Version:2.2.9

NumericalData

ResourceHeader

ResourceName

Wind Plasma and Radio Waves (WAVES) Time Domain Sampler (TDS) Dust Impact, Level 3, 1 s Data

ReleaseDate

2019-08-05 15:03:35Z

Description

Wind WAVES Time Domain Sampler, TDS, Dust Data File References: 1) Bougeret, J.-L., et al., WAVES: The Radio and Plasma Wave Investigation on the Wind Spacecraft, Space Sci. Rev., 71, 231-263, 1995, doi:10.1007/BF00751331. 2) Malaspina, D.M., M. Horanyi, A. Zaslavsky, K. Goetz, L.B. Wilson III, and K. Kersten, Interplanetary and Interstellar Dust observed by the Wind/WAVES Electric Field Instrument, Geophys. Res. Lett., 41, 266-272, 2014, doi:10.1002/2013GL058786. 3) Malaspina, D.M., and L.B. Wilson III, A Database of Interplanetary and Interstellar Dust Detected by the Wind Spacecraft, J. Geophys. Res., 121, 9369–9377, 2016, doi:10.1002/2016JA023209.

Acknowledgement

D.M. Malaspina, L.B. Wilson III, R.J. MacDowall, We would like to thank the Wind/WAVES team, especially Keith Goetz, Paul J. Kellogg, Kris Kersten, and Josh Lynch for their Support with Data Retrieval and Calibration. Please Cite or Reference the Wind WAVES Paper by J.-L. Bougeret et al., 1995 in Space Sci. Rev. and Work by D.M. Malaspina et al., 2014 in Geophys. Res. Lett., doi:10.1002/2013GL058786. We would also appreciate a Reference to the Wind Dust Impact Database Paper: D.M. Malaspina et al., 2016, in J. Geophys. Res., doi:10.1002/2016JA023209.

Contacts

	Role	Person
1.	PrincipalInvestigator	spase://SMWG/Person/David.M.Malaspina
2.	PrincipalInvestigator	spase://SMWG/Person/Lynn.B.Wilson.III
3.	PrincipalInvestigator	spase://SMWG/Person/Robert.J.MacDowall
4.	MetadataContact	spase://SMWG/Person/Robert.E.McGuire
5.	MetadataContact	spase://SMWG/Person/Lee.Frost.Bargatze

InformationURL

Name

The Wind Dust Database

URL

https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2016JA023209

Description

The Wind Database of Interplanetary and Interstellar Dust Events, JGR Article

AccessInformation

RepositoryID

spase://SMWG/Repository/NASA/GSFC/SPDF

Availability

Online

AccessRights

Open

AccessURL

Name

FTP access to files at SPDF

URL

ftps://spdf.gsfc.nasa.gov/pub/data/wind/waves/dust_impact_l3/

Description

Access to Data in CDF Format via ftp from SPDF

AccessURL

Name

HTTP access to files at SPDF

URL

https://spdf.gsfc.nasa.gov/pub/data/wind/waves/dust_impact_l3/

Description

Access to Data in CDF Format via http from SPDF

AccessURL

Name

CDAWeb

URL

https://cdaweb.sci.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=WI_L3-DUSTIMPACT_WAVES&index=sp_phys

ProductKey

WI_L3-DUSTIMPACT_WAVES

Description

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

Format

CDF

Encoding

None

Acknowledgement

D.M. Malaspina, L.B. Wilson III, R.J. MacDowall, We would like to thank the Wind/WAVES team, especially Keith Goetz, Paul J. Kellogg, Kris Kersten, and Josh Lynch for their Support with Data Retrieval and Calibration. Please Cite or Reference the Wind WAVES Paper by J.-L. Bougeret et al., 1995 in Space Sci. Rev. and Work by D.M. Malaspina et al., 2014 in Geophys. Res. Lett., doi:10.1002/2013GL058786. We would also appreciate a Reference to the Wind Dust Impact Database Paper: D.M. Malaspina et al., 2016, in J. Geophys. Res., doi:10.1002/2016JA023209.. Please acknowledge the data providers and CDAWeb when using these data.

