HPDE.io

Alouette-2 Topside Sounder Average Ionogram over Falkland Island, United Kingdom: SOL, Latitude -52, Longitude 302

ResourceID
spase://NASA/NumericalData/Alouette2/SFS/AverageIonogram/FalklandIslands/PT31S

Description

This Ionogram was digitized from the original Alouette 2 Analog Telemetry Data on 7-Track Tape using the Facilities of the Data Evaluation Laboratory at NASA GSFC, Code 500. This Data Restoration Project is headed by Dr. R.F. Benson, NASA GSFC, Code 692. Ionograms were digitized at the Rate of 40,000 16-bit samples/s. This Sample Rate is higher than the Nyquist Frequency of 30 kHz. The Sample Frequency of 40 kHz provides a Measurement every 25 ms corresponding to an Apparent Range Interval of c*t/2, where c is the Speed of Light, or 3.747 km. Each Ionogram consists of a Fixed Frequency Portion and a Swept Frequency Portion. The Time Resolution is typically 31 s.

View XML | View JSON | Edit

Details

Version:2.2.8

NumericalData

ResourceID
spase://NASA/NumericalData/Alouette2/SFS/AverageIonogram/FalklandIslands/PT31S
ResourceHeader
ResourceName
Alouette-2 Topside Sounder Average Ionogram over Falkland Island, United Kingdom: SOL, Latitude -52, Longitude 302
ReleaseDate
2020-07-07 21:14:17Z
Description

This Ionogram was digitized from the original Alouette 2 Analog Telemetry Data on 7-Track Tape using the Facilities of the Data Evaluation Laboratory at NASA GSFC, Code 500. This Data Restoration Project is headed by Dr. R.F. Benson, NASA GSFC, Code 692. Ionograms were digitized at the Rate of 40,000 16-bit samples/s. This Sample Rate is higher than the Nyquist Frequency of 30 kHz. The Sample Frequency of 40 kHz provides a Measurement every 25 ms corresponding to an Apparent Range Interval of c*t/2, where c is the Speed of Light, or 3.747 km. Each Ionogram consists of a Fixed Frequency Portion and a Swept Frequency Portion. The Time Resolution is typically 31 s.

Acknowledgement
James H. Whitteker, Robert F. Benson, Dieter K. Bilitza. Please thank James H. Whitteker, Principal Investigator for the Alouette 2 Swept Frequency Sounder, SFS, Instrument and Robert F. Benson, Project Scientist for the Alouette/ISIS Data-Restoration
Contacts
RolePerson
1.PrincipalInvestigatorspase://SMWG/Person/James.H.Whitteker
2.GeneralContactspase://SMWG/Person/Robert.F.Benson
3.GeneralContactspase://SMWG/Person/Dieter.K.Bilitza
4.MetadataContactspase://SMWG/Person/Leonard.N.Garcia
5.MetadataContactspase://SMWG/Person/Robert.E.McGuire
6.MetadataContactspase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
ISIS/Alouette Topside Sounder Data Restoration Project Site
URL
https://spdf.gsfc.nasa.gov/isis/isis-status.html
Description

ISIS/Alouette Page maintained by NASA GSFC with Science and Instrument Descriptions, Data Access, Software, and Publication Lists

InformationURL
Name
NSSDC Master Catalog
URL
https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1965-098A
Description

Information about the Swept Frequency Sounder, SFS, Experiment on Alouette 2

PriorIDs
spase://VSPO/NumericalData/Alouette2/SFS/AverageIonogram/FalklandIslands/PT31S
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/alouette/topside_sounder/ionogram_cdaweb/alouette2/SOL_52S_302E/
Description

Access to Data in CDF Format via ftp from SPDF

AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/alouette/topside_sounder/ionogram_cdaweb/alouette2/SOL_52S_302E/
Description

Access to Data in CDF Format via http from SPDF

AccessURL
Name
CDAWeb
URL
https://cdaweb.gsfc.nasa.gov/index.html/
ProductKey
ALOUETTE2_AV_SOL
Description

Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb

Format
CDF
Encoding
None
Acknowledgement
James H. Whitteker, Robert F. Benson, Dieter K. Bilitza. Please thank James H. Whitteker, Principal Investigator for the Alouette 2 Swept Frequency Sounder, SFS, Instrument and Robert F. Benson, Project Scientist for the Alouette/ISIS Data-Restoration. Please acknowledge the data providers and CDAWeb when using these data.
ProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/Alouette2/SFS
MeasurementType
Spectrum
MeasurementType
Waves.Active
TemporalDescription
TimeSpan
StartDate
1965-12-01 01:31:39
StopDate
1966-12-28 03:00:28
Note
The Cadence is 31 s between Ionograms. The Alouette 2 Ionograms have the slowest Sweep Rate of any of the Alouette/ISIS Topside Sounders sweeping from 0.12 to 14.5 MHz in about 28 s with a Frequency Sweep Rate of 0.13 MHz/s below 2.0 MHz, providing the highest Frequency Resolution of any of the ISIS Program Sounders. The Alouette 2 Frequency Sweep Rate above 2 MHz was 1 MHz/s. Alouette 2 did not have a Fixed Frequency Operation.
Cadence
PT31S
SpectralRange
RadioFrequency
ObservedRegion
Earth.Magnetosphere
ObservedRegion
Earth.Magnetosphere.Polar
ObservedRegion
Earth.NearSurface
ObservedRegion
Earth.NearSurface.AuroralRegion
ObservedRegion
Earth.NearSurface.EquatorialRegion
ObservedRegion
Earth.NearSurface.Ionosphere
ObservedRegion
Earth.NearSurface.PolarCap
Keywords
Ionogram
Topside Sounder
Swept Frequency Sounder
Topside Ionosphere
Ionospheric Reflections
Ground Reflections
Ionospheric Echoes
Ground Echoes
Ducted Echoes
Wave Scattering
Field-Aligned Irregularities, FAI
Plasma Resonance
Plasma Waves
Auroral Kilometric Radiation, AKR
Solar Type III Bursts
Upper Hybrid Noise Band
Parameter #1
Name
Satellite ID
ParameterKey
satellite
Description

Satellite ID: 1=Alouette 1, 2=Alouette 2, 3=ISIS 1, 4=ISIS 2

Cadence
PT31S
RenderingHints
AxisLabel
s/c_ID
ValueFormat
I1
ScaleMin
1
ScaleMax
4
ValidMin
1
ValidMax
4
FillValue
-2147483648
Support
SupportQuantity
Other
Parameter #2
Name
Telemetry Station Code
ParameterKey
station_id
Description

Two-Digit Telemetry Station Code

Cadence
PT31S
RenderingHints
AxisLabel
station
ValueFormat
I2
ScaleMin
1
ScaleMax
99
ValidMin
1
ValidMax
99
FillValue
-2147483648
Support
SupportQuantity
Other
Parameter #3
Name
Transmitter Power Code
ParameterKey
power_code
Description

Transmitter Power Code: 1=Primary, 400 W, 2=Secondary, 400 W

Cadence
PT31S
RenderingHints
AxisLabel
T_power
ValueFormat
I1
ScaleMin
1
ScaleMax
2
ValidMin
1
ValidMax
2
FillValue
-2147483648
Support
SupportQuantity
InstrumentMode
Parameter #4
Name
Sounder-Receiver Code
ParameterKey
s/r_code
Description

Sounder-Receiver Code: 0=Off, 1=On

Cadence
PT31S
RenderingHints
AxisLabel
s/r_code
ValueFormat
I1
ScaleMin
0
ScaleMax
1
ValidMin
0
ValidMax
1
FillValue
-2147483648
Support
SupportQuantity
InstrumentMode
Parameter #5
Name
Pulse per Second Code
ParameterKey
pps_code
Description

Pulse per Second Code: 0=30 Pulses/s, 1=60 Pulses/s

Cadence
PT31S
RenderingHints
AxisLabel
pps_code
ValueFormat
I1
ScaleMin
0
ScaleMax
1
ValidMin
0
ValidMax
1
FillValue
-2147483648
Support
SupportQuantity
InstrumentMode
Parameter #6
Name
DMODE Code
ParameterKey
DMODE
Description

