NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: On the integration of location and data
From: Frank Reed
Date: 2009 Nov 3, 22:25 -0800
From: Frank Reed
Date: 2009 Nov 3, 22:25 -0800
George H, you wrote: "And it was on the basis of those claims that some fanciful projections were made on Nav-list about what might become possible in terms of pointing-precision; claims which are now being repeated." WHAT claim has been repeated?? Quite a few times last spring I said to you that the whole "pointing precision" discussion was irrelevant to what I was discussing. It still is. There ALREADY EXISTS software for a couple of different mobile phone operating systems which allows you to aim your phone at a star (by "aim" is meant "hold the phone out at arm's length") and identify it. This isn't speculation. The software exists, and it works. It works well enough to be useful and not disappoint --it does the task it's advertised to do. I linked some videos demonstrating software like this in action on one type of phone last spring. Now, this software, as it stands, is general astronomy software, which is great and gets us half-way there. What I am suggesting is that we should try to create or support the creation of versions of this software that specifically highlight celestial navigation. For example, you could have software that calculates true and apparent altitudes and updates them in real-time when it's pointed at a bright navigational star or other celestial body. The altitude corrections could be displayed in a little table. The idea is that students of celestial navigation, just starting to think about the subject, could put something like this on their phones and start playing with it. They would very quickly learn the names of some of the brighter stars. They would develop an instinct for rates of change of altitudes and azimuths that has not traditionally been available in celestial navigation education. And they would also learn some terminology like refraction, horizontal parallax, azimuth, etc. which would might make the subject more intriguing, and certainly it would add familiarity. This is how you draw them in. This is one way to cultivate a new community of people interested in celestial navigation. There are at least a BILLION mobile phones in the world. There must be a hundred million that would qualify as "smartphone". Tens of millions have the necessary position-finding and orientation-finding components, and those numbers are rising dramatically. This is a huge opportunity. -FER PS: And I still swear on my stack of Bowditches :-) that when I first brought up this idea of astronomical identification software for cell phones I had no idea that it was already available on the very newest phone platforms. --~--~---------~--~----~------------~-------~--~----~ NavList message boards: www.fer3.com/arc Or post by email to: NavList@fer3.com To , email NavList+@fer3.com -~----------~----~----~----~------~----~------~--~---