ProcessingLevel

Calibrated

MeasurementType

ElectricField

TemporalDescription

TimeSpan

StartDate

1995-01-01 00:00:00.000

StopDate

2016-01-01 23:59:59.999

Cadence

PT1S

ObservedRegion

Heliosphere

ObservedRegion

Heliosphere.NearEarth

ObservedRegion

Heliosphere.Inner

Parameter #1

Name

Epoch, TT2000, Start of TDS Event

ParameterKey

EPOCH

Description

Epoch, Terrestrial Time 2000, TT2000, Start of Time Domain Sampler, TDS, Event

Caveats

Time at Beginning of TDS Event as measured by the Minor Frame Clock. Thus, the Time Stamps have not been adjusted to correct for the Inherent Positive Definite Rounding Errors due to the Low Resolution of the Minor Frame Clock Times. This will be implemented in Future Versions when the Entire TDS Dataset is released on CDAWeb.

Cadence

PT1S

Units

ns

UnitsConversion

1e-9>s

RenderingHints

AxisLabel

Epoch

ValueFormat

I22

ScaleType

LinearScale

ValidMin

1994-11-01T23:59:59.999999999

ValidMax

2044-11-01T23:59:59.999999999

FillValue

9999-12-31T23:59:59.999999999

Support

SupportQuantity

Temporal

Parameter #2

Name

TDS Event Number

Set

Time series defined by using: EPOCH

ParameterKey

TDS_Event_Number

Description

Time Domain Sampler, TDS, Event Number, Identifier for each Dust Impact

Caveats

The TDS Event Number is a Unique Long Integer that identifies one Event from another. The Counter rolls over, so the Date and Event Number are required for Waveform Identification.

Cadence

PT1S

RenderingHints

ValueFormat

I8

ValidMin

0

ValidMax

99999999

FillValue

-1

Support

SupportQuantity

Other

Parameter #3

Name

TDS Event Duration

Set

Time series defined by using: EPOCH

ParameterKey

TDS_Event_Duration

Description

Time Domain Sampler, TDS, Event Duration

Caveats

The Total Duration of each TDSF Event in Seconds. A single TDSF Event is defined as a Snapshot of two Electric Field Components with the same Event Number occurring on the Same Date. Most TDSF Events were sampled at 120000 Samples per Second, thus will have Durations of roughly 17 ms. However, the longest Duration Events can last upwards of about 1 s.

Cadence

PT1S

Units

s

RenderingHints

ValueFormat

E14.6

ValidMin

0.015

ValidMax

1.3

FillValue

-1.0e+31

Support

Qualifier

Scalar

SupportQuantity

Temporal

Parameter #4

Name

Spacecraft Spin Rate

Set

Time series defined by using: EPOCH

ParameterKey

Wind_Spin_Rate

Description

Spacecraft Spin Rate

Caveats

The Spacecraft, SC, Spin Rate in '/s was determined by using the known Event Duration and Angle subtended during each TDS Event. This Value is accurate to much less than 1', where the Uncertainties arise from the Onboard Sample Rate Clock of the TDS Receiver and Sun Pulse Detector Time Accuracy. The Spin Period in Seconds was then determined by using 360' divided by the Spin Rate Value. Both Values assume that the Spin Rate and Spin Period are constant during the TDS Event, which should be an accurate Assumption for nearly all Events.