DMODE, Transmission On/Off for Alternate Frame Pairs: 0=Off, 1=On

Cadence
PT31S
RenderingHints
AxisLabel
DMODE
ValueFormat
I1
ScaleMin
0
ScaleMax
1
ValidMin
0
ValidMax
1
FillValue
-2147483648
Support
SupportQuantity
InstrumentMode
Parameter #7
Name
GMODE Code
ParameterKey
GMODE
Description

GMODE, Transmission of Alternate Frames of Fixed Frequency and Swept Frequency: 0=Off, 1=On

Cadence
PT31S
RenderingHints
AxisLabel
GMODE
ValueFormat
I1
ScaleMin
0
ScaleMax
1
ValidMin
0
ValidMax
1
FillValue
-2147483648
Support
SupportQuantity
InstrumentMode
Parameter #8
Name
Sounder Mixed Mode
ParameterKey
mixed_mode
Description

Sounder Mixed Mode, Transmission at a Fixed Frequency while the Sounder-Receiver sweeps over the Swept Frequency Range: 0=Off, 1=On

Cadence
PT31S
RenderingHints
AxisLabel
s_m_mode
ValueFormat
I1
ScaleMin
0
ScaleMax
1
ValidMin
0
ValidMax
1
FillValue
-2147483648
Support
SupportQuantity
InstrumentMode
Parameter #9
Name
Fixed Frequency Code
ParameterKey
fix_freq
Description

Fixed Frequency Code: 0=Off, 1=0.25 MHz, 2=0.48 MHz, 3=1.00 MHz, 4=1.95 MHz, 5=4.00 MHz, 6=9.303 MHz

Cadence
PT31S
RenderingHints
AxisLabel
f_code
ValueFormat
I1
ScaleMin
0
ScaleMax
6
ValidMin
0
ValidMax
6
FillValue
-2147483648
Support
SupportQuantity
InstrumentMode
Parameter #10
Name
Year
ParameterKey
year
Description

Year of Ionogram Frame Sync

Cadence
PT31S
RenderingHints
AxisLabel
year
ValueFormat
I2
ScaleMin
62
ScaleMax
83
ValidMin
62
ValidMax
84
FillValue
-2147483648
Support
SupportQuantity
Temporal
Parameter #11
Name
Day of Year
ParameterKey
doy
Description

Day of Year of Ionogram Frame Sync

Cadence
PT31S
RenderingHints
AxisLabel
DOY
ValueFormat
I3
ScaleMin
1
ScaleMax
366
ValidMin
1
ValidMax
366
FillValue
-2147483648
Support
SupportQuantity
Temporal
Parameter #12
Name
Hour of Day
ParameterKey
hr
Description

Hour of Day of Ionogram Frame Sync, UT

Cadence
PT31S
RenderingHints
AxisLabel
Hour
ValueFormat
I2
ScaleMin
0
ScaleMax
24
ValidMin
0
ValidMax
24
FillValue
-2147483648
Support
SupportQuantity
Temporal
Parameter #13
Name
Minute of Hour
ParameterKey
min
Description

Minute of Hour of Ionogram Frame Sync, UT

Cadence
PT31S
RenderingHints
AxisLabel
min
ValueFormat
I2
ScaleMin
0
ScaleMax
60
ValidMin
0
ValidMax
60
FillValue
-2147483648
Support
SupportQuantity
Temporal
Parameter #14
Name
Second of Minute
ParameterKey
sec
Description

Second of Minute of Ionogram Frame Sync, UT

Cadence
PT31S
RenderingHints
AxisLabel
second
ValueFormat
F7.4
ScaleMin
0.0
ScaleMax
60.0
ValidMin
0.0
ValidMax
60.0
FillValue
-1.0e+31
Support
SupportQuantity
Temporal
Parameter #15
Name
Local Mean Time
ParameterKey
LMT
Description

