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Table 2.
Notations used in the paper and their meanings.
| Notations | Meaning |
|---|---|
| DPD | Debrecen Photoheliographic Data |
| DPDall | Debrecen Photoheliographic Data of all sunspot groups |
| DPDmax | Debrecen Photoheliographic Data of the sunspot group at its maximum area development |
| MW | Mount Wilson Observatories |
| KK | Kodaikanal observatories |
 |
Cycle averaged tilt angle based on DPDall |
 |
Cycle averaged tilt angle based on DPDmax |
 |
Tilt coefficients for linear form of Joy’s law obtained by the normalization method based on DPDall |
 |
Tilt coefficients for linear form of Joy’s law obtained by the normalization method based on DPDmax |
 |
Tilt coefficients for square-root form of Joy’s law obtained by the normalization method based on DPDall |
 |
Tilt coefficients for square-root form of Joy’s law obtained by the normalization method based on DPDmax |
 |
Tilt coefficients for linear form of Joy’s law obtained by fitting method based on DPDall |
 |
Tilt coefficients for linear form of Joy’s law obtained by fitting method based on DPDmax |
 |
Tilt coefficients for square-root form of Joy’s law obtained by fitting method based on DPDall |
 |
Tilt coefficients for square-root form of Joy’s law obtained by fitting method based on DPDmax |
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