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Table 2 Fitted trends (offsets at 2000.0 in [mm], and drifts in [mm/year]) for the geocenter motion as computed from ESMGFZ, GCTI20, and ILRS data (see text). In each case, the trends have been fitted from the corresponding time-series period listed in column ”period”. Formal errors are given in parentheses

From: Comparison of non-tidal loading data for application in a secular terrestrial reference frame

Provider

Period

x

y

z

Offset

Drift

Offset

Drift

Offset

Drift

ESMGFZ

1976.0–2021.5

1.74 (0.01)

– 0.23 (0.00)

0.83 (0.01)

– 0.06 (0.00)

0.93 (0.01)

– 0.01 (0.00)

1980.0–2021.5

1.27 (0.01)

– 0.16 (0.00)

0.75 (0.01)

– 0.04 (0.00)

0.91 (0.01)

– 0.01 (0.00)

1993.0–2021.5

1.48 (0.01)

– 0.17 (0.00)

0.63 (0.01)

– 0.03 (0.00)

0.37 (0.02)

0.04 (0.00)

2000.0–2021.5

2.07 (0.02)

– 0.22 (0.00)

1.31 (0.03)

– 0.08 (0.00)

– 1.37 (0.03)

0.17 (0.00)

2010.0–2021.5

– 3.20 (0.07)

0.09 (0.00)

– 4.67 (0.08)

0.28 (0.01)

– 3.94 (0.09)

0.33 (0.01)

GCTI20

1980.0–2021.2

– 0.49 (0.01)

– 0.06 (0.00)

0.69 (0.01)

0.06 (0.00)

– 1.65 (0.01)

– 0.11 (0.00)

1993.0–2021.2

– 0.48 (0.01)

– 0.06 (0.00)

0.62 (0.01)

0.06 (0.00)

– 1.52 (0.01)

– 0.12 (0.00)

2000.0–2021.2

– 0.57 (0.02)

– 0.05 (0.00)

0.57 (0.02)

0.07 (0.00)

– 1.97 (0.02)

– 0.09 (0.00)

2010.0–2021.2

– 0.74 (0.05)

– 0.04 (0.00)

1.70 (0.05)

– 0.00 (0.00)

– 1.88 (0.07)

– 0.09 (0.00)

SLR

1993.0–2021.0

0.21 (0.12)

– 0.00 (0.01)

– 0.58 (0.11)

0.02 (0.01)

– 0.38 (0.18)

0.06 (0.02)

2000.0–2021.0

0.38 (0.20)

– 0.01 (0.02)

– 0.65 (0.18)

0.02 (0.01)

0.83 (0.30)

– 0.04 (0.02)

2010.0–2021.0

– 0.12 (0.63)

0.01 (0.04)

– 1.21 (0.63)

0.06 (0.04)

– 0.65 (1.05)

0.05 (0.07)