Cadence

PT1S

Units

°/s

UnitsConversion

0.0174532925>rad/s

RenderingHints

DisplayType

TimeSeries

AxisLabel

Spin Rate

ValueFormat

E14.6

ScaleType

LinearScale

ValidMin

0.0

ValidMax

360.0

FillValue

-1.0e+31

Support

Qualifier

Scalar

SupportQuantity

Other

Parameter #5

Name

Spacecraft Spin Period

Set

Time series defined by using: EPOCH

ParameterKey

Wind_Spin_Period

Description

Spacecraft Spin Period

Caveats

The Spacecraft, SC, Spin Rate in '/s was determined by using the known Event Duration and Angle subtended during each TDS Event. This Value is accurate to much less than 1', where the Uncertainties arise from the Onboard Sample Rate Clock of the TDS Receiver and Sun Pulse Detector Time Accuracy. The Spin Period in Seconds was then determined by using 360' divided by the Spin Rate Value. Both Values assume that the Spin Rate and Spin Period are constant during the TDS Event, which should be an accurate Assumption for nearly all Events.

Cadence

PT1S

Units

s

RenderingHints

DisplayType

TimeSeries

AxisLabel

Spin Period

ValueFormat

E14.6

ScaleType

LinearScale

ValidMin

0.0

ValidMax

5.0

FillValue

-1.0e+31

Support

Qualifier

Scalar

SupportQuantity

Temporal

Parameter #6

Name

Peak Amplitude, Channel 1

Set

Time series defined by using: EPOCH

ParameterKey

Ch01___Peak_amplitude

Description

Peak Amplitude, Channel 1

Caveats

The Peak Amplitude of the Electric Field Component from the Dust Impact. This is the Peak Amplitude measured during a TDSF Event on both Antenna. This is a Signed Value, that is, Plus, +, or Minus, -. The X-Antenna was first cut on August 3, 2000. It was cut again on September 24, 2002. Currently, the effective Antenna Lengths used are 41.1 m, 3.79 m, and 2.17 m for the X-Antenna, Y-Antenna, and Z-Antenna, respectively, for all Dust Impacts. We have removed these Antenna Length Dependencies, which is why the Amplitude Units are in mV.

Cadence

PT1S

Units

mV

UnitsConversion

1e-3>V

RenderingHints

DisplayType

TimeSeries

AxisLabel

Ch 1 Peak Amp.

ValueFormat

E14.6

ScaleType

LinearScale

ValidMin

-20000.0

ValidMax

20000.0

FillValue

-1.0e+31

Wave

WaveType

PlasmaWaves

Qualifier

Peak

Qualifier

Scalar

WaveQuantity

Intensity

Parameter #7

Name

Cross-Correlation Value, Channel 1

Set

Time series defined by using: EPOCH

ParameterKey

Ch01___cc_value

Description

Cross-Correlation Value, Channel 1

Caveats

The Cross-Correlation Value between the Channel 1 Waveform and the Normalized Median Waveform of a given Morphological Type, e.g., See Malaspina and Wilson, (2016) for Morphological Type Definitions.

Cadence

PT1S

RenderingHints

DisplayType

TimeSeries

AxisLabel

Ch 1 Cross-Corr. Val.

ValueFormat

E14.6

ScaleType

LinearScale

ValidMin

0.0

ValidMax

1.0

FillValue

-1.0e+31

Support

Qualifier

Scalar

SupportQuantity

Other

Parameter #8

Name

Cross-Correlation Threshold Value, Channel 1

Set

Time series defined by using: EPOCH

ParameterKey

Ch01___cc_threshold

Description

Cross-Correlation Threshold Value, Channel 1

Caveats

The Cross-Correlation Threshold Value for the Channel 1 Waveform used. The Overall Cross-Correlation Threshold is 0.8 but Morphological Types C, D, and M are required to exceed 0.9.

Cadence

PT1S

RenderingHints

DisplayType

TimeSeries

AxisLabel

Ch 1 Cross-Corr. Thrsh.