Local Mean Time, LMT, at the Time of Ionogram Frame Sync, Format: HH,MM

Cadence
PT31S
RenderingHints
ValueFormat
I2
Structure
Size
2
Element
Name
Element 1
Index
1
Units
h
UnitsConversion
60>s
ValidMin
0
ValidMax
24
RenderingHints
AxisLabel
LMT(hh)
ScaleMin
0
ScaleMax
24
Element
Name
Element 2
Index
2
Units
min
UnitsConversion
3600>s
ValidMin
0
ValidMax
60
RenderingHints
AxisLabel
LMT(mm)
ScaleMin
0
ScaleMax
60
FillValue
-2147483648
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #16
Name
Geographic Coordinates
ParameterKey
geo_coord
Description

Geographic Coordinates, GEO, Latitude, Longitude, Height, at the Time of Ionogram Frame Sync

Cadence
PT31S
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GEO
RenderingHints
ValueFormat
F7.2
Structure
Size
3
Element
Name
Element 1
Index
1
Units
°
UnitsConversion
0.0174532925>rad
ValidMin
-90.0
ValidMax
90.0
RenderingHints
AxisLabel
latitude
ScaleMin
-90.0
ScaleMax
90.0
Element
Name
Element 2
Index
2
Units
°
UnitsConversion
0.0174532925>rad
ValidMin
0.0
ValidMax
360.0
RenderingHints
AxisLabel
longitude
ScaleMin
0.0
ScaleMax
360.0
Element
Name
Element 3
Index
3
Units
km
UnitsConversion
1e3>m
ValidMin
0.0
ValidMax
10000.0
RenderingHints
AxisLabel
height
ScaleMin
0.0
ScaleMax
10000.0
FillValue
-1.0e+31
Support
Qualifier
Vector
SupportQuantity
Positional
Parameter #17
Name
Geomagnetic Local Time
ParameterKey
GMLMT
Description

Geomagnetic Local Time, GMLMT, Format: HH,MM, at the Time of Ionogram Frame Sync

Cadence
PT31S
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
LGM
RenderingHints
ValueFormat
I2
Structure
Size
2
Element
Name
Element 1
Index
1
Units
h
UnitsConversion
60>s
ValidMin
0
ValidMax
24
RenderingHints
AxisLabel
GMLMT(hh)
ScaleMin
0
ScaleMax
24
Element
Name
Element 2
Index
2
Units
min
UnitsConversion
3600>s
ValidMin
0
ValidMax
60
RenderingHints
AxisLabel
GMLMT(mm)
ScaleMin
0
ScaleMax
60
FillValue
-2147483648
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #18
Name
Geomagnetic Latitude
ParameterKey
GMLAT
Description

Geomagnetic Latitude, MAG, at the Time of Ionogram Frame Sync

Cadence
PT31S
Units
°
UnitsConversion
0.0174532925>rad
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
MAG
RenderingHints
AxisLabel
geom_lat
ValueFormat
F7.2
ScaleMin
-90.0
ScaleMax
90.0
ValidMin
-90.0
ValidMax
90.0
FillValue
-1.0e+31
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional
Parameter #19
Name
Geomagnetic Longitude
ParameterKey
GMLONG
Description

Geomagnetic Longitude, MAG, at the Time of Ionogram Frame Sync

Cadence
PT31S
Units
°
UnitsConversion
0.0174532925>rad
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
MAG
RenderingHints
AxisLabel
geom_long
ValueFormat
F7.2
ScaleMin
-180.0
ScaleMax
180.0
ValidMin
-180.0
ValidMax
360.0
FillValue
-1.0e+31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #20
Name
Sounder Amplitude
Set
Time series defined by using: EPOCH
ParameterKey
ampl
Description

