How do I perform a worst-case RF exposure analysis for a multi-transmitter site?

Performing a worst-case RF exposure analysis for a multi-transmitter site evaluates the cumulative RF exposure from all transmitters at the site to verify that the total exposure does not exceed the applicable limits, even when all transmitters operate simultaneously at maximum power. The analysis: identify all transmitters (for each transmitter: document the frequency, transmit power (ERP or EIRP), antenna gain, antenna height, antenna tilt, beamwidth, and duty cycle), calculate the exposure from each transmitter at each evaluation point (use the appropriate propagation model: far-field (R > 2D^2/lambda): S_i = EIRP_i / (4pi × R_i^2); near-field (R < 2D^2/lambda): S_i = 16 × eta × P_i / (pi × D_i^2); account for antenna pattern (the exposure depends on the angle from the main beam; use the antenna's radiation pattern to determine the gain in the direction of the evaluation point)), sum the contributions using the multi-source summation formula (the FCC requires the summation of exposure ratios: sum_i (S_i / S_limit_i) less than or equal to 1, where S_limit_i is the applicable exposure limit at frequency f_i; this is necessary because the exposure limits are frequency-dependent (different limits at different frequencies), and contributions from different frequencies must be weighted by their respective limits), evaluate at all accessible locations (ground level around the site perimeter, on the tower at worker access points, on rooftop areas, and at the nearest residences or public areas), and document the results (create a site RF safety plan showing: the exclusion zone boundaries, the warning sign locations, and the access control procedures for the controlled areas).