ValueFormat

E14.6

ScaleType

LinearScale

ValidMin

0.0

ValidMax

1.0

FillValue

-1.0e+31

Support

Qualifier

Scalar

SupportQuantity

Other

Parameter #9

Name

Event Selection Threshold Amplitude, Channel 1

Set

Time series defined by using: EPOCH

ParameterKey

MinCh1_threshold

Description

Event Selection Threshold Amplitude, Channel 1

Caveats

The Minimum Channel 1 Absolute Amplitude required for Event Selection. The X-Antenna was first cut on August 3, 2000. It was cut again on September 24, 2002. Currently, the Effective Antenna Lengths used are 41.1 m, 3.79 m, and 2.17 m for the X-Antenna, Y-Antenna, and Z-Antenna, respectively, for all Dust Impacts. We have removed these Antenna Length Dependencies, which is why the Amplitude Units are in mV.

Cadence

PT1S

Units

mV

UnitsConversion

1e-3>V

RenderingHints

DisplayType

TimeSeries

AxisLabel

Ch 1 Min. Thrsh.

ValueFormat

E14.6

ScaleType

LinearScale

ValidMin

0.0

ValidMax

100.0

FillValue

-1.0e+31

Wave

WaveType

PlasmaWaves

Qualifier

Scalar

WaveQuantity

Intensity

Parameter #10

Name

Average Clockwise Angle of the Closest Ex Antenna to the Dust Impact from the Earth-Sun Line

Set

Time series defined by using: EPOCH

ParameterKey

Ch1ImpAnt_E_S_Angle

Description

Average Clockwise Angle of the Closest Ex Antenna to the Dust Impact on the Spacecraft Bus from Earth-Sun Line, roughly GSE +X, Channel 1

Caveats

The Angle accounts for the XY-GSE Displacement of Wind but assumes Earth remains at exactly 1 AU always. The Error introduced by not including the Change of the Earth's Radial Position throughout its annual Orbit is less than ~0.017°. The Error introduced by not including the Change of the Spacecraft's Out-of-Ecliptic Displacement is less than ~0.0018°. The Spacecraft, SC, Spin Axis is aligned within ~0.8° of the South Ecliptic Pole. This varies annually due to the Differences in Torque applied to the SC Bus by Solar Radiation. The Angle can be as low as 0.1°. We define Clockwise (CW) Angles as being less than zero for CW Rotations to remain consistent with Euler Angle Notation. We define CW as viewed from the North Ecliptic Pole looking down upon the XY-GSE Plane. All Angles herein vary from 0° to 360°, Absolute Values, thus a positive Counter-Clockwise Angle corresponds to a Clockwise Angle plus 360° that is greater than 0 °. The Impact Antenna Angle depends upon the closest Impact Antenna, defined by the CDF Variables Ch01___ImpactAntenna and Ch02___ImpactAntenna. An Example Image illustrating the various Angles within these CDF Files can be found in the Malaspina and Wilson, 2016.

Cadence

PT1S

Units

°

UnitsConversion

0.0174532925>rad

CoordinateSystem

CoordinateRepresentation

Spherical

CoordinateSystemName

GSE

RenderingHints

DisplayType

TimeSeries

AxisLabel

Ex Imp. Ant. CW Earth-Sun Angle

ValueFormat

E14.6

ScaleType

LinearScale

ValidMin

-360.0

ValidMax

360.0

FillValue

-1.0e+31

Support

Qualifier

DirectionAngle.AzimuthAngle

SupportQuantity

Positional

Parameter #11

Name

Peak Amplitude, Channel 2

Set

Time series defined by using: EPOCH

ParameterKey

Ch02___Peak_amplitude

Description

Peak Amplitude, Channel 2

Caveats

The Peak Amplitude of the Electric Field Component from the Dust Impact. This is the Peak Amplitude measured during a TDSF Event on both Antenna. This is a Signed Value, that is, Plus, +, or Minus, -. The X-Antenna was first cut on August 3, 2000. It was cut again on September 24, 2002. Currently, the effective Antenna Lengths used are 41.1 m, 3.79 m, and 2.17 m for the X-Antenna, Y-Antenna, and Z-Antenna, respectively, for all Dust Impacts. We have removed these Antenna Length Dependencies, which is why the Amplitude Units are in mV.

