1 Estimate the speed of sound. 4 Twin Rotor Chinook Helicopter. A AT-502B Propeller Blade Passage Tone. 6 Ground Reflection Interference in Aircraft Sound. 1 The Doppler Shift of Satellite Radio Beacons. 2 Additional Passes with Improved Timing. 3 Passive Tracking of Satellites using only Range Data. 2 Seismic Phases and Arrival Times. 4 Earthquake Signal converted to Sound.

The world from my windows and the harmonies in my head. Saturday, September 05, 2009. At one point in my life, I kept up three blogs. I hope to see you there. Saturday, May 09, 2009.

Interesting stuff found while scanning the horizons of life. Posted by dpgill in Uncategorized. My folks took us to Gettysburg when I was about 10. Ken Burns helped re-ignite that interest. Samuel Pry Mill at Antietam Creek. Thoughts on the battle? The Sunken Road - looking west.

Thursday, April 7, 2011. It is always darkest before the dawn. We wanted to begin healing from the whole painful ordeal and knew that holding onto that hope was not going to help the process. So, needless to say, when the phone call came, I was shocked! You have already brought us more joy than we could have ever imagined! Tuesday, March 29, 2011.

Sunday, March 06, 2011. I hope to reconnect with old friends and maybe make some new ones. Friday, March 12, 2010. Dearest blog friends and family,.

My friend wrote a book recently for his children. He had things he wanted to be sure he told them, and decided to write a book, have it self-published, and give it to them. Of course, being an accomplished author, Kreeft could get someone to publish his. We went to a concert a few weeks ago at t.

These are a few of my favorite things. Sunday, April 25, 2010. As you can see, the ads are finally gone! I did a little bit of house cleaning on the comments as well. Thanks everyone for putting up with it all for the past year. There is always light around us, we just have to open our ey.