Sun Diagram Tutorial: Creating a Sun Diagram with Azimuth and Altitude Angles, Schemes and Mind Maps of Earth, Atmospheric, and Planetary Sciences

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Sun

Diagram

Tutorial

Arch

This

is^

sort

of

what

you

are

trying

to

create,

but

with

a^ bit

more

showing

in the

variation

of

the

section.

Suggest

using

colour

to

make

the

patterns

distinct.

This

student

also

seems

to

have

their

windows

all

going

to

the

floor

on

the

plan

view,

so

you

need

to

be

sure

to

include

the

shadow

from

the

portion

of

the

wall

below

the

window.

To^

find

the

coordinates

of

your

site,

go

to

Google

Maps

and

right

click

at the

building

location.

Click

on

“What’s

Here?”

This

will

bring

up

the

geo

coordinates.

This

is^

what

you

use

to

find

the

precise

solar

location.

Here

is^

the

latitude

and

is

the

longitude.

The

–ve in

front

of

the

means

it^ is^ west

of

Greenwich

where

they

establish

time

(in

England).

http://www.susdesign.com/sunposition/index.php

Step

On

SunPosition Fill

in the

sheet

but

we

will

be modifying

the

defaults

a^ bit

as

per

the

next

slide

Step

‐^

Find

your

latitude

‐^

Change

the

date

to

the

st^ so

you

are

matching

the

equinox

and

solstice

dates ‐^

Ask

for

monthly

(you

will

only

be

using

the

data

for

the

months

I^ requested)

‐^

Ask

for

hourly

(you

will

only

need

the

hours

I^ asked

for)

‐^

Calculate

Step

‐^

The

altitude

angle

is

the

angle

the

sun

makes

with

the

earth

‐^

The

azimuth

is^

the

deviation

from

due

south

in^

degrees

Solar

time

Altitude

Azimuth

In^ plan

what

we

are

trying

to

get

is^

a^ set

of

these

for

the

4 times

of^

year

and

multiple

times

of

day

to

see

the

path

and

penetration

of

the

sun.

You

can

input

your

latitude

and

window

and

room

sizes

to

see

what

this

looks

like

to

check

if

you

are

correct

in

what

you

are

plotting.

You

need

to

create

your

own

co‐

efficients as you

are

not likely

able

to

use

the

charts

I

supplied

in^

class

as^

they

are

only

for

north latitude.Use

basic

Trig

to

get

the

values.

tan

tan

The

previous section

diagram

for

the

geometry applies

ALONG

the

shadow

line.

So use

the

azimuth

angle

to

set

out

the

line

of

the

shadow,

and

its

length corresponds

to

the

line

you

found

in

the

previous section.