Saturday, June 28, 2014

Assateague Island National Seashore Project- Graduate Student Blog Danielle Ferraro


June 18-28th:
A small conglomerate of folks from the University of Delaware, Washington College, United States Naval Academy, University of New Hampshire, and EdgeTech are combining forces for a 10-day mapping blitz of Assateague Island National Seashore (AINS). This National State Parks project will utilize sidescan and multibeam sonar to create a variety of bathymetric data products, along with other auxiliary data collected from AUV and ROV operations.
As a new graduate student in the CSHEL lab, part of my tasking is to configure our Real Time Kinematic (RTK) GPS system for use in this project. RTK GPS differs from other GPS systems in that it keeps position uncertainty down to only one or two centimeters, in contrast to errors of several meters as you might find with your iPhone or handheld GPS. RTK GPS relies on a fixed base station to provide corrections in real-time, which then sends those corrections to any number of rover units. A correction-broadcasting network can be used in place of a base station, as long as the survey area has a moderate cell signal.
We are launching two research vessels in operation for this project, the R/V Joanne Daiber (University of Delaware) and R/V Lookdown (Washington College), at the Curtis Merrit Harbor in Chincoteague, Virginia. This is the first field employment of the R/V Daiber since its recent acquisition by the University of Delaware. Its primary use will be for ROV and AUV operations, while the R/V Lookdown will focus its efforts on mapping. Before the R/V Lookdown began mapping, we set up the RTK GPS base station close to their slip at the harbor and took a few data points next to their boat with a rover. The crew aboard the Lookdown cross-referenced the elevations we provided from the GPS with their boat's positioning system, and were able to match it within a few millimeters.

The RTK GPS has several implications for this project and for future endeavors. One of our goals is to eventually configure the RTK GPS with an external radio modem to push its corrections to the AUV, allowing for more precise measurement. In the meantime, we are processing sonar data from the first few days as we wait for the sea state to lay down enough for us to get back out on the boat. Our ultimate project objective is to map the entirety of AINS and compare it to previously collected NOAA data to isolate effects from Hurricane Sandy. This information may be integral in understanding how to better manage coastlines as well as prepare and protect from future storm events.
-Danielle Ferraro







Thursday, June 6, 2013

Deep-Sea Dump: ROVs Expose Trashed Ocean Floor

Deep-Sea Dump: ROVs Expose Trashed Ocean Floor
Wired News

Instead of washing ashore, much of what we throw in the ocean stays there, slowly sinking to the bottom. Now, scientists at the Monterey Bay Aquarium Research Institute have compiled a report of deep-sea debris items, extending to depths of almost 12,000 feet.

Original Article: http://feeds.wired.com/~r/wired/index/~3/XDzUoZn04As/


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Wednesday, June 5, 2013

“Sailing Alone Around the World” in Google Earth

Yammer schooner!!

"Sailing Alone Around the World" in Google Earth
Google Earth Blog

Colin Hazelhurst, who has built impressive tours such as Captain James Cook's exploration of Australia, is back with an amazing collection of tours that show the voyage of Captain Joshua Slocum in his book "Sailing Alone Around the World".

slocum

Captain Joshua Slocum is credited with making the first single-handed voyage around the world, departing from Boston in April, 1895 and arriving in Newport in June, 1898 after a journey of some forty-six thousand miles The animations presented on Colin's site are organized by the chapters of Slocum's book and within that into the significant passages that made up his voyage.

In addition to the impressive collection of narrated Google Earth tours that you can find on his website, Colin is also converting all of them into YouTube videos for easy viewing.  As an example, here is Chapter III Part 3: "At Fayal in the Azores":

For more about this great collection of tours, you can follow Colin on Google+ or visit hazelhurst.com/Slocum to see all of the tours.

Great work Colin!

The post "Sailing Alone Around the World" in Google Earth appeared first on Google Earth Blog.



Original Article: http://feedproxy.google.com/~r/GoogleEarthBlog/~3/cz3t-oh0z6k/sailing-alone-around-the-world-in-google-earth.html


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Monday, May 27, 2013

Chile issues volcano evacuation order

Chile issues volcano evacuation order
BBC News

The authorities in Chile order the evacuation of 2,240 people living near the Copahue volcano because of 'increased seismic activity'

Original Article: http://www.bbc.co.uk/news/world-latin-america-22684322#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa


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