# US 7,467,043 B1 · Method for determining current synthetic ultraviolet index for a specified location

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- Number: US 7,467,043 B1
- Document ID: US7467043B1
- Status: Granted
- Kind: B1
- Application number: 11/432,649
- Filed: 2006-05-10
- Granted: 2008-12-16
- Earliest claimed: 2005-05-10
- Assignees: The Weather Channel, Inc.
- Inventors: Jeral Garcia Estupinan
- Web page: https://patentgrep.com/patent/US7467043B1

## CPC

- G01W 1/00: Meteorology
- G01J 1/02: Details
- G01J 1/0219: {Electrical interface; User interface}
- G01W: METEOROLOGY (radar, sonar, lidar or analogous systems, designed for meteorological use G01S13/95, G01S15/88, G01S17/95)
- G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N)

## Abstract

A current synthetic UV index is developed and successfully verified against direct surface measurements of UV index values. The purpose of this invention is to distribute this current synthetic UV index through cell phones nationwide. This will inform cell phone users for the first time about the current UV index value when they carry their cell phones. The current UV index will be calculated using the geographical location of the cell phone, the time of the day, and the cloud cover conditions in that area. The algorithm will then use this information to calculate the solar elevation needed to determine the amount of UV radiation reaching the earth's surface at any given time. The total column ozone for that particular day will be taken into account for each calculation. This mechanism of dissemination of the actual/current UV index values will be an important achievement with the intention of raising the public's awareness of the harmful effects of the sun's ultraviolet rays.

## Claims

### Claim 1

A method of determining a current synthetic ultraviolet (UV) index value for a given location, comprising:
receiving a request for said current synthetic UV index value for said given location, wherein said given location may not be equipped with UV instrumentation;
determining a closest cloud cover condition and a closest total column ozone available to said given location;
determining a clear sky UV radiation using a most recent closest total column ozone;
using said closest cloud cover condition to interpolate a cloud cover condition for said given location;
determining a cloud adjusted UV radiation using said interpolated cloud cover condition for said given location; and
converting said cloud adjusted UV radiation to UV index units.

### Claim 2 (depends on 1)

The method of claim 1, further comprising determining said clear sky radiation using a location, elevation, and total column ozone at a given time.

### Claim 3 (depends on 2)

The method of claim 2, said location comprising a geographical latitude and longitude.

### Claim 4 (depends on 1)

The method of claim 1, said adjusting said determining said cloud adjusted UV radiation further comprising using a percentage cloud cover to determine a cloud attenuation factor.

### Claim 5 (depends on 1)

The method of claim 1, further comprising multiplying said clear sky UV radiation by a cloud attenuation factor to obtain said cloud adjusted UV radiation.

### Claim 6 (depends on 1)

The method of claim 1, further comprising dividing said cloud adjusted UV radiation in milli-Watts m−2 by 25 to convert to said UV index units.

### Claim 7 (depends on 1)

The method of claim 1, further comprising providing said UV index to a user device located at said given location.

### Claim 8 (depends on 1)

The method of claim 1, interpolating said closest cloud cover condition further comprising:
determining nearest neighbors to said given location;
establishing a cloud cover information at each of said nearest neighbors in accordance with climatological data;
determining corrections to said closest cloud cover condition in accordance with said cloud cover information associated with said nearest neighbors; and
interpolating said corrections to said given location.

### Claim 9 (depends on 1)

The method of claim 1, further comprising:
interpolating said clear sky UV radiation to determine a clear sky UV radiation for said given location; and
adjusting said clear sky UV radiation for said given location using cloud cover condition for said given location.

### Claim 10 (depends on 1)

The method of claim 1, further comprising augmenting said closest current cloud cover condition using a satellite cloud cover data.

### Claim 11

A method of determining a current synthetic ultraviolet (UV) index value for a given location, comprising:
determining a closest cloud cover condition and a closest total column ozone available to said given location;
interpolating a cloud cover condition for said given location from said closest cloud cover condition;
interpolating a total column ozone for said given location from said closest total column ozone;
determining a clear sky UV radiation for said given location using said interpolated total column ozone for said given location;
determining a cloud adjusted UV radiation using said interpolated cloud cover condition for said given location; and
converting said cloud adjusted UV radiation to UV index units.

### Claim 12 (depends on 11)

The method of claim 11, further comprising forwarding said UV index units to a remote device.

### Claim 13 (depends on 11)

The method of claim 11, further comprising verifying said current synthetic UV index value using actual cloud cover reports from specific UV measuring sites.

### Claim 14 (depends on 11)

The method of claim 11, wherein said current synthetic UV index value for said given location correlates within an accuracy of about +/−0 UV index units of a direct surface measured UV index value.

### Claim 15 (depends on 11)

The method of claim 11, wherein said current synthetic UV index value for said given location correlates within an accuracy of about +/−1 UV index units of a direct surface measured UV index value.

### Claim 16 (depends on 11)

The method of claim 11, wherein said current synthetic UV index value for said given location correlates within an accuracy of about +/−2 UV index units of a direct surface measured UV index value.

### Claim 17

A system for providing a current synthetic UV index value for a specified location, said system comprising:
a first interface for receiving a request for said current synthetic UV index value for said specified location;
wherein said request comprises a geographical location of said specified location, and a date and a time of day of said request and wherein said specified location may not be equipped with UV instrumentation;
a database storing data comprising a closest cloud cover condition to said specified location, and a closest total column ozone available to said specified location;
a server having an algorithm for determining said current synthetic UV index value for said specified location using said geographical location of said specified location, said date and time of day of said request, said closest cloud cover condition to said specified location, said closest total column ozone available to said specified location, wherein said closest cloud cover condition to said specified location is interpolated to said specified location; and
a second interface for transmitting said current synthetic UV index value for said specified location.

### Claim 18 (depends on 17)

The system of claim 17, wherein said first and second interfaces further comprises one or more of: a wireless network interface, a land-based network interface, an Internet network interface, and/or a satellite network interface.

### Claim 19 (depends on 17)

The system of claim 17, wherein said data further comprises a latitude, a longitude, and an altitude for said geographical location.

### Claim 20 (depends on 17)

The system of claim 17, wherein said data relating to said closest cloud cover condition to said specified location is periodically updated using measurements to account for diurnal and weather system variations of said closest cloud cover condition to said specified location.

### Claim 21 (depends on 17)

The system of claim 17, wherein said current synthetic UV index value for said specified location is transmitted to a user device that generated said request for said current synthetic UV index value for said specified location.

### Claim 22 (depends on 17)

The system of claim 17, further comprising a notice regarding current synthetic UV index value for said specified location.

### Claim 23 (depends on 17)

The system of claim 17, further comprising a warning regarding potentially harmful effects of the sun's UV rays based on said current synthetic UV index value for said specified location.

### Claim 24 (depends on 17)

The system of claim 17, further comprising a recommendation regarding steps to be taken to protect against any harmful effects of the sun's UV rays based on said current synthetic UV index value for said specified location.

### Claim 25 (depends on 17)

The system of claim 17, where said first interface and said second interface comprise a single interface.