Version:2.5.0
NumericalData
ResourceID
spase://IUGONET/NumericalData/RISH/misc/SGK/MUradar/mur_sgk_ionostd_netcdf
ResourceHeader
ResourceName
Observation data in the ionosphere taken by the MU radar (NetCDF format)
ReleaseDate
2016-11-17 23:03:00
Description
The 1-hour average observation data of ion drift velocities, electron and ion temperatures and echo power in the ionosphere taken by the MU radar at Shigaraki in Shiga Prefecture, Japan (34.86N, 136.11E, 385m MSL), which has been operated in the incoherent scatter observation mode. The data are stored in the netCDF (network Common Data Form) file named (year)(month)(day)_(variable).nc. The variable abbreviations are dv, teti, and pwr which mean plasma drift, electron and ion temperatures and echo power, respectively. The plasama drift data include nine kinds of drift velocity components for eastward and northward/upward directions perpendicular to the magnetic field line, southward/upward direction parallel to the magnetic field line, vertical direction calculated from northward and southward beams, vertical direction calculated from eastward and westward beams, and for beam 1-4 directions, respectively. The azimuth and zenith angles of beam 1, 2, 3, and 4 are (355.0, 20.0), (85.0, 20.0), (175.0, 20.0), and (265.0, 20.0), respectively, in unit of degree. The temperature data include electron and ion temperature, their error values, condition code and signal to noise ratio between 228.5 and 724.6 km. The echo power data show the intensity of electromagnetic wave reflected from the ionosphere between 80 and 1,200 km for radar beam 1-4 directions. The value of -999.0 means missing data. Local time (UT + 09:00) is used for time data. The plasma drift and temperature data are essential for understanding of ionospheric plasma dynamics and chemical reactions of electron and ions in the middle latitude.
Acknowledgement
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.
Contacts
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
MU Ionospheric Observation
URL
Language
English
Format
NetCDF
InstrumentIDs
MeasurementType
Profile
TemporalDescription
TimeSpan
StartDate
1986-09-16 15:00:00
RelativeStopDate
-P7D
Cadence
PT1H
SpectralRange
RadioFrequency
ObservedRegion
Earth.NearSurface.Ionosphere
ObservedRegion
Earth.NearSurface.Ionosphere.ERegion
ObservedRegion
Earth.NearSurface.Ionosphere.FRegion
ObservedRegion
Earth.NearSurface.Ionosphere.Topside
SpatialCoverage
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
WGS84
NorthernmostLatitude
34.856
SouthernmostLatitude
34.856
EasternmostLongitude
136.106
WesternmostLongitude
136.106
MinimumElevation
228.5
MaximumElevation
724.6
Keywords
EARTH SCIENCE Sun-earth Interactions Ionosphere/Magnetosphere Dynamics Ion Chemistry/Ionization
Parameter #1
Name
lat
Description
Latitude of radar location
Units
degree_north
Support
SupportQuantity
Positional
Parameter #2
Name
lon
Description
Longitude of radar location
Units
degree_east
Support
SupportQuantity
Positional
Parameter #3
Name
obsdate
Description
Observational date
Units
Date (YYYYMMDD)
Support
Parameter #4
Name
time
Description
Seconds since 1991-09-11 00:00:00 +09:00
Units
second
Support
Parameter #5
Name
beam
Description
Index of radar beam
Units
1
Support
Parameter #6
Name
az
Description
Azimuth angle of each radar beam
Units
degree
Support
SupportQuantity
Positional
Parameter #7
Name
ze
Description
Zenith angle of each radar beam
Units
degree
Support
SupportQuantity
Positional
Parameter #8
Name
Vperp_e
Description
Ion drift velocity (eastward direction perpendicular to the magnetic field line)
Units
m/s
FillValue
-999.0
Particle
ParticleType
Ion
ParticleQuantity
Velocity
Parameter #9
Name
Vperp_n
Description
Ion drift velocity (northward/upward direction perpendicular to the magnetic field line)
Units
m/s
FillValue
-999.0
Particle
ParticleType
Ion
ParticleQuantity
Velocity
Parameter #10
Name
Vpara_u
Description
Ion drift velocity (southward/upward direction parallel to the magnetic field line)
Units
m/s
FillValue
-999.0
Particle
ParticleType
Ion
ParticleQuantity
Velocity
Parameter #11
Name
Vz_ns
Description
Ion drift velocity (vertical direction calculated from northward and southward beams)
Units
m/s
FillValue
-999.0
Particle
ParticleType
Ion
ParticleQuantity
Velocity
Parameter #12
Name
Vz_ew
Description
Ion drift velocity (vertical direction calculated from eastward and westward beams)
Units
-999.0
FillValue
FillValue
Particle
ParticleType
Ion
ParticleQuantity
Velocity
Parameter #13
Name
Vd_b
Description
Ion drift velocity for radar beam 1-4 directions
Units
m/s
FillValue
-999.0
Particle
ParticleType
Ion
ParticleQuantity
Velocity
Parameter #14
Name
Ti
Description
Ion temperature
Units
K
FillValue
-999.0
Particle
ParticleType
Ion
ParticleQuantity
Temperature
Parameter #15
Name
Te
Description
Electron temperature
Units
K
FillValue
-999.0
Particle
ParticleType
Electron
ParticleQuantity
Temperature
Parameter #16
Name
icon
Description
Condition code (0 is normal. 0, 1 and 4 are available)
Units
1
Support
Parameter #17
Name
er_ti
Description
Error of estimate for ion temperature
Units
K
FillValue
-999.0
Particle
ParticleType
Ion
ParticleQuantity
Temperature
Parameter #18
Name
er_te
Description
Error of estimate for electron temperature
Units
K
FillValue
-999.0
Particle
ParticleType
Electron
ParticleQuantity
Temperature
Parameter #19
Name
er_tr
Description
Error of estimate for Tr (= Te/Ti)
Units
1
FillValue
-999.0
Support
Parameter #20
Name
snr
Description
Signal to noise ratio
Units
dB
FillValue
-999.0
Wave
WaveType
Electromagnetic
WaveQuantity
Intensity
Parameter #21
Name
pwr
Description
Echo power for radar beam 1-4 directions
Units
dB
FillValue
-999.0
Wave
WaveType
Electromagnetic
WaveQuantity
Intensity