Version:2.5.0
NumericalData
ResourceID
spase://IUGONET/NumericalData/ISEE/SuperDARN/KSR/HFradar/fitacf_ergsc_cdf
ResourceHeader
ResourceName
The common time fitacf CDF data of SuperDARN King Salmon HF radar distributed by ERG-SC
ReleaseDate
2011-04-01 00:00:00
ExpirationDate
2199-12-31 23:59:59
Description
Common time fitacf data obtained by SuperDARN King Salmon HF radar. The data set consists primarily of the backscatter power, spectral width, and Doppler velocity derived with radar echoes in the field-of-view of the radar beams with time resolutions of 1-2 min. Data files are distributed in the Common Data Format (CDF) through the ERG-SC repository
Contacts
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Format
CDF
Acknowledgement
Common mode data obtained by SuperDARN King Salmon HF radar. Data files are distributed in the CDF format through the ERG-SC repository. Data distributed with this CDF file can be used freely for scientific research. Please note that the data are not fully calibrated and may still contain glitches and errors which could yield scientifically wrong or misleading results. We strongly recommend working directly or checking with the PI (Tsutomu Nagatsuma, National Institute of Information and Communications Technology, E-mail: tnagatsu [at] nict.go.jp) and/or researchers of the other SuperDARN PI groups regarding data accuracy and interpretation. Data users must contact the PI before any form of presentation/publication including any fraction or the entire part of data. If our data is used as the main topic of a paper, PI requires co-authorship. If our data is used only as a minor reference, then acknowledgements are sufficient. (Therefore, please first discuss with PI.)
ProcessingLevel
Uncalibrated
InstrumentIDs
MeasurementType
Dopplergram
TemporalDescription
TimeSpan
StartDate
2006-12-02 00:00:00
RelativeStopDate
-P14D
Cadence
PT3S
Exposure
PT3S
ObservedRegion
Earth.NearSurface.Ionosphere.FRegion
ObservedRegion
Earth.NearSurface.Ionosphere.ERegion
SpatialCoverage
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
WGS84
NorthernmostLatitude
89.4
SouthernmostLatitude
58.9
EasternmostLongitude
280.1
WesternmostLongitude
123.8
Keywords
EARTH SCIENCE Sun-earth Interactions Ionosphere/Magnetosphere Dynamics Electric Fields/Electric Currents
Parameter #1
Name
Hardware station ID
Description
The unique numeric ID of the radar
Support
Parameter #2
Name
Hardware year
Description
This and the next parameter describe the date up until which the radar configuration described in the hardware parameter
Support
Parameter #3
Name
Hardware second of year
Description
This and the previous parameter describe the date up until which the radar configuration described in the hardware parameter
Support
Parameter #4
Name
Hardware Geog. Latitude
Description
The geographic latitude of the radar location, given in decimal degrees to 3 decimal places. Southern hemisphere values are negative
Support
SupportQuantity
Positional
Parameter #5
Name
Hardware Geog. Longitude
Description
The geographic longitude of the radar location, in degree given in decimal degrees to 3 decimal places. West longitude values are negative
Support
SupportQuantity
Positional
Parameter #6
Name
Hardware altitude
Description
The altitude above sealevel of the radar location, in meter
Support
SupportQuantity
Positional
Parameter #7
Name
Hardware Scanning Boresite
Description
The direction of the center of the field-of-view of the radar, in degree, relative to geographic North, positive clockwise
Support
SupportQuantity
Positional
Parameter #8
Name
Hardware beam separation
Description
The angular separation of two adjacent beams, in degree. Normally 3.24 degrees
Support
Parameter #9
Name
Hardware vdir
Description
The sign of the velocity direction, either +1 or -1, usually +1.(At the radar level, backscattered signals with frequencies above the transmitted frequency are assigned positive Doppler velocities while backscattered signals with frequencies below the transmitted frequency are assigned negative Doppler velocity. This convention can be reversed by changes in receiver design or in the data samping rate. This parameter is set to +1 or -1 to maintain the convention.)