Sounder Amplitude at 335 Virtual Heights for Fixed Frequency and Swept Frequency, Ionogram. The Sounder-Receiver Linear Video Amplitude, from 0 to 255 Telemetry Units, in each Apparent Range Bin of each Scan Line covering the Fixed Frequency and Swept Frequency Regions. This Range corresponds to a Linear Sounder-Receiver Video Amplitude Output Range from 0 V to 4.5 V. This Calibration is based on the Video Calibration Pulse, of 3.0 V or 170 Telemetry Units, at the End of the Line Scan following each Sounder Pulse. The Combined Calibration Pulses from all of the Line Scans produces a Colored Stripe at the Bottom of the Digital Ionograms. In order to derive an Input Power Level corresponding to the Receiver Video Output, it is necessary to know the Sounder-Receiver Automatic Gain Control, AGC, Voltage. This Voltage was obtained from the Pulse Code Modulation, PCM, Data and thus is only available if PCM Data were available. The AGC Voltage, which ranges from 0 V to 5.12 V, is obtained from a Linear Interpolation between the AGC Trace displayed between the 4005 km Apparent Range, at 26.7 ms Delay Time, as 5.12 V and the 4395 km, at 29.3 ms Delay Time, as 0 V. On the Full Ionograms these Numbers are 4001.250 km or 26.675 ms and 4398.750 km or 29.325 ms. On the Average Ionograms, which are available as either CDF or Binary Files from the SPDF or the NSSDC, the Range Resolution is 0.1 ms, corresponding to a Virtual Range Resolution of 15 km. There are 27 Rows an thus 26 Intervals covering the 0 V to 5.12 V Range; thus each Row in Virtual Range above, i.e. decreasing Delay Time, the Zero Level at 29.3 ms Delay Time corresponds to an Increase of 5.12/26 V of AGC with a Quantization Uncertainty of approximately Plus or Minus 0.1 V. Two Rows have Zero Video Output Amplitude Values on the Average Ionograms in order that a clear AGC Trace is visible on the Ionograms. The Row with the greatest Virtual Range corresponds to the actual AGC Value. On the Full Ionograms, which are only available as Binary Files from the NSSDC, the Range Resolution is 0.025 ms, corresponding to a Virtual Range Resolution of 3.75 km, and three Rows have Zero Video Output Amplitude Values; the middle Row corresponds to the actual AGC Value.

Cadence
PT31S
RenderingHints
ValueFormat
I3
Structure
Size
335
FillValue
-128
Wave
WaveType
PlasmaWaves
Qualifier
Magnitude
Qualifier
Pseudo
WaveQuantity
Intensity
Parameter #21
Name
Electron Local Gyrofrequency
Set
Time series defined by using: EPOCH
ParameterKey
FH
Description

Electron Local Gyrofrequency, at the Time of Ionogram Frame Sync

Cadence
PT31S
Units
rad/s
RenderingHints
DisplayType
TimeSeries
AxisLabel
Electron Gyrofrequency
ValueFormat
F7.3
ScaleMin
0.0
ScaleMax
100.0
ValidMin
0.0
ValidMax
100.0
FillValue
-1.0e+31
Particle
ParticleType
Electron
ParticleQuantity
Gyrofrequency
Parameter #22
Name
Invariant Latitude
ParameterKey
INV_LAT
Description

Invariant Latitude, at the Time of Ionogram Frame Sync

Cadence
PT31S
Units
°
UnitsConversion
0.0174532925>rad
RenderingHints
AxisLabel
inv_lat
ValueFormat
F7.2
ScaleMin
-90.0
ScaleMax
90.0
ValidMin
-90.0
ValidMax
90.0
FillValue
-1.0e+31
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional
Parameter #23
Name
Magnetic Inclination
ParameterKey
DIP
Description

Magnetic Inclination, Dip Angle of Magnetic Field Direction, at the Time of Ionogram Frame Sync

Cadence
PT31S
Units
°
UnitsConversion
0.0174532925>rad
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
LGM
RenderingHints
AxisLabel
DIP
ValueFormat
I3
ScaleMin
-90
ScaleMax
90
ValidMin
-90
ValidMax
90
FillValue
-2147483648
Field
Qualifier
DirectionAngle.ElevationAngle
FieldQuantity
Magnetic
Parameter #24
Name
Solar Zenith Angle
ParameterKey
CHI
Description

Solar Zenith Angle, SZA, at the Time of Ionogram Frame Sync

Cadence
PT31S
Units
°
UnitsConversion
0.0174532925>rad
RenderingHints
AxisLabel
CHI
ValueFormat
F7.2
ScaleMin
0
ScaleMax
180
ValidMin
0
ValidMax
180
FillValue
-2147483648
Support
Qualifier
DirectionAngle.PolarAngle
SupportQuantity
Positional
Parameter #25
Name
L Shell
ParameterKey
L
Description

