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Updated ASAR Image Mode Medium Resolution Mosaic of Italy

41.8N 12.4E

August 25th, 2009 Category: Mosaics

ASAR Image Mode Medium Resolution Mosaic of Italy

ASAR IMM Mosaic of Italy (Draft Version)

ASAR Image Mode Medium Resolution Mosaic of Italy

ASAR IMM Mosaic of Italy (Final Version)

This image of Italy is an ASAR Image Mode Medium Resolution Mosaic created with products acquired between January and July 2009.

These source images were generated starting from ENVISAT/Asar products, using the Chelys Satellite Rapid Response System.

They were then projected, orthorectified (with a NASA Digital Elevation Model of 3 arcseconds of resolution) and merged in this mosaic by Chelys MOSRI, a real time mosaic generation system, at the original resolution of 75 meters (0.000833 degrees per pixel).

The entire mosaic was generated in less than 1 minute. This is the latest version of the ASAR processing algorithm used by MOSRI which eliminates the banding effect created by merging the various original images.

Orthorectified ASAR Mosaic of Italy – July 17th, 2009

41.8N 12.4E

July 17th, 2009 Category: Image of the day, Mosaics

Mosaic of Italy - June/July 2009

Mosaic of Italy - June/July 2009

This is a mosaic of Italy generated in real time using orthorectified ASAR images just a few seconds after product reception.

The mosaic is visualized using Google Earth and can be navigated using the features of that program; the image shown here is a screenshot of the GE interface.

The images here were captured over the last three weeks, in late June and early to mid-July. As more images are acquired over the next two weeks, the black spaces will be filled in.

ASAR Image Orthorectification

April 3rd, 2009 Category: Earth Observation

Figure 1 - 3D Model

Figure 1 - 3D Model

These images of Reunion Island provide a clear example of the improvements made through the use of the orthorectification technique.
The original product has been processed, orthorectified and projected using the Chelys SRRS (Satellite Rapid Response System). The orthorectification process is now fully automatic and transparent. The Digital Elevation Model used is the Nasa SRTM v4 (Shuttle Radar Topography Mission).

The proper DEM is selected according to the image resolution: from 15 arcseconds up to 1 arcsecond (only available for USA). The performance of the system are kept in real-time. The entire correction process takes less than 20 seconds per product.

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Manasarovar and Rakshastal Lakes, Tibet

February 22nd, 2009 Category: Lakes

Lake in Tibet - February 19th, 2009

Lake in Tibet - February 19th, 2009

Lake Manasarovar is a fresh-water lake in Tibet Autonomous Region of China, located 2,000 kilometres (1,200 mi) from Lhasa. To the west of Lake Manasarovar is Lake Rakshastal and towards the north is Mount Kailash.

Manasarovar Lake lies at 4,556 m (14947.5 ft) above mean sea level. It is one of the highest fresh-water lakes in the world.

Lake Manasarovar is relatively round in shape. The circumference of Manasarovar is 88 kilometres (55 mi), depth is 90 m (300 ft) and it occupies a total area of 320 square kilometres (120 sq mi).

The lake freezes in winter and melts only in the spring. Here, ice can be seen covering its surface, particularly over the northern section.

It is connected to Lake Rakshastal by the natural Ganga Chhu channel.

Lake Rakshastal, officially La’nga Co, lies close to Lake Manasarovar and Mount Kailash. The Satluj River originates at Rakshastal’s northwestern tip.

Its salty water, a stark contrast to the fresh water of Lake Manasarovar, produces no waterweeds or fish and is considered poisonous by locals.

Bays and Islands of Western End of Lake Balkhash, Kazakhstan

45.5N 73.7E

August 15th, 2012 Category: Lakes, Rivers

Kazakhstan – August 14th, 2012

While the southwestern shores of Lake Balkhash show large, green areas of vegetation, the northwestern shores show significantly less. Interesting features of the northern shoreline include Saryshagan Bay (diagonally northwest across from the Ili River on the southern side) and nearby Tasaral Island. Visible at the southernmost tip of the western end is Shempek Bay, near the islands of Basaran and Ortaaral. Although this image focuses on the western half of Lake Balkhash, the entire body of water can be observed upon opening the full image.