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3.4 Orienting the Solar Array to Solar South
For full performance, your solar array must be oriented within 10° of true (solar) south. Depending on
your location, a compass reading may show an error of as much as 20°. To correct this discrepancy,
apply the magnetic declination for your region. Many regional maps indicate the magnetic declination. If
you don’t have a compass but can see your shadow and know the time of day, use this
Sun Compass
.
Sun Compass
™
For the USA (lower 48 states) and other 25° to 55° North latitude regions.
Find True South
quickly and accurately using only your shadow. No magnetic compass needed!
Sun Compass Instructions
1. Draw an arrow from Month dot to intersection of your Standard Time and Latitude.
(The gray line is an example: August, 2 PM at 40° N lat.)
2. Stand and face your shadow.
3. Hold this page horizontally.
4. Point the arrow that you drew to center of your shadow.
5. Sun Compass now indicates the four directions.
Sun Compass
™
is available for the following latitudes:
1. U.S.A. (25° to 55°) – shown here
3. Equatorial (20° N to 20° S)
2. Northern (50° N to 70° N)
4. Southern (10° S to 40° S)
To obtain reproduction rights, contact: John Veltman PO Box 23533, Santa Fe, NM 87502 USA
North
Aug
8 AM
9AM
10AM
11AM
1PM
2 PM
4PM
3PM
Jul
Jun
Apr
Mar
Jan
Feb
May
Oct
Nov
Dec
Sep
2 PM
3PM
4PM
10AM
9AM
8 AM
11AM
South
6AM
7AM
5PM
6PM
East
©
1996 by John Veltman
50 °
40 °
30 °
West
Содержание SunCentric P
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