L Shell, McIlwain Parameter, at the Time of Ionogram Frame Sync

Cadence
PT31S
RenderingHints
AxisLabel
L
ValueFormat
F7.2
ScaleMin
0.0
ScaleMax
180.0
ValidMin
0.0
ValidMax
180.0
FillValue
-1.0e+31
Support
SupportQuantity
Other
Parameter #26
Name
Spacecraft Sunlight
ParameterKey
sun
Description

Spacecraft Sunlight: 0=Out, 1=In, at the Time of Ionogram Frame Sync

Cadence
PT31S
RenderingHints
AxisLabel
sun
ValueFormat
I1
ScaleMin
1
ScaleMax
2
ValidMin
1
ValidMax
2
FillValue
-2147483648
Support
SupportQuantity
Other
Parameter #27
Name
CEP, Instrument Status
ParameterKey
CEP
Description

Cylindrical Electrostatic Probe, CEP, Instrument Status: 0=Off, 1=On

Cadence
PT31S
RenderingHints
AxisLabel
CEP
ValueFormat
I1
ScaleMin
0
ScaleMax
1
ValidMin
0
ValidMax
1
FillValue
-2147483648
Support
SupportQuantity
InstrumentMode
Parameter #28
Name
VLF, Instrument Status
ParameterKey
VLF
Description

Very Low Frequency, VLF, 0.05 to 30 kHz Receiver, Instrument Status: 0=Off, 1=On

Cadence
PT31S
RenderingHints
AxisLabel
VLF
ValueFormat
I1
ScaleMin
0
ScaleMax
1
ValidMin
0
ValidMax
1
FillValue
-2147483648
Support
SupportQuantity
InstrumentMode
Parameter #29
Name
SEA, Instrument Status
ParameterKey
SEA
Description

Spherical Electrostatic Analyzer, SEA, Instrument Status: 0=Off, 1=On

Cadence
PT31S
RenderingHints
AxisLabel
SEA
ValueFormat
I1
ScaleMin
0
ScaleMax
1
ValidMin
0
ValidMax
1
FillValue
-2147483648
Support
SupportQuantity
InstrumentMode
Parameter #30
Name
IMS1, Instrument Status
ParameterKey
IMS1
Description

Ion Mass Spectrometer 1, IMS1, Instrument Status: 0=Off, 1=On

Cadence
PT31S
RenderingHints
AxisLabel
IMS-1
ValueFormat
I1
ScaleMin
0
ScaleMax
1
ValidMin
0
ValidMax
1
FillValue
-2147483648
Support
SupportQuantity
InstrumentMode
Parameter #31
Name
IMS2, Instrument Status
ParameterKey
IMS2
Description

Ion Mass Spectrometer 2, IMS1, Instrument Status: 0=Off, 1=On

Cadence
PT31S
RenderingHints
AxisLabel
IMS-2
ValueFormat
I1
ScaleMin
0
ScaleMax
1
ValidMin
0
ValidMax
1
FillValue
-2147483648
Support
SupportQuantity
InstrumentMode
Parameter #32
Name
SPS, Instrument Status
ParameterKey
SPS
Description

Soft Particle Spectrometer, SPS, Instrument Status: 0=Off, 1=On

Cadence
PT31S
RenderingHints
AxisLabel
SPS
ValueFormat
I1
ScaleMin
0
ScaleMax
1
ValidMin
0
ValidMax
1
FillValue
-2147483648
Support
SupportQuantity
InstrumentMode
Parameter #33
Name
EPD, Instrument Status
ParameterKey
EPD
Description

Energetic Particle Detector, EPD, Instrument Status: 0=Off, 1=On

Cadence
PT31S
RenderingHints
AxisLabel
EPD
ValueFormat
I1
ScaleMin
0
ScaleMax
1
ValidMin
0
ValidMax
1
FillValue
-2147483648
Support
SupportQuantity
InstrumentMode
Parameter #34
Name
Start of Swept Frequency Portion
ParameterKey
swept_start
Description

