Sunday

March 29, 2015

March 29, 2015

Posted by **Mike** on Monday, October 30, 2006 at 1:10pm.

I have read 2 explanations of the Equation of Time which seem to contradict each other.

Today the Equation of Time is 16 minutes 15 seconds.

I have seen it expressed as 16.15 F. The F means FAST meaning the sun is 16m 15s FAST.

Another explanation advised me to add the 16m 15s to GMT (UTC) before commencing my calculations which incidentally are to establish LONGITUDE using LAN.

Can anyone offer a clearer explanation please.

Mike.

Both are the same. You want for longitude the difference between UT and local time. Local time is determined by a clock, minus the EOT. That is, if the sun is running fast, subtract it from local time. Since you are determing the difference between Local time and UT, adding it to UT is the same.

Longitudetime=Localtime - UT

But if you are observing a sun event, such as meridian, you correct for EOT.

longitudetime= localtime - EOT -UT

or as above

longitudetime= localtime - (UT + EOT)

**Answer this Question**

**Related Questions**

The Equation of Time - The reason for this post is I think I understand it and ...

Physics - I studied the equation of time recently and understand the Earths ...

Physics - A basketball player, standing near the basket to grab a rebound, jumps...

Physics help - A wave is described by the equation y = (4.5×10−2) sin (1....

physics - How do you derive the equation for position vs. time from the velocity...

Physics - How do you derive the equation for position vs. time from the velocity...

Physics - Suppose you are given the following equation, where xf and xi ...

Algebra 2 - The number of pages p a student can read varies directly with ...

Math - HELP! I have a math question the says this: In track practice, Jesse ran ...

math-calculus - Hi i've been struggling over this question for a while. Can ...