add unit pT2 Hz-1 for Schumann Resonances (Measurement unit Table 1-02)

[amilan17]

Initial request

Align the units in OSCAR Requirements and WIGOS units.

Add unit pT2 Hz-1 for Schumann Resonances (Measurement unit Table 1-02) as used in the Schumann Resonances variable at https://space.oscar.wmo.int/variables/view/schumann_resonances

Amendment details

Add the following to the unit table:

Notation: pT2.Hz-1
Name: picoTesla squared per Hertz
Description: SI derived unit for magnetic power spectrum commonly used to describe Schumann Resonances. SI base unit equivalent: 1E-12 A m-1 s.

Notation: nT2.Hz-1
Name: nanoTesla squared per Hertz
Description: SI derived unit for magnetic power spectrum commonly used to describe Schumann Resonances. SI base unit equivalent: 1E-9 A m-1 s.

Requestor(s)

GCOS, OSCAR Requirements, @kpremec

Stakeholder(s)

Enter list of stakeholder(s).

Applications or Systems

• OSCAR/Surface
• OSCAR/requirements
• Radar/DB
• OceanOPS
• WHOS
• WDQMS
• GBON Compliance Monitor
• Other

Expected impact of change

None

Collaborators

No response

References

No response

Comments

related to this issue: #548

Publication(s)

Manual on Codes (WMO-No. 306), Volume I.3, WMO Codes Registry - WMDR

Validation

No response

[amilan17]

https://github.com/wmo-im/tt-wigosmd/wiki/Meeting.2024.10.24 notes:
@gaochen-larc taking responsiblity

[gaochen-larc]

Notation: pT2.Hz-1
Name: picoTesla squared per Hertz
Description: SI derived unit for magnetic power spectrum commonly used to describe Schumann Resonances. SI base unit equivalent: 1E-12 A m-1 s.

[amilan17]

https://github.com/wmo-im/tt-wigosmd/wiki/Meeting.2024.11.21 notes:
Gao added a suggestion above;

[amilan17]

https://github.com/wmo-im/tt-wigosmd/wiki/Meeting.2024.12.13 notes:
@gaochen-larc update "Amendment details" section in issue above with notation and description.

[amilan17]

@gaochen-larc have you updated this proposal?

[gaochen-larc]

@gaochen-larc have you updated this proposal?

I put the proposal in amendment details. should I put it in a table?

[amilan17]

Thanks! I think you did it correctly. Will you have time to update the branch?
https://github.com/wmo-im/wmds/tree/554-add-unit-pt2-hz-1-for-schumann-resonances-measurement-unit-table-1-02

[gaochen-larc]

Just add these two units to Table 1-02. Hope I did correctly

[amilan17]

https://github.com/wmo-im/tt-wigosmd/wiki/Meeting.2025.01.16 notes:

• Gao updated the branch, note that the units should be on different lines so they are in alphabetical order
• @joergklausen review unit values

[joergklausen]

@gaochen-larc @amilan17 I have the feeling that these units are actually not addressing the issue. From my reading (and I am not an expert), there is the magnetic and the electrical dimension of Schumann resonances. I have found more information (including from Wikipedia) about the electrical dimension. For that, the units should be microvolts per meter. Why did you propose a unit for magnetic fields?

[gaochen-larc]

@gaochen-larc @amilan17 I have the feeling that these units are actually not addressing the issue. From my reading (and I am not an expert), there is the magnetic and the electrical dimension of Schumann resonances. I have found more information (including from Wikipedia) about the electrical dimension. For that, the units should be microvolts per meter. Why did you propose a unit for magnetic fields?

I proposed these units per initial request. I have also seen these units used in a few papers on Schumann resonances.

[amilan17]

Why did you propose a unit for magnetic fields?
@joergklausen - the original request was to align the units in OSCAR Requirements and WIGOS units. I updated the issue summary.
https://space.oscar.wmo.int/variables/view/schumann_resonances

[gaochen-larc]

I guess we just need to incorporate the oscar unit into the WIGOS code. Should we use use the OSCAR definition?

[amilan17]

https://github.com/wmo-im/tt-wigosmd/wiki/Meeting.2025.02.20 notes:
Use the definitions and units that Gao provided.