Scan Line Number of the Start of Swept Frequency Portion of the Ionogram, this seperates the Fixed Frequency and Swept Frequency Portions of the Ionogram

Caveats
seperates the fixed and swept portions
Cadence
PT31S
RenderingHints
AxisLabel
swept_start
ValueFormat
I5
ScaleMin
0
ScaleMax
10000
ValidMin
0
ValidMax
10000
FillValue
-2147483648
Support
SupportQuantity
Other
Parameter #35
Name
Times of Ionogram Frequency Markers
ParameterKey
Time_mark
Description

Times of Ionogram Frequency Markers, Milliseconds after Frame Sync

Caveats
time of frequency markers This parameter exhibits an increasing monotonic progression.
Cadence
PT31S
Units
ms
UnitsConversion
1e-3>s
RenderingHints
ValueFormat
F10.3
ScaleMin
3000.0
ScaleMax
30000.0
Structure
Size
22
Element
Name
Element 1
Index
1
Element
Name
Element 2
Index
2
Element
Name
Element 3
Index
3
Element
Name
Element 4
Index
4
Element
Name
Element 5
Index
5
Element
Name
Element 6
Index
6
Element
Name
Element 7
Index
7
Element
Name
Element 8
Index
8
Element
Name
Element 9
Index
9
Element
Name
Element 10
Index
10
Element
Name
Element 11
Index
11
Element
Name
Element 12
Index
12
Element
Name
Element 13
Index
13
Element
Name
Element 14
Index
14
Element
Name
Element 15
Index
15
Element
Name
Element 16
Index
16
Element
Name
Element 17
Index
17
Element
Name
Element 18
Index
18
Element
Name
Element 19
Index
19
Element
Name
Element 20
Index
20
Element
Name
Element 21
Index
21
Element
Name
Element 22
Index
22
ValidMin
3000.0
ValidMax
30000.0
FillValue
-1.0e+31
Support
SupportQuantity
Temporal
Parameter #36
Name
Values of Ionogram Frequency Markers
ParameterKey
freq_mark
Description

Ionogram Frequency Marker Valuess

Cadence
PT31S
Units
MHz
UnitsConversion
1e6>Hz
RenderingHints
ValueFormat
E11.2
ScaleMin
0.1
ScaleMax
20.0
Structure
Size
22
Element
Name
Element 1
Index
1
Element
Name
Element 2
Index
2
Element
Name
Element 3
Index
3
Element
Name
Element 4
Index
4
Element
Name
Element 5
Index
5
Element
Name
Element 6
Index
6
Element
Name
Element 7
Index
7
Element
Name
Element 8
Index
8
Element
Name
Element 9
Index
9
Element
Name
Element 10
Index
10
Element
Name
Element 11
Index
11
Element
Name
Element 12
Index
12
Element
Name
Element 13
Index
13
Element
Name
Element 14
Index
14
Element
Name
Element 15
Index
15
Element
Name
Element 16
Index
16
Element
Name
Element 17
Index
17
Element
Name
Element 18
Index
18
Element
Name
Element 19
Index
19
Element
Name
Element 20
Index
20
Element
Name
Element 21
Index
21
Element
Name
Element 22
Index
22
ValidMin
0.0
ValidMax
25.0
FillValue
-1.0e+31
Support
SupportQuantity
Other
Parameter #37
Name
Number of Delay Times per Ionogram Scan Line
ParameterKey
vh_num
Description

Number of Delay Times per Ionogram Scan Line. Each Sounder Pulse Transmission is followed by a Scan of the Sounder-Receiver Video Amplitude Output Values for each Delay Time monitored after the transmitted Pulse. These Scans are called Scan Lines. There are two Types of ISIS 1 Binary Ionogram Files, one designated as Full and the other designated as Average. The Full File has 1340 Delay Times, one every 0.025 ms. The Average Files are derived from the Full Files by averaging the Amplitude Values in four Delay Time Bins. Thus, the Average Binary Files contain 335 Time Delay Bins within each Scan Line. The CDF Files were made from these Average Binary Files.

