Clarification on Path Solver Outputs and Power Calculations

[Chhartist]

I'm working with a path solver that has multiple transmitters (Tx) and receivers (Rx), and I want to confirm my understanding of the power calculations and terminology.

total_powers = np.sum(np.abs(a[i][0][j][0])**2)  # Total power in Watts
total_power_log = 10*np.log10(total_power)        # Total power in dBm

My Understanding:

1.total_power_log (dBm): Total received power in dBm (negative value) the same as PathLoss[dBm]: Lost power in dBm (also negative)
3.PathLoss[dB]: How much the signal got weaker (positive value)
4.RSS Calculation: RSS[dBm] = P_TX[dBm] + PathLoss[dB]

Questions for Clarification:

1.Is my interpretation of the power calculations correct?
2. Are the sign conventions for PathLoss[dBm] (negative) vs PathLoss[dB] (positive) accurate?
3. For calculating RSS, should I use PathLoss[dB] (positive) as shown above?
4. Are there any additional factors I should account for (antenna gains, system losses, etc.)?