Cadence

PT1S

Units

mV

UnitsConversion

1e-3>V

RenderingHints

DisplayType

TimeSeries

AxisLabel

Ch 2 Peak Amp.

ValueFormat

E14.6

ScaleType

LinearScale

ValidMin

-20000.0

ValidMax

20000.0

FillValue

-1.0e+31

Wave

WaveType

PlasmaWaves

Qualifier

Peak

Qualifier

Scalar

WaveQuantity

Intensity

Parameter #12

Name

Cross-Correlation Value, Channel 2

Set

Time series defined by using: EPOCH

ParameterKey

Ch02___cc_value

Description

Cross-Correlation Value, Channel 2

Caveats

The Cross-Correlation Value between the Channel 2 Waveform and the Normalized Median Waveform of a given Morphological Type, e.g., See Malaspina and Wilson, (2016) for Morphological Type Definitions.

Cadence

PT1S

RenderingHints

DisplayType

TimeSeries

AxisLabel

Ch 2 Cross-Corr. Val.

ValueFormat

E14.6

ScaleType

LinearScale

ValidMin

0.0

ValidMax

1.0

FillValue

-1.0e+31

Support

Qualifier

Scalar

SupportQuantity

Other

Parameter #13

Name

Cross-Correlation Threshold Value, Channel 2

Set

Time series defined by using: EPOCH

ParameterKey

Ch02___cc_threshold

Description

Cross-Correlation Threshold Value, Channel 2

Caveats

The Cross-Correlation Threshold Value for the Channel 2 Waveform used. The Overall Cross-Correlation Threshold is 0.8 but Morphological Types C, D, and M are required to exceed 0.9.

Cadence

PT1S

RenderingHints

DisplayType

TimeSeries

AxisLabel

Ch 2 Cross-Corr. Thrsh.

ValueFormat

E14.6

ScaleType

LinearScale

ValidMin

0.0

ValidMax

1.0

FillValue

-1.0e+31

Support

Qualifier

Scalar

SupportQuantity

Other

Parameter #14

Name

Event Selection Threshold Amplitude, Channel 2

Set

Time series defined by using: EPOCH

ParameterKey

MinCh2_threshold

Description

Event Selection Threshold Amplitude, Channel 2

Caveats

The Minimum Channel 2 Absolute Amplitude required for Event Selection. The X-Antenna was first cut on August 3, 2000. It was cut again on September 24, 2002. Currently, the Effective Antenna Lengths used are 41.1 m, 3.79 m, and 2.17 m for the X-Antenna, Y-Antenna, and Z-Antenna, respectively, for all Dust Impacts. We have removed these Antenna Length Dependencies, which is why the Amplitude Units are in mV.

Cadence

PT1S

Units

mV

UnitsConversion

1e-3>V

RenderingHints

DisplayType

TimeSeries

AxisLabel

Ch 2 Min. Thrsh.

ValueFormat

E14.6

ScaleType

LinearScale

ValidMin

0.0

ValidMax

100.0

FillValue

-1.0e+31

Wave

WaveType

PlasmaWaves

Qualifier

Scalar

WaveQuantity

Intensity

Parameter #15

Name

Average Clockwise Angle of the Closest Ey Antenna to the Dust Impact from the Earth-Sun Line

Set

Time series defined by using: EPOCH

ParameterKey

Ch2ImpAnt_E_S_Angle

Description

Average Clockwise Angle of the Closest Ey Antenna to the Dust Impact on the Spacecraft Bus from the Earth-Sun Line, roughly GSE +X, Channel 2

