# Calculation of metrics
## Cyberweather
The calculation of cyber weather (cybertoxicity in cyT) is performed as follows:
$$
cyT = 1 \* in + 10 \* out \text{, with }\begin{cases} \text{ } in \text{ the number of toxic flows IN} \ \text{ } out\text{ the number of toxic flows OUT}\end{cases}
$$
The weighting of an **OUT** toxic flow is much more important because it represents a network device that initiates a communication to a toxic IP address.
There are 5 different levels of cyberweather:
Cybertoxicity (cyT)
Icon
Equal to zero
Between 1 and 5 inclusive
Between 6 and 10 inclusive
Between 11 and 99 inclusive
100 and more
## Cybercarbon
The cyber carbon represents the **equivalent in CO2 emissions** (CO2e) of the **volume of the network flows**.
According to the ADEME (French Environment and Energy Management Agency) and a report posed in January 2022, the study shows that the environmental impact of data transmission on :
* a **fixed** network (about **18 gCO2e / Go**)
* a **mobile** network (estimated at 50 gCO2e / Go)
{% embed url="" %}
Source of the environmental impact of fixed and mobile networks
{% endembed %}
In the case of Serenicity, the majority of the devices are installed on **fixed networks**.\
Therefore, the calculation is as follows:
$$
cyC \text{ (in gCO2e) }= \frac{18 \* x}{10^9} \text{, with } x \text{ the sum of the flows in bytes}
$$
{% hint style="info" %}
The notation **gCO2e / kgCO2e** means **gram / kilogram CO2 equivalent**.
{% endhint %}
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