Using the Free space equation, you can easily derive the power received by the Victim link receiver dRSS:
dRSS = Pe + Ge + Gr - L (Eq. 17)
dRSS = 30 + 9 + 9 - (32.5 + 10 log(8) + 20 log(1000))
dRSS = -53.5 dBm
Keep this calculation in mind, as we will compare it with what SEAMCAT calculates in the following sections