residential users who want reliability and high speed internet access.
		Operate a fleet of satellites for the provision of broadcast distribution and telecommunications services.
		satellite internet provider, satellite internet, high speed satellite internet, wireless internet satellite, satellite internet service provider, internet satellite dish, satellite internet services...
	www.fadssatellite.com /satelliteinternetservices (585 words)

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