1. Light Pollution Analysis of the Istrian Peninsula
ICPS 2003, Odense - Denmark
Light Pollution Analysis of the Istrian Peninsula
Ivica Crljenica, University of Zagreb

2. It is mainly produced by improper public lightning
Light Pollution is all the light that doesn’t illumiates what it should
It is mainly produced by improper public lightning

3. Light Pollution examples in the world…
Zagreb, 11:54 PM
Los Angeles, 00:26 AM
…and in our country

4. Light pollution in Europe in 1997…
…and the prevision for 2025.

5. Measurement setup Increased mobility
Larger analysis area – app 200 km2/night

6. Data Aquisition
CCD camera
- 250 s exposition
GPS device

7. Raw Data

8. Data Analysis
Image processing
Data interpolation

9. Analysied area
app 900km2

10. Comparison with last year’s results
2002.
2003.
Difference:

11. 3D view of all measurements
2002.
2003.
Difference:

12. Sky Glow decrement by radius
city boundary

13. Model of Sky Glow propagation
Propagation model:
I=I0/rq
r < 1km q=0.020± Rq=35%
r > 1km q=0.57± Rq=8.77%

14. Sky Glow – Population dependancy
Sky Glow distribution
Population distribution

15. Sky Glow Local Monitoring group website:
Ivica Crljenica, University of Zagreb