Final answer:
To read the height of the 500-mb pressure level on an upper-air station model, add a '0' to the right of the reported height, converting it into meters.
Step-by-step explanation:
When reading an upper-air station model map, the height at which the radiosonde detects 500-mb of pressure is reported in the upper right position. These heights are plotted in tens of meters, so to obtain the height in meters, you need to place a '0' to the right of the reported height. Therefore, if the height is listed as '558', you would read it as 5580 meters, because you've added a zero to the right.