Sundial on Mars
Dear Diallists, I thought you might find this particularly interesting, sent to me by my USA-based son. http://mars.jpl.nasa.gov/msl/multimedia/interactives/learncuriosity/index-2.html then click on the arrow until you get to the description of the 'Back' Click on the sundial (near the top/middle) Also: http://www.pcworld.com/article/260579/mars_rover_curiosity_a_complete_guide_to_tagging_along_online.html In particular: https://twitter.com/marscuriosity https://twitter.com/sarcasticrover (unofficial I'm guessing :) David Brown Somerton, Somerset, UK --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Sundial on Mars
David, On http://wtvr.com/2012/08/03/nasa-mars-rover-curiosity-will-land-early-monday/ you can read that de 'sundial' is not used to have information to calculate time of day, date, and seasons but as an appliance to color balance the photgraphies Curiosity made. Willy Leenders Hasselt in Flanders (Belgium) Visit my website about the sundials in the province of Limburg (Flanders) with a section 'worth knowing about sundials' (mostly in Dutch): http://www.wijzerweb.be Op 10-aug-2012, om 11:03 heeft da...@davidbrownsundials.com het volgende geschreven: Dear Diallists, I thought you might find this particularly interesting, sent to me by my USA-based son. http://mars.jpl.nasa.gov/msl/multimedia/interactives/learncuriosity/index-2.html then click on the arrow until you get to the description of the 'Back' Click on the sundial (near the top/middle) Also: http://www.pcworld.com/article/260579/mars_rover_curiosity_a_complete_guide_to_tagging_along_online.html In particular: https://twitter.com/marscuriosity https://twitter.com/sarcasticrover (unofficial I'm guessing :) David Brown Somerton, Somerset, UK --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Sundial on Mars
Thanks, Willy. So it's more a question of when is a sundial not a sundial? Answer - when it's a colour comparator. David Willy Leenders David, On http://wtvr.com/2012/08/03/nasa-mars-rover-curiosity-will-land-early-monday/ you can read that de 'sundial' is not used to have information to calculate time of day, date, and seasons but as an appliance to color balance the photgraphies Curiosity made. Willy Leenders Hasselt in Flanders (Belgium) Visit my website about the sundials in the province of Limburg (Flanders) with a section 'worth knowing about sundials' (mostly in Dutch): http://www.wijzerweb.be Op 10-aug-2012, om 11:03 heeft da...@davidbrownsundials.com het volgende geschreven: Dear Diallists, I thought you might find this particularly interesting, sent to me by my USA-based son. http://mars.jpl.nasa.gov/msl/multimedia/interactives/learncuriosity/index-2.html then click on the arrow until you get to the description of the 'Back' Click on the sundial (near the top/middle) Also: http://www.pcworld.com/article/260579/mars_rover_curiosity_a_complete_guide_to_tagging_along_online.html In particular: https://twitter.com/marscuriosity https://twitter.com/sarcasticrover (unofficial I'm guessing :) David Brown Somerton, Somerset, UK --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Sundial on Mars
Color calibration was the primary function, however these sundials - which are also on the previous Mars rovers - were in fact designed to also be used to show time and season. Originally they were meant to be placed on stationary landers. Since rovers can change direction and latitude, making permanent lines a problem, the solution was to superimpose time indicator lines on the images digitally so the dial can be read, as in this photo from the Spirit rover: http://www.nasaimages.org/luna/servlet/s/fb8nc5 Here is an article (in PDF) from 2003 describing the design and operation of the Mars sundials: http://www.astro.washington.edu/users/woody/MarsDial.Plan_Rept.Jan04.pdf Don Rogerson David, On http://wtvr.com/2012/08/03/nasa-mars-rover-curiosity-will-land-early-monday/ you can read that de 'sundial' is not used to have information to calculate time of day, date, and seasons but as an appliance to color balance the photgraphies Curiosity made. Willy Leenders Hasselt in Flanders (Belgium) Visit my website about the sundials in the province of Limburg (Flanders) with a section 'worth knowing about sundials' (mostly in Dutch): http://www.wijzerweb.be Op 10-aug-2012, om 11:03 heeft da...