Support
Parameter #10
Name
Hardware Attenuation Step
Description
The step size of the receiver attenuation in dB
Support
Parameter #11
Name
Hardware Time Difference
Description
The relative time delay of signal paths from the interferometer array to the receiver and the main array to the receiver, in microseconds
Support
Parameter #12
Name
Hardware phidiff
Description
The sign of the phase shift between interferometer and main array, either +1 or -1, usually +1
Support
Parameter #13
Name
Hardware Interferometer Array Position
Description
The offset distance between the mid points of the interferometer and main array, (1st component) in the direction along the main array, positive towards higher antenna numbers, (2nd component) in the direction perpendicular to the main array, positive values indicate that the interferometer array is in front of the main array, (3rd component) in the vertical direction, positive up, in meter
Support
SupportQuantity
Positional
Parameter #14
Name
Hardware Receiver Rise Time
Description
The rise time of the analog receiver, in microseconds
Support
Parameter #15
Name
rgate_no_0
Description
The range gate number for each pixel observed sequantially by the radar for the 75 range gate measurement
Support
Parameter #16
Name
position_tbl_0
Description
The table of geographical Latitudes and longitudes [deg] for the reflection points of radar echoes for the 75 range gate measurement
Support
SupportQuantity
Positional
Parameter #17
Name
Epoch_0
Description
The start time of each beam observation sequence in the CDF epoch format for the 75 range gate measurement
Support
Parameter #18
Name
cpid_0
Description
ID of observation mode for 75 range gate measurement
Support
Parameter #19
Name
channel_0
Description
ID of the channel used for the observation for the 75 range gate measurement. This value should be either of 0 (non-stereo radar) or 1 (channelA of a stereo radar)
Support
Parameter #20
Name
int_time_0
Description
Integration time over which received pulses are integrated to derive the fitting parameters for the 75 range gate measurement
Support
Parameter #21
Name
azim_no_0
Description
Number of the azimuthal direction of radar beam for the 75 range gate measurement
Support
Parameter #22
Name
pwr_0
Description
Backscatter power of radar echoes for the 75 range gate measurement
Wave
WaveType
Electromagnetic
WaveQuantity
Intensity
Parameter #23
Name
pwr_err_0
Description
Error of Backscatter power of radar echoes for the 75 range gate measurement
Wave
WaveType
Electromagnetic
WaveQuantity
Intensity
Parameter #24
Name
spec_width_0
Description
Spectral widths of radar echoes for the 75 range gate measurement
Wave
WaveType
Electromagnetic
WaveQuantity
EquivalentWidth
Parameter #25
Name
spec_width_err_0
Description
Error of spectral widths of radar echoes for the 75 range gate measurement
Wave
WaveType
Electromagnetic
WaveQuantity
EquivalentWidth
Parameter #26
Name
vlos_0
Description
Doppler velocity of radar echoes for the 75 range mode measurement. This Doppler velocity corresponds to the bulk velocity of ionospheric electrons perpendicular to the ambient magnetic field
Particle
ParticleType
Electron
ParticleQuantity
FlowVelocity
Parameter #27
Name
vlos_err_0
Description
Error of Doppler velocity of radar echoes for the 75 range gate measurement
Particle
ParticleType
Electron
ParticleQuantity
FlowVelocity
Parameter #28
Name
elev_angle_0
Description
Elevation angle of returning HF waves observed by a set of the main antennas and the interferometers for the 75 range gate measurement
Field
Qualifier
DirectionAngle.ElevationAngle
FieldQuantity
Electromagnetic
Parameter #29
Name
elev_angle_err_0
Description
Error of elevation angle for the 75 range gate measurement
Field
Qualifier
DirectionAngle.ElevationAngle
FieldQuantity
Electromagnetic
Parameter #30
Name
phi_0
Description
Phase offset derived by calculating the auto correlation function (ACF) for the 75 range gate measurement
Support
Parameter #31
Name
phi_err_0
Description
Error of phase offset for the 75 range gate measurement
Support
Parameter #32
Name
echo_flag_0
Description
Echo flag (ionospheric/ground) of radar echoes for 75 range gate measurement. 1: ionospheric echo, 0: ground scatter, based on the empirical criteria by Millan et al.
