| FIELD | WAS DEFINED AS | IS NOW DEFINED AS |
| First Transmit Time | 0016 | 0012 |
| Location | GREENWOOD CUTOFF STRUCTURE (UPSTREAM) | GREENWOOD CUTOFF STRUCTURE (UPSTREAM) |
| Sensor 1 Offset Time   | 16 | 12 |
| Sensor 2 Physical Element | PC | undefined |
| Sensor 2 Data Interval | 60 | undefined |
| Sensor 2 Offset Time   | 16 | undefined |
| Sensor 2 Base Elevation | 0.00 | undefined |
| Sensor 3 Physical Element | VB | undefined |
| Sensor 3 Data Interval | 60 | undefined |
| Sensor 3 Offset Time   | 16 | undefined |
| Sensor 3 Base Elevation | 0.00 | undefined |