@davidbrownsundials.com het volgende geschreven: Dear Diallists, I thought you might find this particularly interesting, sent to me by my USA-based son. http://mars.jpl.nasa.gov/msl/multimedia/interactives/learncuriosity/index-2.html then click on the arrow until you get to the description of the 'Back' Click on the sundial (near the top/middle) Also: http://www.pcworld.com/article/260579/mars_rover_curiosity_a_complete_guide_to_tagging_along_online.html In particular: https://twitter.com/marscuriosity https://twitter.com/sarcasticrover (unofficial I'm guessing :) David Brown Somerton, Somerset, UK --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Sundial on Mars
We have to define gnomon - as something perhaps common to all sundials. It is information reflected off the device. Must a gnomon cast a shadow? On 8/10/2012 7:41 AM, brick...@62bricks.com wrote: Color calibration was the primary function, however these sundials - which are also on the previous Mars rovers - were in fact designed to also be used to show time and season. Originally they were meant to be placed on stationary landers. Since rovers can change direction and latitude, making permanent lines a problem, the solution was to superimpose time indicator lines on the images digitally so the dial can be read, as in this photo from the Spirit rover: http://www.nasaimages.org/luna/servlet/s/fb8nc5 Here is an article (in PDF) from 2003 describing the design and operation of the Mars sundials: http://www.astro.washington.edu/users/woody/MarsDial.Plan_Rept.Jan04.pdf Don Rogerson David, On http://wtvr.com/2012/08/03/nasa-mars-rover-curiosity-will-land-early-monday/ you can read that de 'sundial' is not used to have information to calculate time of day, date, and seasons but as an appliance to color balance the photgraphies Curiosity made. Willy Leenders Hasselt in Flanders (Belgium) Visit my website about the sundials in the province of Limburg (Flanders) with a section 'worth knowing about sundials' (mostly in Dutch): http://www.wijzerweb.be Op 10-aug-2012, om 11:03 heeft da...@davidbrownsundials.com het volgende geschreven: Dear Diallists, I thought you might find this particularly interesting, sent to me by my USA-based son. http://mars.jpl.nasa.gov/msl/multimedia/interactives/learncuriosity/index-2.html then click on the arrow until you get to the description of the 'Back' Click on the sundial (near the top/middle) Also: http://www.pcworld.com/article/260579/mars_rover_curiosity_a_complete_guide_to_tagging_along_online.html In particular: https://twitter.com/marscuriosity https://twitter.com/sarcasticrover (unofficial I'm guessing :) David Brown Somerton, Somerset, UK --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Sundial on Mars
This is the Mars dial designed by Woody Sullivan at the University of Washington. He gave a short update on the design at the NASS Conference in Seattle last year. See http://www.sundials.org/attachments/article/174/2011%20NASS%20Conference%20Seattle.pdf for a retrospective on the conference but very little on the dial. Yes, the sundial is based on a colour comparator and the orientation of the dial changes when the rover moves. The hour lines lines are added by NASA back on Earth. The original design is described on Woody's website, more specifically in the following article. See http://www.astro.washington.edu/users/woody/MarsDial.Plan_Rept.Jan04.pdf . Regards, Roger Bailey -- From: da...@davidbrownsundials.com Sent: Friday, August 10, 2012 2:03 AM To: sund...@rrz.uni-koeln.de Subject: Sundial on Mars Dear Diallists, I thought you might find this particularly interesting, sent to me by my USA-based son. http://mars.jpl.nasa.gov/msl/multimedia/interactives/learncuriosity/index-2.html then click on the arrow until you get to the description of the 'Back' Click on the sundial (near the top/middle) Also: http://www.pcworld.com/article/260579/mars_rover_curiosity_a_complete_guide_to_tagging_along_online.html In particular: https://twitter.com/marscuriosity https://twitter.com/sarcasticrover (unofficial I'm guessing :) David Brown Somerton, Somerset, UK --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Sundial on Mars