Support
Parameter #33
Name
quality_0
Description
Data quality flag of radar echoes for the 75 range gate measurement. This value is how many criteria (described in "quality_flag_?" in detail) are satisfied. 0 means that no condition for bad/poor data is satisfied, that is, the data is in good shape. The data quality becomes worse as quality_? increases
Support
Parameter #34
Name
quality_flag_0
Description
Breakdown of judgements for criteria in evaluating the data quality flag of radar echoes for the 75 range gate measurement. Each bit status of this value (1 byte integer) show if each criterion is satisfied. LSB: backscatter power is less 3dB, 2nd bit: currently unused, 3rd bit: spectral width is greater than 1000 m/s, 4th bit (MSB): currently unused
Support
Parameter #35
Name
scanno_0
Description
Serial number (in a CDF file) referring to each 2D scan. (Nominally 16) beams with the same scanno_? form a full field-of-view scan.
Support
Parameter #36
Name
scanstartflag_0
Description
If this value is 1, then the current beam is the start of a new 2D scan
Support
Parameter #37
Name
lagfr_0
Description
The lag time in microsecond for the first range gate for the 75 range gate measurement
Support
Parameter #38
Name
smsep_0
Description
The sampling separation in microsecond between neighboring range gates
Support
Parameter #39
Name
nrang_max_0
Description
Maximum range gate number for the 75 range gate measurement. This should be 75
Support
Parameter #40
Name
tfreq_0
Description
Frequency in kHz of transmitted HF waves for the 75 range gate measurement
Wave
WaveType
Electromagnetic
WaveQuantity
Frequency
Parameter #41
Name
noise_0
Description
Noise level (in dB) in receiving radar echoes for the 75 range gate measurement
Support
Parameter #42
Name
num_ave_0
Description
This value shows how many pulse sequences are integrated to evaluate ACFs for a beam
Support
Parameter #43
Name
txpl_0
Description
Time width in microsecond of the entire pulse sequences for each range gate for the 75 range gate measurement
Support
Parameter #44
Name
rgate_no_2
Description
The range gate number for each pixel observed sequantially by the radar for the 70 range gate measurement
Support
Parameter #45
Name
position_tbl_2
Description
The table of geographical Latitudes and longitudes [deg] for the reflection points of radar echoes for the 70 range gate measurement
Support
SupportQuantity
Positional
Parameter #46
Name
Epoch_2
Description
The start time of each beam observation sequence in the CDF epoch format for the 70 range gate measurement
Support
Parameter #47
Name
cpid_2
Description
ID of observation mode for 70 range gate measurement
Support
Parameter #48
Name
channel_2
Description
ID of the channel used for the observation for the 70 range gate measurement. This value should be either of 0 (non-stereo radar) or 1 (channelA of a stereo radar)
Support
Parameter #49
Name
int_time_2
Description
Integration time over which received pulses are integrated to derive the fitting parameters for the 70 range gate measurement
Support
Parameter #50
Name
azim_no_2
Description
Number of the azimuthal direction of radar beam for the 70 range gate measurement
Support
Parameter #51
Name
pwr_2
Description
Backscatter power of radar echoes for the 70 range gate measurement
Wave
WaveType
Electromagnetic
WaveQuantity
Intensity
Parameter #52
Name
pwr_err_2
Description
Error of Backscatter power of radar echoes for the 70 range gate measurement
Wave
WaveType
Electromagnetic
WaveQuantity
Intensity
Parameter #53
Name
spec_width_2
Description
Spectral widths of radar echoes for the 70 range gate measurement
Wave
WaveType
