NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Henning Umland's long term almanac. Is it wrong?
From: Gary LaPook
Date: 2016 Feb 23, 20:46 +0000
From: Bill Lionheart <NoReply_Lionheart@fer3.com>
To: garylapook@pacbell.net
Sent: Tuesday, February 23, 2016 12:08 PM
Subject: [NavList] Re: Henning Umland's long term almanac. Is it wrong?
From: Gary LaPook
Date: 2016 Feb 23, 20:46 +0000
Celestial Navigation Data for 2016 Feb 23 at 12:06:49 UT
For Assumed Position: Latitude N 40 00.0
Longitude W 60 00.0
Almanac Data | Altitude Corrections
Object GHA Dec Hc Zn | Refr SD PA Sum
o ' o ' o ' o | ' ' ' '
SUN 358 21.1 S 9 55.8 +14 19.8 116.5 | -3.9 16.2 0.1 12.5 FRom the USNO website.
gl
From: Bill Lionheart <NoReply_Lionheart@fer3.com>
To: garylapook@pacbell.net
Sent: Tuesday, February 23, 2016 12:08 PM
Subject: [NavList] Re: Henning Umland's long term almanac. Is it wrong?
Thanks Fred for your detailed reply, especially diagnosis of the javascript bug. I think now that I have worked out how to use Pyephem I might abandon Henning's javascript, partly as I feel more confident in using python. My boat computer runs Navigatrix, a special boat version of Linux, so it should be easy to get the python library working and write scripts I like myself. I think there is a CN plug in for OpenCPN and I have yet to try it.
On the other hand one thing I liked about the idea of javascript is the hope that it would run on any phone with a browser, so would be the modern version of using a programmable calculator. I suppose the logical next step is to see if pyephem runs ok with one of the Android versions of python.
Also I will now concentrate on getting the best out of my old Davis Mk 25 plastic sextant. It seems you get lots of practice at adjusting these as I seem to have to adjust all three mirror screws every time I use it.
Also I will now concentrate on getting the best out of my old Davis Mk 25 plastic sextant. It seems you get lots of practice at adjusting these as I seem to have to adjust all three mirror screws every time I use it.
[By the way sorry I double posted folks. The first one (before I tried python) gave me an error message so I thought it had not gone.]
Best wishes
Bill
