Plotting Selective Outage Probability vs Distance graph

Hi everyone. I am new to this forum and it is my first time posting a thread here. I need to plot a graph which plots the selective outage probability of a terrestrial point-to-point communication system against a range of distances. For example, from 0 - 1232m (1.232km)

I had got hold of some resources such as from this link: http://www.ofcom.org.uk/static/archive/ra/topics/fixedlnk/members/rsspwg/docs2002/08-05-02/pr0202-024-0.doc

For Appendix 5B on page 24, it shows an example of the application for the outage probability. I had tried using a for loop to loop the equations with an interval of 1m at 900MHz frequency. This is because i thought that the required parameters changes along with the increment in distance. The steps to completing the selective probability is as follows.

Step 1: Calculation of the mean time delay from:

tau_m = 0.7*(d/50)^1.3

Where d is the path length (km)

Step 2: Calculation of the multipath activity parameter eta from:

eta = 1 - exp^(0.2*po^0.75)

Where po = pw/100 is the multipath occurrence factor corresponding to the percentage of time pw (%) of exceeding A = 0 dB in the average worst month. The pw formula is given as follows:

pw = K*d^3*(1+|ep|^-1.2)*10^(0.033*f-0.001*hl)

Where f is the frequency (GHz), hl is the altitude of the lowest antenna , K is the geoclimatic factor (in UK a typical value is 8.241 10-5) , ep = (height of the transmitter – height of the receiver) / d : is the inclination angle in mrad (1 mrad = approx. 0.03 degrees)

Step 3: Calculation of the selective outage probability from:

Ps = 2.15*eta[(wm*10^-3*10^(-nm) + wnm*10^-3*10^(-ndm))]

Where: wm: signature width (GHz) nm: signature depth (dB) wnm: non-minimum phase width ndm: non-minimum phase depth tau: the reference delay (ns) used to obtained the signature

However, my graph plot end up looking like this.

This graph is certainly wrong according to the Appendix 5B example.

Could it be that i am supposed to use expectant operator function to work out the formulas or if there are some missing parameters which i may have overlooked?

Please do give me as much guidance as possible. I really do appreciate any help from anyone or whom is an expert in this. Thank you so much everyone.