Cadence
PT31S
RenderingHints
AxisLabel
N_vh
ValueFormat
I3
ScaleMin
0
ScaleMax
335
ValidMin
0
ValidMax
350
FillValue
-2147483648
Support
SupportQuantity
Other
Parameter #38
Name
Number of Ionogram Scan Line Frequencies
ParameterKey
f_num
Description

Number of Ionogram Scan Line Frequencie Steps. Ionogram Files can be of different Lengths. In some the Swept Frequency Portion covers the Range from 0.1 Mhz to 10 MHz, in others from 0.1 Mhz to 20 MHz. Also, the proper Start of each Ionogram File, marked by a Frame Sync Pulse, was not always detected during the Analog to Digital, A/D, Conversion. In such cases, a Frame Sync was inserted to limit the File Size. Thus the Number of Sounder-Receiver Video Amplitude versus Delay Time Scan Lines per Ionogram can vary.

Cadence
PT31S
RenderingHints
AxisLabel
N_f
ValueFormat
I6
ScaleMin
0
ScaleMax
4000
ValidMin
0
ValidMax
4000
FillValue
-2147483648
Support
SupportQuantity
Other
Parameter #39
Name
Delay Time Values
ParameterKey
delay_time
Description

Delay Time Values used in each Scan Line

Cadence
PT31S
Units
ms
UnitsConversion
1e-3>s
RenderingHints
ValueFormat
F9.2
ScaleType
LinearScale
Structure
Size
335
FillValue
-1.0e+31
Support
SupportQuantity
Temporal
Parameter #40
Name
Apparent Range Values
ParameterKey
v_height
Description

Virtual Height Values corresponding to Delay Times used in each Scan Line

Cadence
PT31S
Units
km
UnitsConversion
1e3>m
RenderingHints
ValueFormat
F9.2
ScaleType
LinearScale
Structure
Size
335
FillValue
-1.0e+31
Support
Qualifier
Magnitude
SupportQuantity
Other
Parameter #41
Name
Epoch Time
ParameterKey
Epoch
Description

Epoch Time

Caveats
This parameter exhibits an increasing monotonic progression.
Cadence
PT31S
Units
ms
UnitsConversion
1e-3>s
RenderingHints
AxisLabel
Epoch
ScaleMin
6.2135661819904e+13
ScaleMax
6.3113882619904e+13
ValidMin
01-Jan-1969 00:00:00.000
ValidMax
01-Jan-2000 00:00:00.000
FillValue
-1.0e+31
Support
SupportQuantity
Temporal
Parameter #42
Name
Interpolated Frequencies
Set
Time series defined by using: EPOCH
ParameterKey
freq
Description

Interpolated Fixed and Swept Frequencies for each Scan Line, in the Swept Frequency Portion of the Ionogram they correspond to interpolated Values between the Frequency Markers

Caveats
This variable could be used as x-axis on amplitude spectrograms if fixed part is subtracted.
Cadence
PT31S
Units
MHz
UnitsConversion
1e6>Hz
RenderingHints
DisplayType
TimeSeries
AxisLabel
Frequency
ValueFormat
E11.2
ScaleMin
0.1
ScaleMax
25.0
ValidMin
0.1
ValidMax
25.0
FillValue
-1.0e+31
Wave
WaveType
PlasmaWaves
Qualifier
Scalar
WaveQuantity
Frequency
Parameter #43
Name
Height
Set
Time series defined by using: EPOCH
ParameterKey
height
Description

Satellite Altitude

Caveats
Virtual variable. This parameter is virtual. It is calculated by calling the function HEIGHT_ISIS with the following input parameters: geo_coord.
Cadence
PT31S
Units
km
UnitsConversion
1e3>m
RenderingHints
DisplayType
TimeSeries
AxisLabel
Satellite Altitude
ValueFormat
F6.1
ScaleMin
0.0
ScaleMax
4000.0
ValidMin
0.0
ValidMax
4000.0
FillValue
-1.0e+31
Support
Qualifier
Magnitude
SupportQuantity
Positional