Caveats

The Angle accounts for the XY-GSE Displacement of Wind but assumes Earth remains at exactly 1 AU always. The Error introduced by not including the Change of the Earth's Radial Position throughout its annual Orbit is less than ~0.017°. The Error introduced by not including the Change of the Spacecraft's Out-of-Ecliptic Displacement is less than ~0.0018°. The Spacecraft, SC, Spin Axis is aligned within ~0.8° of the South Ecliptic Pole. This varies annually due to the Differences in Torque applied to the SC Bus by Solar Radiation. The Angle can be as low as 0.1°. We define Clockwise (CW) Angles as being less than zero for CW Rotations to remain consistent with Euler Angle Notation. We define CW as viewed from the North Ecliptic Pole looking down upon the XY-GSE Plane. All Angles herein vary from 0° to 360°, Absolute Values, thus a positive Counter-Clockwise Angle corresponds to a Clockwise Angle plus 360° that is greater than 0 °. The Impact Antenna Angle depends upon the closest Impact Antenna, defined by the CDF Variables Ch01___ImpactAntenna and Ch02___ImpactAntenna. An Example Image illustrating the various Angles within these CDF Files can be found in the Malaspina and Wilson, 2016.

Cadence

PT1S

Units

°

UnitsConversion

0.0174532925>rad

CoordinateSystem

CoordinateRepresentation

Spherical

CoordinateSystemName

GSE

RenderingHints

DisplayType

TimeSeries

AxisLabel

Ey Imp. Ant. CW Earth-Sun Angle

ValueFormat

E14.6

ScaleType

LinearScale

ValidMin

-360.0

ValidMax

360.0

FillValue

-1.0e+31

Support

Qualifier

Average

Qualifier

DirectionAngle.AzimuthAngle

SupportQuantity

Positional

Parameter #16

Name

Average Clockwise Angle of +Ex Antenna from the Spacecraft-Sun Line

Set

Time series defined by using: EPOCH

ParameterKey

Pos_Ax_SCS_Angle

Description

Average Clockwise Angle of +Ex Antenna from the Spacecraft-Sun Line

Caveats

The Angle accounts for the XY-GSE Displacement of Wind but assumes Earth remains at exactly 1 AU always. The Error introduced by not including the Change of the Earth's Radial Position throughout its annual Orbit is less than ~0.017°. The Error introduced by not including the Change of the Spacecraft's Out-of-Ecliptic Displacement is less than ~0.0018°. The Spacecraft, SC, Spin Axis is aligned within ~0.8° of the South Ecliptic Pole. This varies annually due to the Differences in Torque applied to the SC Bus by Solar Radiation. The Angle can be as low as 0.1°. We define Clockwise (CW) Angles as being less than zero for CW Rotations to remain consistent with Euler Angle Notation. We define CW as viewed from the North Ecliptic Pole looking down upon the XY-GSE Plane. All Angles herein vary from 0° to 360°, Absolute Values, thus a positive Counter-Clockwise Angle corresponds to a Clockwise Angle plus 360° that is greater than 0 °. The Impact Antenna Angle depends upon the closest Impact Antenna, defined by the CDF Variables Ch01___ImpactAntenna and Ch02___ImpactAntenna. An Example Image illustrating the various Angles within these CDF Files can be found in the Malaspina and Wilson, 2016.

