Continuous Filter design for measure signals from Boost Converter out
This is just a first order low pass filter.  

A first order, low pass filter, has a transfer function of the form \$\frac{1}{\tau s + 1}\$  where \$\tau\$ is the filter time constant. in the analogue domain such a filter can be realized with a resistor and a capacitor resulting in \$\tau = RC\$

This person has created a 1st order low pass filter with a time constant of 1e-2 which creates a 1st order low pass filter with a cuttoff frequency at \$f_c = \frac{1}{2 \pi \tau} = 15.9Hz\$

Please NOTE: this is a continuous filter and not a digital filter. You can realise the digital equivalent via the difference equation of a 1st order filter:

\$y_i = \alpha x_i + (1+\alpha)y_{i-1}\$ 

where \$\alpha = \frac{\Delta_T}{\tau + \Delta_T}\$