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Table 3

Stochastic errors of catalogues found by the NCH method.

Catalogue Original differences Corrected differences
α/δ α/δ
[μas] [μas]

AUS 49/56 46/51
BKG 23/27 21/27
CGS 27/46 25/27
GSF 15/21 14/17
IGG 48/59 42/44
OPA 15/23 14/18
RFC 63/93 60/74
SHA 13/17 12/17
USN 10/12 10/10

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