Cadence

PT1S

Units

°

UnitsConversion

0.0174532925>rad

CoordinateSystem

CoordinateRepresentation

Spherical

CoordinateSystemName

HG

RenderingHints

DisplayType

TimeSeries

AxisLabel

+Ex CW SC-Sun Angle

ValueFormat

E14.6

ScaleType

LinearScale

ValidMin

-360.0

ValidMax

360.0

FillValue

-1.0e+31

Support

Qualifier

Average

Qualifier

DirectionAngle.AzimuthAngle

SupportQuantity

Positional

Parameter #17

Name

Average Clockwise Angle of +Ex Antenna from the Earth-Sun Line

Set

Time series defined by using: EPOCH

ParameterKey

Pos_Ax_E_S_Angle

Description

Average Clockwise Angle of +Ex Antenna from the Earth-Sun Line, roughly GSE +X

Caveats

The Angle accounts for the XY-GSE Displacement of Wind but assumes Earth remains at exactly 1 AU always. The Error introduced by not including the Change of the Earth's Radial Position throughout its annual Orbit is less than ~0.017°. The Error introduced by not including the Change of the Spacecraft's Out-of-Ecliptic Displacement is less than ~0.0018°. The Spacecraft, SC, Spin Axis is aligned within ~0.8° of the South Ecliptic Pole. This varies annually due to the Differences in Torque applied to the SC Bus by Solar Radiation. The Angle can be as low as 0.1°. We define Clockwise (CW) Angles as being less than zero for CW Rotations to remain consistent with Euler Angle Notation. We define CW as viewed from the North Ecliptic Pole looking down upon the XY-GSE Plane. All Angles herein vary from 0° to 360°, Absolute Values, thus a positive Counter-Clockwise Angle corresponds to a Clockwise Angle plus 360° that is greater than 0 °. The Impact Antenna Angle depends upon the closest Impact Antenna, defined by the CDF Variables Ch01___ImpactAntenna and Ch02___ImpactAntenna. An Example Image illustrating the various Angles within these CDF Files can be found in the Malaspina and Wilson, 2016.

Cadence

PT1S

Units

°

UnitsConversion

0.0174532925>rad

CoordinateSystem

CoordinateRepresentation

Spherical

CoordinateSystemName

GSE

RenderingHints

DisplayType

TimeSeries

AxisLabel

+Ex CW Earth-Sun Angle

ValueFormat

E14.6

ScaleType

LinearScale

ValidMin

-360.0

ValidMax

360.0

FillValue

-1.0e+31

Support

Qualifier

Average

Qualifier

DirectionAngle.AzimuthAngle

SupportQuantity

Positional

Parameter #18

Name

Average Clockwise Angle of +Ey Antenna from the Earth-Sun Line

Set

Time series defined by using: EPOCH

ParameterKey

Pos_Ay_E_S_Angle

Description

Average Clockwise Angle of +Ey Antenna from the Earth-Sun Line, roughly GSE +X

Caveats

The Angle accounts for the XY-GSE Displacement of Wind but assumes Earth remains at exactly 1 AU always. The Error introduced by not including the Change of the Earth's Radial Position throughout its annual Orbit is less than ~0.017°. The Error introduced by not including the Change of the Spacecraft's Out-of-Ecliptic Displacement is less than ~0.0018°. The Spacecraft, SC, Spin Axis is aligned within ~0.8° of the South Ecliptic Pole. This varies annually due to the Differences in Torque applied to the SC Bus by Solar Radiation. The Angle can be as low as 0.1°. We define Clockwise (CW) Angles as being less than zero for CW Rotations to remain consistent with Euler Angle Notation. We define CW as viewed from the North Ecliptic Pole looking down upon the XY-GSE Plane. All Angles herein vary from 0° to 360°, Absolute Values, thus a positive Counter-Clockwise Angle corresponds to a Clockwise Angle plus 360° that is greater than 0 °. The Impact Antenna Angle depends upon the closest Impact Antenna, defined by the CDF Variables Ch01___ImpactAntenna and Ch02___ImpactAntenna. An Example Image illustrating the various Angles within these CDF Files can be found in the Malaspina and Wilson, 2016.

Cadence

PT1S

Units

°

UnitsConversion

0.0174532925>rad

CoordinateSystem

CoordinateRepresentation

Spherical

CoordinateSystemName

GSE

RenderingHints

DisplayType

TimeSeries

AxisLabel

+Ey CW Earth-Sun Angle

ValueFormat

E14.6

ScaleType

LinearScale

ValidMin

-360.0

ValidMax

360.0

FillValue

-1.0e+31

Support

Qualifier

Average

Qualifier

DirectionAngle.AzimuthAngle

SupportQuantity

Positional

Parameter #19

Name

Average Clockwise Angle of +Ex Antenna from the Earth-Sun Line, Uncertainty

Set

Time series defined by using: EPOCH

ParameterKey

Pos_Ax_E_S_Delta_Angle

Description

Average Clockwise Angle of +Ex Antenna from the Earth-Sun Line, roughly GSE +X, Uncertainty

