Mesospheric observation data taken by the MU radar at Shigaraki (netCDF format)

2013-07-22 00:00:00

The observation data in the mesosphere (60-100 km) taken by the MU radar at Shigaraki in Shiga Prefecture, Japan (34.86N, 136.11E, 385m MSL), which has been operated in the standard observation mode of the mesosphere. The data are stored in the netCDF (network Common Data Form) file named (year)(month)(day).wnd.nc (wind data) and (year)(month)(day).nc (other data). The azimuth and zenith angles of beam 1, 2, 3, 4 and 5 are (0, 0), (0, 10), (90, 10), (180, 10) and (270, 10), respectively, in unit of degree. The time interval of data is the same as that of the original data, but the wind data are 1 hour average. The value of 999 contained in the wind data means missing value. The information of condition code and flag can be found in the README (http://www.rish.kyoto-u.ac.jp/mu/mesosphere/note/README_mur_mesosphere_data.html and http://www.rish.kyoto-u.ac.jp/mu/mesosphere/note/README_mur_mesosphere_wind_data.html).

If you acquire MU radar data, we ask that you acknowledge us in your use of the data. This may be done by including text such as MU radar data provided by Research Institute for Sustainable Humanosphere of Kyoto University. We would also appreciate receiving a copy of the relevant publications.

Online

Open

NetCDF

PT3M

34.856

34.856

136.106

136.106

58.61

97.61

lat

Latitude of radar location

degree_north

lon

Longitude of radar location

degree_east

sealvl

Mean sea level of radar location

m

bmwdh

Radar beam width in one-way half-power full width

degree

az

Azimuth angle of each radar beam

degree

ze

Zenith angle of each radar beam

degree

date

Observation date

year, month, day

time

Seconds since midnight of every day. Local time (UT + 09:00:00) is used for time data.

second

height_v

Height in vertical beam

km

height_mz

Height in oblique beams

km

range

Range of radar beam

km

uwnd

Zonal wind (eastward is positive).

m/s

vwnd

Meridional wind (northward is positive).

m/s

wind

Vertical wind (Upflow is positive).

m/s

flg_uwnd

Flag of zonal wind. It represents the quality of wind data calculated from 1-hour average of radial Doppler velocity for radar beam 1-5, and this value is the integer of 0 and 1. For 1-hour average, only the data satisfied with the above screening condition are used. If the wind data are missing value (999.0), the flag value is also 999. The flag 1 of zonal and meridional wind means that magnitude of the sum of 1-hour average of radial Doppler velocity of beam 2 and 4 or 3 and 5 used for caluculation of wind data is more than 5.0 at each altitude. The flag 1 of vertical wind means that magnitude of 1-hour average of radial Doppler velocity of vertical beam is more than 5.0. These wind data strongly effect on the contamination of radio interference or are not satisfied with the assumption that horizontal wind is uniform in the observation region of the MU radar. If you want to analyze the wind data with high quality in the mesosphere, you should select the data with flag 0.

1

flg_vwnd

Flag of meridional wind. It represents the quality of wind data calculated from 1-hour average of radial Doppler velocity for radar beam 1-5, and this value is the integer of 0 and 1. For 1-hour average, only the data satisfied with the above screening condition are used. If the wind data are missing value (999.0), the flag value is also 999. The flag 1 of zonal and meridional wind means that magnitude of the sum of 1-hour average of radial Doppler velocity of beam 2 and 4 or 3 and 5 used for caluculation of wind data is more than 5.0 at each altitude. The flag 1 of vertical wind means that magnitude of 1-hour average of radial Doppler velocity of vertical beam is more than 5.0. These wind data strongly effect on the contamination of radio interference or are not satisfied with the assumption that horizontal wind is uniform in the observation region of the MU radar. If you want to analyze the wind data with high quality in the mesosphere, you should select the data with flag 0.

1

flg_wwnd

Flag of vertical wind. It represents the quality of wind data calculated from 1-hour average of radial Doppler velocity for radar beam 1-5, and this value is the integer of 0 and 1. For 1-hour average, only the data satisfied with the above screening condition are used. If the wind data are missing value (999.0), the flag value is also 999. The flag 1 of zonal and meridional wind means that magnitude of the sum of 1-hour average of radial Doppler velocity of beam 2 and 4 or 3 and 5 used for caluculation of wind data is more than 5.0 at each altitude. The flag 1 of vertical wind means that magnitude of 1-hour average of radial Doppler velocity of vertical beam is more than 5.0. These wind data strongly effect on the contamination of radio interference or are not satisfied with the assumption that horizontal wind is uniform in the observation region of the MU radar. If you want to analyze the wind data with high quality in the mesosphere, you should select the data with flag 0.

1

pwr

Echo power for beam 1-5.

dB

wdt

Spectral width for beam 1-5.

m/s

dpl

Radial Doppler velocity away from the radar for beam 1-5.

m/s

if_cond

This parameter is the condition code showing the quality of the original data calculated from nonlinear least-square fitting by the Gauss-Newton method, and this value is the integer from 0 to 4. When this value becomes large, the quality of the original data decreases. Moreover, in this data set, for the data not satisfied with the screening condition shown below, this value is replaced by the original condition code plus 10000. If you want to analyze the screening data in the mesosphere, you should exclude the data with condition code of 10000 or more.

1

pnoise

Noise level for beam 1-5.

dB