Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Re: Consistent "away" intercepts. Why?
    From: Tony Oz
    Date: 2019 May 2, 02:04 -0700

    Hello and thank you for comments and suggestions.

    The wind here is a lightest form of a breese, almost no wind, so the air temperature vs height is definately with some significant gradient. The water surface in the eastern part of the Finnish Gulf is almost smooth - no waves at all.

    Because of the form of the shoreline I can't take sights before ~13:00 local time - no natural horizon there and I was unsuccessful with an artificial horizon (so far).

    The sight tube I'm using (the "night" one, 3x of СНО-М) is properly focused. I do try to make sure the sextant is made vertical (by watching the Sun's arcs). I've checked the shades to NOT affect the IE (I removed my DIY polariser shade and re-installed the original glass).

    For the SR I use my TI-83 with a set of formulas (a long-term almanac, St.Hilaire method), so it also should be considered as a possible source for errors...

    I take a sight, notice the UT, enter it to the TI-83 ethemerides, apply all the HS corrections and proceed to St.Hilaire against my GPS position. An iOS version of the AntiSpoof would help greatly! :)

    Regards,
    Tony

    60°8'54''N 29°55'5''E

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.
    Email:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site