 |
 |
||||
|
Example One
| Step # 1 Mystery Class #1's sunrise time is given as 09:56 (GMT) on March 20. This means it was morning in Greenwich when the sun rose at this site. |
BOX A 9:56 A.M. (3/20) |
| Step # 2 Sunrise time at Greenwich was 6:02 A.M. |
BOX B 6:02 A.M. (3/20) |
| Step # 3 The number of hours and minutes between A and B is 3 hours and 54 minutes |
BOX C 3hrs 54 min |
| Step # 4 Convert the amount of time in Box C into minutes by multiplying the hours by 60 and adding the remaining minutes (3 x 60=180 + 54= 234 minutes) |
BOX D 234 minutes |
| Step # 5 Figure out the degrees away from Greenwich by dividing the minutes in Box D by 4 (234 divided by 4 = 58.50 degrees) |
BOX E 58.50 degrees |
| Step # 6 Eastern or Western Hemisphere? To determine the site's longitude you need to know if it is in the Eastern or Western Hemisphere (i.e East or West of Greenwich, which is 0 degrees). Here, 9:56 on 3/20 was later than 6:02 A.M. on 3/20. This means the site is west of Greenwich, in the Western Hemisphere. |
BOX F 58.50 W |
 |
 |
 |
 |
 |
 |
|
