Probably wrong again!!
How many times have you seen the METAR from the BOM equipment different to the ATIS? Temp, Wind, Cloud etc.... Just the other week the YMML ATIS said 11c etc, the METAR said 9c.
Its my understanding from many visits that the Tower controllers compile the ATIS info from their equipment and own observations from the Tower. Some equipment is possibly supplied by the BOM but the ATIS is made up by the actual controllers observation of the Wind, Temp Vis and Cloud cover.
They are licensed Met observers.
