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## The Comparison of RASFX and DiFX Geodetic VLBI Processing Results

Transactions of IAA RAS, issue 49, 37–42 (2019)

Keywords: VLBI, correlator, DiFX, RASFX, PIMA, group delay

### Abstract

We found that the differences of the UT1-UTC measures from RASFX and DIFX correlators are mainly due to the different realisation of mathematical computations of the post-processing algorithms. Therefore it is necessary to use common software to compare calculated group delays from different correlators. In this work we present the comparison of group delays from RASFX correlator to the group delays obtained from DiFX correlator output using PIMA software. The data converter was developed which allowed us to use PIMA for post-processing the RASFX data instead of native software. A series of intensive sessions with 13-m and 32-m radio telescopes were processed using this new routine. The obtained results are in a good agreement within mean accuracy of group delay.

### Citation

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V. O. Ken, A. E. Melnikov. The Comparison of RASFX and DiFX Geodetic VLBI Processing Results // Transactions of IAA RAS. — 2019. — Issue 49. — P. 37–42. @article{ken2019, abstract = {We found that the differences of the UT1-UTC measures from RASFX and DIFX correlators are mainly due to the different realisation of mathematical computations of the post-processing algorithms. Therefore it is necessary to use common software to compare calculated group delays from different correlators. In this work we present the comparison of group delays from RASFX correlator to the group delays obtained from DiFX correlator output using PIMA software. The data converter was developed which allowed us to use PIMA for post-processing the RASFX data instead of native software. A series of intensive sessions with 13-m and 32-m radio telescopes were processed using this new routine. The obtained results are in a good agreement within mean accuracy of group delay.}, author = {V.~O. Ken and A.~E. Melnikov}, doi = {10.32876/ApplAstron.49.37-42}, issue = {49}, journal = {Transactions of IAA RAS}, keyword = {VLBI, correlator, DiFX, RASFX, PIMA, group delay}, pages = {37--42}, title = {The Comparison of RASFX and DiFX Geodetic VLBI Processing Results}, url = {http://iaaras.ru/en/library/paper/1966/}, year = {2019} } TY - JOUR TI - The Comparison of RASFX and DiFX Geodetic VLBI Processing Results AU - Ken, V. O. AU - Melnikov, A. E. PY - 2019 T2 - Transactions of IAA RAS IS - 49 SP - 37 AB - We found that the differences of the UT1-UTC measures from RASFX and DIFX correlators are mainly due to the different realisation of mathematical computations of the post-processing algorithms. Therefore it is necessary to use common software to compare calculated group delays from different correlators. In this work we present the comparison of group delays from RASFX correlator to the group delays obtained from DiFX correlator output using PIMA software. The data converter was developed which allowed us to use PIMA for post-processing the RASFX data instead of native software. A series of intensive sessions with 13-m and 32-m radio telescopes were processed using this new routine. The obtained results are in a good agreement within mean accuracy of group delay. DO - 10.32876/ApplAstron.49.37-42 UR - http://iaaras.ru/en/library/paper/1966/ ER -