Basic Information

 Radiosonde type:Meisei iMS-100  Processor:Meisei MGPS2 (software: ver. 3.1.0)  Original data archive:ASCII files are archived every 1 second.

Processing Level

 Level-0Original  Level-1Same as original except for their format  Level-2Only apparent erroneous data have been removed.  Level-3AddJitional corrections have been made. Those information are provided in the header.  Level-4Same as Level-3 except for their format (5 hPa interval from 1000 hPa to 80 hPa in addJition to the surface value, etc.).

Data Format

Level-2/3

Header

 Line-01Project ID  Line-02Launch site/ID  Line-03Location in deg-E, deg-N, height in meter  Line-04Actual launch time in UTC  Line-05Nominal launch time in UTC  Line-06Serial Number / Radiosonde Type  Line-07Ground station software  Line-08-11Remarks

Data

 Following parameters are archived every 1 second as (f7.1, 2f8.2, 2x, 7f7.1, f8.0)

 Time in second  Longitude in degree East  Latitude in degree North  Pressure in hPa  Temperature in degree C  Dewpoint temperature in degree C  Relative Humidity with respect to water in %  Zonal wind component in m/sec  Meridional wind component in m/sec  Mixing ratio in g/kg  Height in meters

Level-4

Data

 Following parameters are stored every 5hPa from 1000hPa to 80hPa in addition to the surface as (2f8.2, 2x, 11f7.1, f8.0)

 Longitude in degree East  Latitude in degree North  Pressure in hPa  Temperature in degree C  Dewpoint temperature in degree C  Relative Humidity with respect to water in %  Zonal wind component in m/sec  Meridional wind component in m/sec  Mixing ratio in g/kg  Specific Humidity ratio in g/kg  Potential temperature in K  Equivalent potential temperature in K  Saturated equivalent potential temperature in K  Height in meters

Remarks

Quality Control: For Level-2, erroneous data near surface (wrong input of pressure and wind as initial values) were expressed as "9999." As for Level-3/4, humidity data have been adjusted to that obtained by Vaisala RS41. This procedure has been done based on the intercomparison with Vaisala RS41, Cryrogeo Frost-point Hygrometer, and GNSS-derived precipitable water. In these datasets, basically heating/cooling near ground surface in daytime/nighttime were not removed by considering the usage for local impact study. Otherwise (=if applied), such information is provided in the header.