Gnomon (γνώμων) is an ancient Greek word meaning indicator, one who discerns, or that which reveals. It has come to be used for a variety of purposes in mathematics and other fields. Best regards Kevin Karney On 10 Aug 2012, at 16:21, rPauli wrote: We have to define gnomon - as something perhaps common to all sundials. It is information reflected off the device. Must a gnomon cast a shadow? On 8/10/2012 7:41 AM, brick...@62bricks.com wrote: Color calibration was the primary function, however these sundials - which are also on the previous Mars rovers - were in fact designed to also be used to show time and season. Originally they were meant to be placed on stationary landers. Since rovers can change direction and latitude, making permanent lines a problem, the solution was to superimpose time indicator lines on the images digitally so the dial can be read, as in this photo from the Spirit rover: http://www.nasaimages.org/luna/servlet/s/fb8nc5 Here is an article (in PDF) from 2003 describing the design and operation of the Mars sundials: http://www.astro.washington.edu/users/woody/MarsDial.Plan_Rept.Jan04.pdf Don Rogerson David, On http://wtvr.com/2012/08/03/nasa-mars-rover-curiosity-will-land-early-monday/ you can read that de 'sundial' is not used to have information to calculate time of day, date, and seasons but as an appliance to color balance the photgraphies Curiosity made. Willy Leenders Hasselt in Flanders (Belgium) Visit my website about the sundials in the province of Limburg (Flanders) with a section 'worth knowing about sundials' (mostly in Dutch): http://www.wijzerweb.be Op 10-aug-2012, om 11:03 heeft da...@davidbrownsundials.com het volgende geschreven: Dear Diallists, I thought you might find this particularly interesting, sent to me by my USA-based son. http://mars.jpl.nasa.gov/msl/multimedia/interactives/learncuriosity/index-2.html then click on the arrow until you get to the description of the 'Back' Click on the sundial (near the top/middle) Also: http://www.pcworld.com/article/260579/mars_rover_curiosity_a_complete_guide_to_tagging_along_online.html In particular: https://twitter.com/marscuriosity https://twitter.com/sarcasticrover (unofficial I'm guessing :) David Brown Somerton, Somerset, UK --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Looking for Erich Pollähne
Can anyone help? I am trying to buy one of Erich Pollähne's perspex sundials. His company - Meku - has a website http://www.meku-pollaehne.de/Produkte/Sonnenuhren/sonnenuhren.htm and price list, but no response to my e-mail. Does he still trade? Thanks Kevin Karney --- https://lists.uni-koeln.de/mailman/listinfo/sundial
WG: Looking for Erich Pollähne
Dear Kevin Karney, Erich Pollähne is no longer alive. Perhaps you like to look a bit into the link: http://www.ta-dip.de/sonnenuhren/sonnenuhren-aus-nah-und-fern/niedersach sen/sonnenuhren-in-hannover.html Try your luck at: http://www.meku-pollaehne.de/Produkte/Sonnenuhren/sonnenuhren.htm MEKU Erich Pollähne GmbH Am Weingarten 14 30974 Wennigsen Tel.: +49 / (0)5103 / 8425 Fax: +49 / (0)5103 / 8537 E-mail: i...@meku-pollaehne.de Regards, Reinhold Kriegler * ** *** * ** *** Reinhold R. Kriegler Lat. 53° 6' 52,6 Nord; Long. 8° 53' 52,3 Ost; 48 m ü. N.N. GMT +1 (DST +2) www.ta-dip.de http://de.youtube.com/watch?v=XyCoJHwzzjUfmt=18 http://www.ta-dip.de/dies-und-das/r-e-i-n-h-o-l-d.html http://www.ta-dip.de/dies-und-das.html -Ursprüngliche Nachricht- Von: sundial [mailto:sundial-boun...@uni-koeln.de] Im Auftrag von Kevin Karney Gesendet: Freitag, 10. August 2012 19:14 An: Sonnenuhrliste Uni Köln Betreff: Looking for Erich Pollähne Can anyone help? I am trying to buy one of Erich Pollähne's perspex sundials. His company - Meku - has a website http://www.meku-pollaehne.de/Produkte/Sonnenuhren/sonnenuhren.htm and price list, but no response to my e-mail. Does he still trade? Thanks Kevin Karney --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
