Table 13.
Parameters of the transformations between ICRF3 (S/X band catalog) and other frames, including rotation, glide (dipole terms), and quadrupole terms (all in microarcseconds), plus the number of sources involved in the calculations.
Reference frame |
ICRF3 catalog |
||||
---|---|---|---|---|---|
Parameters | ICRF2 | ICRF2GA | Gaia-CRF2 | K band | X/Ka band |
Nb sources | |||||
common | 3414 | 3414 | 2983 | 793 | 638 |
outliers | 496 | 382 | 371 | 25 | 82 |
used | 2918 | 3032 | 2612 | 768 | 556 |
Rotation | |||||
R1 | 8 ± 4 | 16 ± 4 | −22 ± 8 | 3 ± 8 | −22 ± 8 |
R2 | 15 ± 4 | 19 ± 4 | 23 ± 8 | −10 ± 8 | 3 ± 8 |
R3 | 0 ± 3 | −5 ± 3 | −5 ± 7 | −6 ± 4 | 4 ± 5 |
Glide (dipole) | |||||
D1 | −22 ± 4 | −18 ± 3 | −13 ± 8 | 8 ± 7 | 1 ± 7 |
D2 | −63 ± 4 | 4 ± 3 | −4 ± 8 | −36 ± 7 | −32 ± 7 |
D3 | −90 ± 4 | −39 ± 4 | 12 ± 8 | −19 ± 8 | 314 ± 8 |
Quadrupole | |||||
E20 | 43 ± 4 | 39 ± 4 | 35 ± 9 | 16 ± 9 | −75 ± 10 |
M20 | 5 ± 4 | 3 ± 3 | 1 ± 8 | 31 ± 6 | −207 ± 7 |
![]() |
−11 ± 5 | −13 ± 4 | 9 ± 10 | 20 ± 8 | 34 ± 9 |
![]() |
3 ± 5 | −2 ± 4 | 13 ± 10 | 51 ± 9 | −35 ± 9 |
![]() |
−1 ± 4 | −1 ± 4 | −3 ± 10 | −16 ± 8 | −2 ± 8 |
![]() |
−5 ± 4 | −6 ± 4 | 6 ± 10 | 25 ± 9 | 8 ± 9 |
![]() |
1 ± 2 | −1 ± 2 | 1 ± 5 | 8 ± 3 | 6 ± 3 |
![]() |
3 ± 2 | 2 ± 2 | 2 ± 5 | 7 ± 3 | −3 ± 4 |
![]() |
−3 ± 2 | −1 ± 2 | 3 ± 5 | −12 ± 4 | 7 ± 5 |
![]() |
2 ± 2 | 1 ± 2 | −5 ± 5 | 5 ± 4 | −7 ± 5 |
Notes. ICRF2GA denotes the equivalent of ICRF2 that was reproduced after incorporating Galactic acceleration in the modeling.
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