Caveats

The Angle accounts for the XY-GSE Displacement of Wind but assumes Earth remains at exactly 1 AU always. The Error introduced by not including the Change of the Earth's Radial Position throughout its annual Orbit is less than ~0.017°. The Error introduced by not including the Change of the Spacecraft's Out-of-Ecliptic Displacement is less than ~0.0018°. The Spacecraft, SC, Spin Axis is aligned within ~0.8° of the South Ecliptic Pole. This varies annually due to the Differences in Torque applied to the SC Bus by Solar Radiation. The Angle can be as low as 0.1°. We define Clockwise (CW) Angles as being less than zero for CW Rotations to remain consistent with Euler Angle Notation. We define CW as viewed from the North Ecliptic Pole looking down upon the XY-GSE Plane. All Angles herein vary from 0° to 360°, Absolute Values, thus a positive Counter-Clockwise Angle corresponds to a Clockwise Angle plus 360° that is greater than 0 °. The Impact Antenna Angle depends upon the closest Impact Antenna, defined by the CDF Variables Ch01___ImpactAntenna and Ch02___ImpactAntenna. An Example Image illustrating the various Angles within these CDF Files can be found in the Malaspina and Wilson, 2016.

Cadence

PT1S

Units

°

UnitsConversion

0.0174532925>rad

CoordinateSystem

CoordinateRepresentation

Spherical

CoordinateSystemName

GSE

RenderingHints

DisplayType

TimeSeries

AxisLabel

Delta Pos_Ax_E_S_Angle

ValueFormat

E14.6

ScaleType

LinearScale

ValidMin

0.0

ValidMax

360.0

FillValue

-1.0e+31

Support

Qualifier

Average

Qualifier

DirectionAngle.AzimuthAngle

Qualifier

Uncertainty

SupportQuantity

Positional

Parameter #20

Name

Average Clockwise Angle of the E[x,y] Impact Antenna from the Earth-Sun Angle, Uncertainty

Set

Time series defined by using: EPOCH

ParameterKey

ImpAnt_E_S_Delta_Angle

Description

Average Clockwise Angle of the E[x,y] Impact Antenna from the Earth-Sun Angle, roughly GSE +X, Uncertainty

Caveats

The Impact Angle Uncertainties are mostly controlled by the Quadrant or Hemisphere in which the Dust Impact occurred. This is true for the Ch1ImpAnt_E_S_Angle and Ch2ImpAnt_E_S_Angle. This is roughly ±45°, i.e., Quadrant, for all Events. For the other Sun Angles, that is, Pos_Ax_SCS_Angle, Pos_Ax_E_S_Angle, and Pos_Ay_E_S_Angle, the Uncertainty is controlled by the Spin Rate of the Spacecraft as determined by Event Duration and Angle subtended during an Event multiplied by the TDSF Event Duration plus the DPU Clock Latency Uncertainty, i.e., about 10.6 ms. Thus, this Uncertainty is currently less than 13° for the Worst Case Scenario with Fastest Spin Rate and Slowest Sampling Rate. In the Best Case Scenario and for most Events, the Uncertainties drop to ~3°.

Cadence

PT1S

Units

°

UnitsConversion

0.0174532925>rad

CoordinateSystem

CoordinateRepresentation

Spherical

CoordinateSystemName

GSE

RenderingHints

DisplayType

TimeSeries

AxisLabel

Delta ImpAnt_E_S_Angle

ValueFormat

E14.6

ScaleType

LinearScale

ValidMin

0.0

ValidMax

360.0

FillValue

-1.0e+31

Support

Qualifier

Average

Qualifier

DirectionAngle.AzimuthAngle

Qualifier

Uncertainty

SupportQuantity

Positional