Very interesting, can we find the GMT somewhere on the web, I for one will
bookmark that site.
Thanks in advance,
Bob

JDDGA wrote:

> Hi, I just want to add a couple of thoughts on The GMT question, if possible.
>
> GMT is the same all over the world and is based on the time at the Greenwich
> meridian. This is so that all over the world there is no confusion as to what
> the time is, for example if you are flying in a plane and have to meet another
> plane. Let's say that you are flying from California, the other guy/gal is
> traveling from China. If you are keeping track of GMT, you both will meet at
> the proper time, no matter where you meet in the world.
>
> What I think needs to explained a bit here is Local Mean Time. Local Mean
> Time is based on your actual distance, east or west, from the reference point
> (Greenwich). Since time zones are based on a line down the middle( as close as
> possible) of a time zone, your actual Local Mean Time will only match that
> time exactly if you are right on that line.
>
> Local Mean Time is based on your actual Longitude. Greenwich is 0 degrees
> (Zero). Although I live in the Eastern Standard Time Zone which is figured to
> be 5 hours later than in Greenwich, my Local Mean Time is not exactly 5 hours
> from Greenwich Mean Time.
>
> Since I live in the eastern area of the time zone my Local Mean Time will
> be less than if I lived in the middle or western part of the zone. Based on
> my Longitude, which is 73 degrees 45 Minutes West, my Local mean Time is 4
> hours 55 minutes earlier than Greenwich time. At Noon Greenwich Mean time, my
> Local mean Time will be 7:05 :00 .
>
> Oh yes, if you are in daylight savings time, you have to remember to not
> use your DST time. You need to rely on Greenwich Mean Time as the standard.
> The clocks may have have moved forward for the summer, but heaven didn't! :^)
>
> Gosh, I HOPE I got this right! Well, if I didn't, I'm sure someone will
> correct me.
>
> Clear skies,
>
> John
>

View index by [date] [author] [subject]
Previous message: Re: [M]: Observatory Climate, Chuck Faranda
Next message: Re: [M]: GMT Confusion, Peter Chang
Next message in thread: Re: [M]: GMT Confusion, Peter Chang
Previous message in thread: Re: [M]: GMT Confusion, Luis Fernando Pertuz