-- assuming your mobile computer previous coordinates were 99 120 100
local previous_X, previous_Y, previous_Z = 99, 120, 100
-- assuming your mobile computer current coordinates are 111 112 113
local list_of_satellites = {
   {x=22, y=55, z=77, distance=((111-22)^2+(112-55)^2+(113-77)^2)^0.5},  -- correct satellite
   {x=35, y=99, z=42, distance=((111-35)^2+(112-99)^2+(113-42)^2)^0.5},  -- correct satellite
   {x=44, y=44, z=44, distance=((111-94)^2+(112-94)^2+(113-94)^2)^0.5},  -- incorrect satellite
   {x=10, y=88, z=70, distance=((111-10)^2+(112-88)^2+(113-70)^2)^0.5},  -- correct satellite
   {x=54, y=54, z=54, distance=((111-64)^2+(112-64)^2+(113-64)^2)^0.5},  -- incorrect satellite
   {x=91, y=33, z=15, distance=((111-91)^2+(112-33)^2+(113-15)^2)^0.5},  -- correct satellite
}

local X, Y, Z, list_of_incorrect_sat_indices = trilateration(list_of_satellites, previous_X, previous_Y, previous_Z)
if X then
   print(X, Y, Z)
   if #list_of_incorrect_sat_indices > 0 then
      print("Satellites at the following indices are incorrect: "..table.concat(list_of_incorrect_sat_indices, ","))
   end
else
   print"Not enough satellites"
end