Summary of IBTrACS Parameters
The following summarizes the parameters available through IBTrACS. The listing follows the output from a ncdump -h IBTrACS_file.
| Variable | Units | Summary |
|---|---|---|
| genesis_basin | Basin where the track begins | |
| num_basins | Number of basins through which the storm passes | |
| season | Year (UTC) | Season. NH=01/01/YEAR to 12/31/YEAR SH=07/01/YEAR-1 to 06/30/YEAR |
| latitude | degrees_north | |
| longitude | degrees_east | |
| time(time) | days since 1858-11-17 00:00:00 (UTC) | Modified Julian Day |
| wind(time) | knots | Maximum Sustained Wind (MSW) gust (10-min) |
| pres(time) | mb | Minimum Central Pressure (MCP) |
| basin(time) | Basin of current location | |
| nature(time) | Cyclone Nature based on reports from source centers ET = extratropical TS = Tropical in nature SS = sub tropical storm MX = Conflicting reports from centers NR = Not Reported |
|
| pos_stdev(time) | km | Standard deviation of the various storm positions |
| pos_num(time) | Number of centers used to determine the position | |
| wind_quality | Quality assessment of the MSW 0 = OK 1 = Missing 2 = Questionable - Value 3 = Questionable - 6 hour change |
|
| wind_stdev | knots | Standard devition of MSW from the various centers |
| wind_condition(time) | Condition found in merging MSW | |
| wind_num(time) | Number of centers used in merging MSW | |
| wind_flag | Flag denoting centers used in merging MSW | |
| wind_maximum(time) | knots | Highest MSW reported |
| wind_minimum(time) | knots | Lowest MSW reported |
| wind_median(time) | knots | Median MSW reported |
| pres_quality(time) | Quality assessment of MCP 0 = OK 1 = Missing 2 = Questionable - Value 3 = Questionable - 6 hour change |
|
| pres_stdev(time) | mb | Standard deviation of MCP from various centers |
| pres_condition(time) | Condition found in merging MCP | |
| pres_flag(time) | Flag denoting centers used in merging MCP | |
| pres_num(time) | Number of centers used in merging MCP | |
| pres_maximum(time) | Highest reported MCP | |
| pres_minimum(time) | Lowest reported MCP | |
| isotime | YYYY-MM-DD HH:MM:SS | Time stored using ISO standard format |
