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Sorry for the non conforming data presentation vs formal  sight reduction
forms! I am fairly new at this computer stuff. Any questions my phone
no:626-833-1521 anytime and email:m_burkes@msn.com. Mike Burkes


>From: MIKE BURKES 
>Reply-To: Navigation Mailing List 
>To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM
>Subject: Reply to George Huxtable
>Date: Fri, 25 Jul 2003 17:57:02 -0700
>
>Hi folks and particularly to George who is anything but " particularly slow
>and/or stupid!!" I will answer his questions the best I can. A "pinwheel
>fix" refers to the ideal situation of the LOPS intersecting at one point
>taking the name from the toy i.e. a plastic star -shaped wheel pinned to
>rotate at end of stick by wind power. My "fix":34 24.8N, 119 01.5W vs
>www.Geocode.com:34 28' 25.36"N,118 40' 05.23"w. Bodies were Sun,Moon,Vega.
>Data: All dates and times G reenwhich,IC =0,Dip not applicable because of
>artificial horizon, HO 249 for sight reduction. Sun LL:2Hs=97d 48.3m, July
>04,2003, GMT 17-00-09, assumed L=34dN,aLong=118d 56.7W. Moon LL no.1:
>2Hs=59d 48.9, July 05, GMT 04-23-10, aL=34dN,aLong=118d 38.1W. Moon LL
>no.2:
>2Hs=92 d49.8m, July 07, GMT 03-27-54 aL=34dN.aLong=119d 21.3W. Vega: 2Hs:
>103d 40.1m,July 07, GMT 04-23-04,aL=34dN,aLong=119d00.0W. My resulting
>fix:34d 24.8N, 119d 01.5W. Sun is Lunar Dist. body. Data: Four obs: GMT
>20-53-15, 20-58-35, 21-02-40, 21-03-30, corresponding Ds: 61d 32.2m, 61
>34.3, 61 36.0, 61 36.3. AP for Hc"s: 34d 24.0N, 119d 02.0W. Sun Hc=74d
>36.5m,Moon Hc= 37d 30..5m. C.E.Fast 12m 25s,July 04, cleared dist"D" as per
>Stark book=61d 23.0m resulting in GMT error of 00m 07s.
>Reason for cocktail? Insufficient quanty of baby oil i.e. bath oil used to
>make up difference in tray! Reflections at certain points of tray were
>distorted.
>
>>From: George Huxtable 
>>Reply-To: Navigation Mailing List 
>>To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM
>>Subject: Trying to understand- was "urgent help needed"
>>Date: Fri, 25 Jul 2003 07:21:18 +0100
>>
>>Under the thread name "urgent help needed", (which seemed inappropriate,
>>so
>>I've changed it). Mike Burkes said-
>>
>> >Hi folks! An interesting observational situation occurred as follows:
>>Using
>> >Davis Artificial Horizon sites appeared ok i.e. graphing 2Hs vs. time on
>>all
>> >sites resulted in a near classic "pinwheel fix".However comparing "fix"
>>to
>> >map the results were off. Using my"fix" for Hc computations lunar
>>distance
>> >GMT differed by a mere few seconds indicating the flexibility of assumed
>> >position choice. I feel the reason for the discrepancy stems from the
>> >artificial horizon fluid being a combination of baby and bath oil
>> >introducing a constant error.I did notice several aberrations while
>>scanning
>> >the pool. Any feedback would be greatly appreciated! Thanks! Mike Burkes
>>
>>
>>I may be particularly slow, or stupid, but I understood very little about
>>Mike's observations. What's a "pinwheel fix"? When he says comparing "fix"
>>to map the results were off; how much off?
>>
>>He hasn't given us a single number to go on. What bodies was he observing
>>sights of? From where? When? What were the resulting altitudes? What was
>>the calculated position? What body was used with the Moon for lunar
>>distance? What was the resulting distance?
>>
>>Only if we get some details to get our teeth into can we hope to respond
>>to
>>Mike's request for feedback. That's as I see it, anyway: it may be clearer
>>to others, with sharper minds.
>>
>>I've never had much use for bath oil (or baby oil either, happy to
>>say...).
>>Do they mix? What was the intention behind this cocktail? If an oily
>>substance is being chosen for an artificial horizon, it seems sensible to
>>choose something really viscous or treacly, because wind won't ruffle its
>>surface noticeably. Does Mike's blend of oils meet that requirement?
>>
>>George Huxtable.
>>
>>================================================================
>>contact George Huxtable by email at george@huxtable.u-net.com, by phone at
>>01865 820222 (from outside UK, +44 1865 820222), or by mail at 1 Sandy
>>Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.
>>================================================================
>
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