![](https://twinspace.etwinning.net/files/collabspace/7/47/947/57947/images/be10a86d0_opt.jpg)
![](https://twinspace.etwinning.net/files/collabspace/7/47/947/57947/images/b7ad7330_opt.jpg)
![](https://twinspace.etwinning.net/files/collabspace/7/47/947/57947/images/bbcf0570_opt.jpg)
![](https://twinspace.etwinning.net/files/collabspace/7/47/947/57947/images/b7bb2f50_opt.jpg)
![](https://twinspace.etwinning.net/files/collabspace/7/47/947/57947/images/bab20710_opt.jpg)
![](https://twinspace.etwinning.net/files/collabspace/7/47/947/57947/images/babfc3b0_opt.jpg)
![](https://twinspace.etwinning.net/files/collabspace/7/47/947/57947/images/bf119c890_opt.jpg)
![](https://twinspace.etwinning.net/files/collabspace/7/47/947/57947/images/b8ca7110_opt.jpg)
![](https://twinspace.etwinning.net/files/collabspace/7/47/947/57947/images/bcd08a90_opt.jpg)
![](https://twinspace.etwinning.net/files/collabspace/7/47/947/57947/images/bddfcc50_opt.jpg)
![](https://twinspace.etwinning.net/files/collabspace/7/47/947/57947/images/b9a2c550_opt.jpg)
![](https://twinspace.etwinning.net/files/collabspace/7/47/947/57947/images/b69e3170_opt.jpg)
.
| Busteni | Pogana | Yamunanagar TEJLI |
![](https://twinspace.etwinning.net/files/collabspace/7/47/947/57947/images/c011ebf46.jpg)
![](https://twinspace.etwinning.net/files/collabspace/7/47/947/57947/images/bf10f7d86.jpg)
.
![](/files/collabspace/7/47/947/57947/images/bbd34e92.png)
![](/files/collabspace/7/47/947/57947/images/bce29052.png)
Here are the theorical values for 26 october
![](https://twinspace.etwinning.net/files/collabspace/7/47/947/57947/images/b9fdf5ce.jpg)
![](https://twinspace.etwinning.net/files/collabspace/7/47/947/57947/images/b8eeb00e.jpg)
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The error in the measurements of the shadows are less than 1cm:
Pogana: 55.9-55.3=+0.6cm (1.1%)
Busteni: 108-107=+1.0cm (0.9%)
Yamunanagar:25-25.8=-0.8cm (3.2%)
Pogana and Busteni are to close (100km) to expect a good result
The main causes of error are always
- error in the verticality of the gnomon
- error on the time of solar noon