This analysis was updated on 08-Oct-2010
The following table records operator decisions [guesses] affecting the pressure correction treatment for each float, based on the tech file surface pressure offset parameter name.
| Parameter Name | P=Praw-SP | SP Adjust (dbar) | Truncating | x: P=Praw(N)-SP(N+x) |
|---|---|---|---|---|
| Old format tech files | ||||
| Other | no | ? | ? | ? |
| surface_pressure | no | ? | ? | ? |
| surface_offset | no | ? | ? | ? |
| pressure_sensor_offset | no | ? | ? | ? |
| start_surface_pressure | no | ? | ? | ? |
| pressure_offset_(counts) | no | ? | ? | ? |
| pressure_offset_(dbar) | no | ? | ? | ? |
| New format tech files | ||||
| Missing | ? | ? | ? | ? |
| pres_surfaceoffsettruncatedplus5dbar_dbar | yes | 5 | yes | 1 |
| pres_surfaceoffsetnottruncated_dbar | yes | 0 | no | 1 |
| pres_surfacebeforeresetpreviouscycle_dbar | no | 0 | no | 0 |
| pres_surfaceoffsetafterreset_dbar | no | 0 | no | 0 |
| pres_offsetadjustment_dbar | yes | 0 | no | 0 |
| pres_surfaceoffsetbeforereset_dbar | ? | ? | ? | ? |
| pres_surfacecomplement_dbar | ? | ? | ? | ? |
| pres_surfaceoffsettruncatedplus3dbar_dbar | yes | 3 | yes | 1 |
| pres_surfaceoffsettruncatedplus51.2dbar_dbar | yes | 51.2 | yes | 1 |
| pres_surfaceoffsettruncatedplus10dbar_dbar | yes | 10 | yes | 1 |
The table describes, for each of the pressure parameter descriptions above, how Pressure should be corrected for a float
P=Praw-SP: should pressure be adjusted by subtracting SP?
SP Adjust (dbar): eg 5 (dbar) for many Apex floats
Truncating: a type which truncated SP
x: P=Praw(N)-SP(N+x): eg 1 if an SP value corresponds to the preceding profile