Electromagnetic
WaveQuantity
EquivalentWidth
Parameter #54
Name
spec_width_err_2
Description
Error of spectral widths of radar echoes for the 70 range gate measurement
Wave
WaveType
Electromagnetic
WaveQuantity
EquivalentWidth
Parameter #55
Name
vlos_2
Description
Doppler velocity of radar echoes for the 70 range mode measurement. This Doppler velocity corresponds to the bulk velocity of ionospheric electrons perpendicular to the ambient magnetic field
Particle
ParticleType
Electron
ParticleQuantity
FlowVelocity
Parameter #56
Name
vlos_err_2
Description
Error of Doppler velocity of radar echoes for the 70 range gate measurement
Particle
ParticleType
Electron
ParticleQuantity
FlowVelocity
Parameter #57
Name
elev_angle_2
Description
Elevation angle of returning HF waves observed by a set of the main antennas and the interferometers for the 70 range gate measurement
Field
Qualifier
DirectionAngle.ElevationAngle
FieldQuantity
Electromagnetic
Parameter #58
Name
elev_angle_err_2
Description
Error of elevation angle for the 70 range gate measurement
Field
Qualifier
DirectionAngle.ElevationAngle
FieldQuantity
Electromagnetic
Parameter #59
Name
phi_2
Description
Phase offset derived by calculating the auto correlation function (ACF) for the 70 range gate measurement
Support
Parameter #60
Name
phi_err_2
Description
Error of phase offset for the 70 range gate measurement
Support
Parameter #61
Name
echo_flag_2
Description
Echo flag (ionospheric/ground) of radar echoes for 70 range gate measurement. 1: ionospheric echo, 0: ground scatter, based on the empirical criteria by Millan et al.
Support
Parameter #62
Name
quality_2
Description
Data quality flag of radar echoes for the 70 range gate measurement. This value is how many criteria (described in "quality_flag_?" in detail) are satisfied. 0 means that no condition for bad/poor data is satisfied, that is, the data is in good shape. The data quality becomes worse as quality_? increases
Support
Parameter #63
Name
quality_flag_2
Description
Breakdown of judgements for criteria in evaluating the data quality flag of radar echoes for the 70 range gate measurement. Each bit status of this value (1 byte integer) show if each criterion is satisfied. LSB: backscatter power is less 3dB, 2nd bit: currently unused, 3rd bit: spectral width is greater than 1000 m/s, 4th bit (MSB): currently unused
Support
Parameter #64
Name
scanno_2
Description
Serial number (in a CDF file) referring to each 2D scan. (Nominally 16) beams with the same scanno_? form a full field-of-view scan.
Support
Parameter #65
Name
scanstartflag_2
Description
If this value is 1, then the current beam is the start of a new 2D scan
Support
Parameter #66
Name
lagfr_2
Description
The lag time in microsecond for the first range gate for the 70 range gate measurement
Support
Parameter #67
Name
smsep_2
Description
The sampling separation in microsecond between neighboring range gates
Support
Parameter #68
Name
nrang_max_2
Description
Maximum range gate number for the 70 range gate measurement. This should be 70
Support
Parameter #69
Name
tfreq_2
Description
Frequency in kHz of transmitted HF waves for the 70 range gate measurement
Wave
WaveType
Electromagnetic
WaveQuantity
Frequency
Parameter #70
Name
noise_2
Description
Noise level (in dB) in receiving radar echoes for the 70 range gate measurement
Support
Parameter #71
Name
num_ave_2
Description
This value shows how many pulse sequences are integrated to evaluate ACFs for a beam
Support
Parameter #72
Name
txpl_2
Description
Time width in microsecond of the entire pulse sequences for each range gate for the 70 range gate measurement
Support