Comments for TTRAZ Weblog http://ttraz.wordpress.com Postings regarding the Tucson Trail Run series and related topics. The photo was taken at Palisades trailhead during the Mt. Bigelow run... Tue, 22 Apr 2008 04:52:41 +0000 http://wordpress.com/ hourly 1 Comment on Patagonia-Canelo Ride by jltheobald http://ttraz.wordpress.com/2008/04/21/patagonia-canelo-ride/#comment-56 jltheobald Tue, 22 Apr 2008 04:52:41 +0000 http://ttraz.wordpress.com/?p=177#comment-56 I notice not many pictures when you're on your bike. That's too bad. That's pretty country. I need to get back there with a camera. How much of the Arizona Trail is bikeable? I notice not many pictures when you’re on your bike. That’s too bad. That’s pretty country. I need to get back there with a camera. How much of the Arizona Trail is bikeable?

]]> Comment on GPS Accuracy–Where’s Your GPS Been? by jltheobald http://ttraz.wordpress.com/gps-measuring-and-mapping/gps-accuracy-wheres-your-gps-been/#comment-54 jltheobald Thu, 17 Apr 2008 14:13:34 +0000 http://ttraz.wordpress.com/?page_id=174#comment-54 I will add one point here. First, it's not clear that the distribution would be Gaussian (I don't like the word "normal" since I don't think much of the world actually fits that distribution) since you're dealing with bit toggle amongst other processes. I think it might be closer to a mixture of binomial (classic drunken sailor, random walk distribution) and uniform. Well, two points. Second, remember that GPS is a precision position measuring system not a distance measuring system. Third (weak humor). If I remember correctly, you have some trees in your back yard or at least nearby. You might want to try the experiment by placing the unit in the middle of a football field. I would recommend during the night to avoid temperature driven propagation issues. Also, the specific distribution of the satellites will matter and the history of recent correction table updates. I will add one point here. First, it’s not clear that the distribution would be Gaussian (I don’t like the word “normal” since I don’t think much of the world actually fits that distribution) since you’re dealing with bit toggle amongst other processes. I think it might be closer to a mixture of binomial (classic drunken sailor, random walk distribution) and uniform.
Well, two points.
Second, remember that GPS is a precision position measuring system not a distance measuring system.
Third (weak humor).
If I remember correctly, you have some trees in your back yard or at least nearby. You might want to try the experiment by placing the unit in the middle of a football field. I would recommend during the night to avoid temperature driven propagation issues. Also, the specific distribution of the satellites will matter and the history of recent correction table updates.

]]> Comment on Snow Day on Tanque Verde Ridge by rosszlf http://ttraz.wordpress.com/2008/02/19/tanque-verde-ridge-a-peaceful-day-in-the-snow/#comment-47 rosszlf Sat, 23 Feb 2008 01:24:24 +0000 http://ttraz.wordpress.com/?p=64#comment-47 Joe, I remember running along a creek in snow in D.C. 8 years ago and encountering a big hawk. The Mall in snow would be pretty nifty. Consider Mica... Ross Z Joe,

I remember running along a creek in snow in D.C. 8 years ago and encountering a big hawk. The Mall in snow would be pretty nifty.

Consider Mica…

Ross Z

]]> Comment on Snow Day on Tanque Verde Ridge by jltheobald http://ttraz.wordpress.com/2008/02/19/tanque-verde-ridge-a-peaceful-day-in-the-snow/#comment-46 jltheobald Thu, 21 Feb 2008 14:42:39 +0000 http://ttraz.wordpress.com/?p=64#comment-46 Ross, I read this after doing a 12 mile run here in DC on the Mount Vernon Trail along the Potomac and then on the Mall past the Smithsonian. It was evening and snowing with about 2 inches on the ground (paths were clear although damp). While considerably noisier here with the traffic as compared to on Tanque Verde Ridge, It was extremely enjoyable to be out with the monuments shrouded in mist and snow. I could feel there is something special about running in snow whether airborne or on the ground. I wish I could have been there with you. Thanks, jlt Ross,
I read this after doing a 12 mile run here in DC on the Mount Vernon Trail along the Potomac and then on the Mall past the Smithsonian. It was evening and snowing with about 2 inches on the ground (paths were clear although damp). While considerably noisier here with the traffic as compared to on Tanque Verde Ridge, It was extremely enjoyable to be out with the monuments shrouded in mist and snow. I could feel there is something special about running in snow whether airborne or on the ground. I wish I could have been there with you.
Thanks,
jlt

]]> Comment on Passing of a Giant by jltheobald http://ttraz.wordpress.com/2007/10/22/passing-of-a-giant/#comment-4 jltheobald Tue, 23 Oct 2007 19:05:13 +0000 http://ttraz.wordpress.com/2007/10/22/passing-of-a-giant/#comment-4 Calling it a weed based on expected life is a strong statement. You must not have much use for annual flowers. Check it out Thursday night? Calling it a weed based on expected life is a strong statement. You must not have much use for annual flowers. Check it out Thursday night?

]]> Comment on Passing of a Giant by rosszlf http://ttraz.wordpress.com/2007/10/22/passing-of-a-giant/#comment-3 rosszlf Tue, 23 Oct 2007 09:14:23 +0000 http://ttraz.wordpress.com/2007/10/22/passing-of-a-giant/#comment-3 Interesting, Joe. I'm going to go look for this giant weed :). (In the world of plants, cacti are actually pretty short-lived, even the saguaros. Creosote bushes can last thousands of years. Even grasses can make it for centuries.). Thanks, Ross Z Interesting, Joe. I’m going to go look for this giant weed :) . (In the world of plants, cacti are actually pretty short-lived, even the saguaros. Creosote bushes can last thousands of years. Even grasses can make it for centuries.).

Thanks,

Ross Z

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