mopama.blogg.se - Download how much sunlight per day

UVB is the form of ultraviolet light that produces vitamin D in the skin. It is best to get your sun when the UV index is high, because you need to spend less time in the sun. A UV index of 14 means it's 14 at midday and around half that at 10 am and 2 pm.

Time of day - the UV index varies throughout the day, climbing to a peak at midday and then dropping.

UV Index - which is dependent on time of year.

Vitamin D dampens the inflammatory immune responses and protects brain cells. Depending on your definition of 'photoperiod' and 'day length', eclipses could be significant.The sun's UVB rays help the skin synthesize vitamin D, which is essential for human health, and especially for people with MS. I also checked times on March 20th, 2015 to see if they would show the shadow from the moon during the solar eclipse, but I didn't see it. The cloudless Earth map that is used is a processed version of a mosaic produced at NASA's Earth Observatory.

In constructing these images, the geometry of the Earth, Sun, and Moon is computed from the data in the Jet Propulsion Laboratory DE405/LE405 planetary and lunar ephemeris. Looking at their generated images and the following statement, I suspect that they don't compensate for geographic features, as they only mention plentary ephemeris: They also have a service that will generate an image of day/night demarcation for a given date-time. I don't believe that the US Naval Observatory takes that into account from their service, but they will calculate the sunrise & sunset times for a given lat/long down to the arc minute for a given year.

It's not as easily computed from SPICE kernels, as you have areas on mountains or in valleys that have different day lengths than their surrounding areas. The best proxy that I can recommend for what you're asking for are solar potential maps

high resolution stuff would be stored as binary data cubes or images). 'high spatial resolution' and 'csv' generally are mutually exclusive.