Traffic Logix SafePace 700, Руководство по установке

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15 2014-2015 Copyright Traffic Logix® Corp. SafePace® 700 Variable Message Radar Speed Sign
Installation Manual V. 1.1
Solar noon is exactly half way between the sunrise and sunset time. Note that the difference between
local time noon and solar noon can be quite a bit, depending on your location in the time zone, and
daylight saving time.
You can also use this NOAA solar time calculator to find the local time for solar noon at your location:
http://www.srrb.noaa.gov/highlights/sunrise/sunrise.html
This Print Solar Noon Calendar prints out solar noon for your exact location for the entire year.
Compass Method
You can use a magnetic compass to find south. The compass reading must be corrected for the
magnetic declination in your area. Magnetic declination is the difference (in degrees) between the
direction the compass needle points and true north. Magnetic Declination depends on your
location. You can look up the declination for your area at the
National Geophysical Data Center website.
Some compasses allow the declination to be set. If yours does, then just set your local declination and
you are good to go. If not, then on each compass reading, you must offset the compass needle from the
true north mark on the compass by the declination angle.
For example, if you live in Bozeman, MT your declination is about 14 degrees east. To take a true
compass bearing, rotate the compass until the needle points 14 degrees east of north on the compass
bearing scale. If your declination were 14 degrees west, you would rotate the compass until the needle
was 14 degrees west of north on the bearing scale (it would point to 360 -14 = 346).
East
South
West
Solar
Noon