Wednesday, July 1, 2020

It's getting better all the time

Next Swims:  
     Mon-Fri @ 6 am and 5 pm, 
     Saturday 8 am - Shipwreck swim at Atwater
     Saturday/Sunday Noon at Klode   
Last Swim:  Wednesday @ 5 pm
Water Temp:  72!
Air Temp:  84
Clarity:   Very clear but a tiny bit less than recently, 9/10
Waves: steady 10" - 12" swells
Kru:  Itch, Mr. Bubble, Mr. Anonymous, WeTaco, Janicka, Synchro, Brick, Liz, Super Hera

Three words....Seventy...Two...Degrees...
Any other words are superfluous

1 comment:

Moondaug said...

I maintain that Shipwreck is best viewed when the sun is at its zenith. The total amount of energy received at ground level from the Sun at the zenith depends on the distance to the Sun and thus on the time of year. It is about 3.3% higher than average in January and 3.3% lower in July. If the extraterrestrial solar radiation is 1367 watts per square meter (the value when the Earth–Sun distance is 1 astronomical unit), then the direct sunlight at Earth's surface when the Sun is at the zenith is about 1050 W/m2, but the total amount (direct and indirect from the atmosphere) hitting the ground is around 1120 W/m2.

Direct sunlight has a luminous efficacy of about 93 lumens per watt of radiant flux. Multiplying the figure of 1050 watts per square meter by 93 lumens per watt indicates that bright sunlight provides an illuminance of approximately 98 000 lux (lumens per square meter) on a perpendicular surface at sea level. The illumination of a horizontal surface will be considerably less than this if the Sun is not very high in the sky.