UV_new_dawki

EXPOSURE OF THE HUMAN BODY TO THE SUN WITH UV ULTRAVIOLET RADIATION

Measurements of UV radiation indexes and exposure doses using the main sensor No. U7 type LTR390

MEASUREMENTS OF UV INTENSITY INDEX, EXPOSURE TIMES Tnasw = f(UVI) and EXPOSURE DOSES calculated using the formulas:
				D1=((150M - 15)UVUV - 90UVUVUV)/(M-1)
D2= (UV power) x (measurement time)
where: Tnaśw(UV) = (300 - 270*(UV-1)) / (M-1)
Last measurement: 2024-11-23, 11:33				Current time
Current UV Index [UVI]				Current time Tnaśw. [min]	Around Midday Irradiation Doses D1 and D2
					Date: 2024-11-23
					time	Dose Value (UVindexo-minutes) [Im]
						Maximum hourly dose - 600 Im
						Doses D1		Doses D2
						value	total sums	value	total sums
0.00	Niski		2 and less	347	09-10	0	0	0	0
					10-11	0	0	0	0
			3 - 5		11-12	0	0	0	0
			6 - 7		12-13	0	0	0	0
			8 - 10		13-14	0	0	0	0
			11 and more, up to 16		14-15	0	0	0	0
					Total sums:	0	0	0	0
					Charts:	Doses D1 [Im]		Doses D2 [Im]

					All daily doses
M = MAX Index UV [UVI]				MAX exposure time [min]
M = 6.79, w dniu: 2024-07-13 13:00				30
Measurements and charts from the "Meteo Station" of the Faculty of Physics of the Warsaw University of Technology
Index UV

data is updated every 5 minutes
GENERAL DATA		AVERAGE UVI INTENSITY AND EXPOSURE TIME IN A GIVEN MEASURING PERIOD
Number of all measurements: 30727
Measurement period [year-month]	Number of intensity measurements UV	MEDIUM UV Index [UVI]		AVERAGE exposure time [min]	AVERAGE exposure doses D1 [Im]		AVERAGE exposure doses D2 [Im]
2024-04	168	0.93		303	9		5
2024-05	5542	0.58		320	4		3
2024-06	5649	0.48		324	3		2
2024-07	5632	1.32		285	17		7
2024-08	5052	1.46		278	20		7
2024-09	4209	1.45		279	20		7
2024-10	3902	1.30		286	18		6
2024-11	573	1.43		280	19		7

Table 1. Monthly averaged measurements of UV intensity [UVI] and exposure times [min]

GENERAL DATA		AGGREGATED MEASUREMENTS OF INTENSITY INDEX, EXPOSURE TIMES Tnasw=f(UV) [min.] AND EXPOSURE DOSE
Number of all measurements: 30727		M = MAX index [UVI]	MAX exposure time [min]	MAX exposure dose D1 [Im]	MAX exposure dose D2 [Im]
Number of all measurements: 30727		6.79	30	125	35
Measurement period [year]	Number of intensity measurements UV	AVERAGE UV INTENSITY, EXPOSURE TIME AND EXPOSURE DOSES IN A GIVEN MEASURING PERIOD
Measurement period [year]	Number of intensity measurements UV	AVERAGE index [UVI]	AVERAGE exposure time [min]	AVERAGE exposure doses D1 [Im]	AVERAGE exposure doses D2 [Im]
2024	30727	1.07	297	13	5

Table 2. Annual averaged measurements of UV intensity [UVI] and exposure times [min]

MEASUREMENTS OF UVI RADIATION INDEX and EXPOSURE TIME using a UV sensor
1. UV sensor. UV [UVI] measurements
2. UV sensor. UVAB [UVI] measurements
3. UV-UVAB sensor. UV [UVI] and UVAB [UVI] measurements

MEASUREMENTS OF UV RADIATION and SUNLIGHT (LUX), using the main sensor No. U7, type LTR390
1. UV and Sunlight Measurements
2. UVmax and Sunlight measurements
3. Meteorological measurements for the UV measurement station - collective
OTHER MEASUREMENTS
1. MEASUREMENTS OF UVI RADIATION INDEX and EXPOSURE TIME, using additional sensor No. U10, type LTR390
2. MEASUREMENTS OF UVI RADIATION INDEX and EXPOSURE TIME, on the northern side of the sky, using sensor No. U11, type LTR390
3. Collective UV and Sunlight measurements for sensors No.: U7, U10, U11
4. Environmental measurements for the measurement station in Strzybnica

Heliotherapy is a type of phototherapy, i.e. treatment with sunlight, already known to ancient civilizations, including: in Greece, Egypt and Rome, It involves light treatment through direct exposure to natural sunlight. They were commonly used in cases of skin inflammation, to nourish body tissues, as well as muscle pain and chronic respiratory catarrh.

Modern phototherapy has become popular, especially since the end of the 19th century. Skin diseases such as psoriasis, acne vulgaris, eczema and difficult-to-heal wound infections, such as those resulting from smallpox infection, were particularly eagerly treated with light. Light therapy was also commonly recommended for disorders of the circadian rhythm of sleep and wakefulness and for seasonal depression, i.e. seasonal affective disorder. Sunny weather has a healing, relaxing and antidepressant effect on the human body. In summer, the percentage of common viral and bacterial infections decreases because UV radiation penetrates the pathogens' envelopes and has a natural bactericidal effect.

Experts recommend exposing your body in the summer for an average of 5 to 30 minutes, at least twice a week. It is also worth remembering that the darker the skin and the weaker the sunlight, the more minutes of exposure time are needed. Read more about this topic here.

A very important effect of spending time in the sun is the stimulation of the production of vitamin D3, i.e. cholecalciferol. Vitamin D3 precursor compounds present in the epidermal layer are transformed as a result of the action of solar ultraviolet UV radiation, thanks to which a cyclic, active structure of this vitamin is created. It has been shown that small, but health-sufficient amounts of cholecalciferol can be produced even with moderate skin exposure, depending on the intensity of ultraviolet UV radiation.

According to scientists from British universities, only vitamin D3 stimulates the immune system, which we obtain mainly from animal foods (fatty fish, fish oils, liver, egg yolks, butter) and is produced in our skin under the influence of sunlight. As prof. says Colin Smith, lead author of the study, only vitamin D3 stimulates the interferon I signaling pathway in the body. It is a key part of the immune system that provides the first line of defense against bacteria and viruses. So proper levels of vitamin D3 can help prevent infections. Read more about this topic here.

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This website presents measurements of UV radiation intensity and corresponding exposure time for skin that has not been previously exposed to tanning. It is best to perform skin irradiation in the afternoon, i.e. from 11:00 a.m. to 1:00 p.m. The exposure time is calculated based on the formula:

Tnaśw = f(UV) = 300 - 270*(UV - 1) / (M - 1)

Where:

UV - current UV radiation intensity in [UVI] units during skin exposure,

M - maximum UV intensity [UVI], on the summer solstice, at sunny noon.

Solar ultraviolet UV radiation intensity measurements in the charts and tables on this website are given in units of [UVI]. UVI is a unit of measurement of UV radiation relating to its impact on human skin, causing skin erythema. The range of UVI Index values extends from zero and above. The higher the UVI value, the greater the probability of skin erythema and burns and the faster the time of their appearance. Read more about this topic here.

Downloads:
1. UV radiation units and exposure time
2. UV radiation theory
3. Amateur UV measuring device
4. UV radiation and human health
5. Gamma radiation theory and measurements