Table 1 Classification of estimated parameters derived from space geodetic techniques

Common, global

Satellite orbits

GNSS orbits

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LEO orbit

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\(\checkmark\)

\(\checkmark\)

LEO clock corrections

\(\checkmark\)

(\(\checkmark\))

GENESIS orbit

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\(\checkmark\)

\(\checkmark\)

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GENESIS clock corr.

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\(\checkmark\)

\(\checkmark\)

\(\checkmark\)

EOP

Pole coordinates

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\(\checkmark\)

\(\checkmark\)

\(\checkmark\)

(\(\checkmark\))

UT1

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(\(\checkmark\))

LoD

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\(\checkmark\)

\(\checkmark\)

\(\checkmark\)

(\(\checkmark\))

Nutation

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(\(\checkmark\))

Nutation rates

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\(\checkmark\)

\(\checkmark\)

\(\checkmark\)

(\(\checkmark\))

Gravity field

Earth center of mass

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(\(\checkmark\))

Low degree coefficients

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\(\checkmark\)

\(\checkmark\)

(\(\checkmark\))

TRF

Scale

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(\(\checkmark\))

\(\checkmark\)

(\(\checkmark\))

(\(\checkmark\))

Common, local

Atmosphere

Ionosphere parameters

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\(\checkmark\)

Troposphere parameters

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\(\checkmark\)

(\(\checkmark\))

\(\checkmark\)

TRF

Station positions

\(\checkmark\)

\(\checkmark\)

\(\checkmark\)

\(\checkmark\)

(\(\checkmark\))

Station velocities

\(\checkmark\)

\(\checkmark\)

\(\checkmark\)

\(\checkmark\)

(\(\checkmark\))

Time–frequency

Station clock corrections

\(\checkmark\)

\(\checkmark\)

(\(\checkmark\))

\(\checkmark\)

(\(\checkmark\))

Technique-specific

CRF

Quasar positions

\(\checkmark\)

Moon orbit

\(\checkmark\)

Instrumental

GNSS clock corrections

\(\checkmark\)

Range biases

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\(\checkmark\)