Table of Contents
Advertisement
Store - On-demand page (Press Store [<<] button for 2 seconds)
All sensor values are stored into internal memory. Uranus displays a confirmation
screen with the memory bank number that was used. In above example Uranus
has 42 used out of 500 available records in memory. Press any button to exit this
screen.
8 MEASUREMENT CONSIDERATIONS
8.1
SKY QUALITY
MPSAS is a logarithmic measurement scale which means that large changes in sky
brightness correspond to relatively small numerical changes. A difference of 5
magnitudes is a factor of 100 times the intensity.
Lots of factors can affect each light measurement. Let apart the light pollution for
obvious reasons. In different dark sites, you have to calculate that below reasons
affect each light measurement.
• Zodiac Light: A white glow that is visible in the night sky and appears to extend
from the Sun's direction and along the zodiac, straddling the ecliptic. Sunlight
scattered by interplanetary dust particles causes this phenomenon. Zodiacal
light is best seen in the Northern Hemisphere during twilight after sunset in
spring and before sunrise in autumn, and before sunrise in autumn and after
sunset in the Southern, when the zodiac is at a steep angle to the horizon.
However, the glow is so faint that moonlight or light pollution often outshines it,
rendering it visible only in dark skies. Zodiac Light will affect the light
measurement (increases brightness) to lower MPSAS values (in dark skies) if
you point towards this direction.
Uranus Meteo Sensor
Page 32 of 38
Pegasus Astro - Uranus Meteo Sensor Manual
Advertisement
Table of Contents
