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  1. andrewjsmith

    Surveying True Azimuths using British Geological Survey Magnetic Declination Calculator

    Yes - thanks again. One of the problems is that here in the UK we don't get that much sunshine ! http://files.engineering.com/getfile.aspx?folder=0d18f1b5-bf48-4516-af4d-a8c342596d90&file=image1.PNG
  2. andrewjsmith

    Surveying True Azimuths using British Geological Survey Magnetic Declination Calculator

    Thanks for the comment. I have received a reply from the BGS. It is not good news... "The accuracy that we assign to magnetic field model values is rather difficult to assess. This is because the observed field is made up of signals from a number of sources, primarily from flow of molten...
  3. andrewjsmith

    Surveying True Azimuths using British Geological Survey Magnetic Declination Calculator

    Hi Folk... I am interested in surveying azimuths with a precision and accuracy of about 1 minute of arc. I have been finding true north using a sunshot technique (theodolite, clock, nautical almanac) and have been getting good reproducible results which have been satisfactory. But the...
  4. andrewjsmith

    Zeiss Theo 010

    Hi Bruce - Yes - your reply is most welcome. It would be a great help if you could send your notes. Here is my email address : aj-smith@blueyonder.co.uk.
  5. andrewjsmith

    Zeiss Theo 010

    Thank you Dik. I am hoping that I shall be able to correct it, but am reluctant to meddle with the instrument until I have a clear understanding of what I should do. I am amazed by the precision of this theodolite. I have previously used a Theo 120 for archaeo-astronomical investigations, for...
  6. andrewjsmith

    Zeiss Theo 010

    Here is a pic of what I see when the horizontal scale is selectedhttp://files.engineering.com/getfile.aspx?folder=a4d472b6-e228-4e49-bd97-1ea3361a074a&file=010h.jpg
  7. andrewjsmith

    Zeiss Theo 010

    Hi - I have just received delivery of a Zeiss Theo 010 Secundentheodolit. The instrument is in good order, but there seems to be an error in the adjustment of the vertical circle micrometer. The attached pic shows what I see when the vertical scale is selected. Is there anyone who has any...
  8. andrewjsmith

    Corbelled arch

    Hi Folks - I am a professional electrical engineer, but as a student did a common 1st year with Civils, Mechanicals & Aeros, so feel that I should be understand some basic ideas in civ. eng. But this one has stumped me. I became interested in corbelling after crawling into the wonderfully...
  9. andrewjsmith

    kern arau k1a

    Just for the record, these questions are now answered. I consulted Nicolas de Hilster, who seems to be exceptionally knowledgeable about all matters thoedolitical: http://www.dehilster.info/index.php "... the threaded nipple is where power comes into the instrument. It requires a special...
  10. andrewjsmith

    kern arau k1a

    Thank you. If anyone is able to provide more specific info re any of these questions I would be most grateful.
  11. andrewjsmith

    kern arau k1a

    adjuster pichttp://files.engineering.com/getfile.aspx?folder=f3108f11-0399-4cd2-882e-42f1ccf293d0&file=locked_adjuster.jpg
  12. andrewjsmith

    kern arau k1a

    another...http://files.engineering.com/getfile.aspx?folder=8bbc3437-9266-4724-ac5b-96e0ea3d55a8&file=threaded_nipple.jpg
  13. andrewjsmith

    kern arau k1a

    cant delete this !
  14. andrewjsmith

    kern arau k1a

    Ok. Thank you for your reply. Here are my Queries. 1) When the bezel of the illumination window is rotated to a certain angle, what look like 2 sockets for electrical wander plugs are revealed. I am guessing that these relate to an alternative electrical illumination system. Is there an...
  15. andrewjsmith

    kern arau k1a

    Hi Guys. I have just bought a Kern K1A theodolite. There are features on it I don't understand. Does anyone out there know about these theodolites ?

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