Esri News Feed

Wednesday, November 07, 2012

Geo-Pic: Mapping a Hurricane from the "Outside In"

Found this post from NASA's Earth Observatory an interesting perspective to storm data.



 Quick "Cut & Paste" Description: 

".... one satelliteCloudsat—peered inside the storm and observed its vertical structure. It did so with acloud-profiling radar that sent pulses of energy toward Earth and recorded the strength of the signal that bounced off ice and water particles."

"....The bottom map shows the storm as observed by Cloudsat around 2 p.m. local time (18:00 Universal Time) on October 29, 2012. The image shows a cross-section—what the storm would look like if it had been sliced near the middle and viewed from the side. (Watch this animation to see how Cloudsat collects data).... "

 Image: Vertical "cut-away" of storm precipitation: 


" ... The top image, acquired the same day by the Moderate Resolution Imaging Spectroradiometer on the Aqua satellite, is shown for reference. The yellow line is the north-to-south track that CloudSat took over the storm.
In the Cloudsat data, the darkest blues represent areas where clouds and raindrops reflected the strongest signal back to the satellite radar. These areas had the heaviest precipitation and the largest water droplets. The blue line in the center of the image is the freezing line; ice particles formed above it, raindrops below..." 


Credits:
NASA Earth Observatory image by Jesse Allen, using CloudSat FirstLook data provided courtesy of the CloudSat team at Colorado State University. Caption by Adam Voiland.

Instrument: 
CloudSat - CPR

Thursday, November 01, 2012

Geo-Video: The Swiss Alps by Night

Brought to my attention by Holy Kaw! and Vimeo created by Alessandro Della Bella. The site link Helvetia's Dream includes a neat "play by play" of time-lapse points to look for during the fantastic night-time video journey.





A quick "cut & paste" summary:

Helvetia’s Dream’ takes you on a nighttime journey to some of the most beautiful spots in the Swiss Alps – from Arosa to Zermatt, including the world famous mountains Matterhorn and Eiger.
Please pay special attention to the following scenes:
@0:46 watch the persistent train of a bright meteor above Tijerflue Mountain in Arosa, December 2010, which was visible for about 20 minutes. A slow motion effect is applied for better visibility of the shooting star and its trail of ‘smoke’, which consists of ionized gas left behind as the meteor burns up in the atmosphere.
@1:14 clouds above Lake Geneva steam up the lens.
@1:36 on the very left: Climbers step into the unpredictable Eiger Nordwand.
@1:44 the Milky Way rises above the ‘Donkey’ rock on Pilatus.
@1:58 snowcats nearby cause the lighting of the summit cross on Fronalpstock Mountain. (Snowcat lights usually spoil time-lapse)
@2:21 the wind changes the reflection of Säntis Mountain in the Seealpsee.
@2:35 three settings showing orbits of stars. This is an alternative technique to display the movement of stars by sequentially adding the luminosity of each exposure. The result is basically a long exposure with a large aperture.
@2:49 the waxing new moon, not full moon, setting over Pilatus.
For the "making of" information and photo gallery check out the project website helvetiabynight.com.