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Tests of Dynamic Scheduling with the three AuScope antennas and others (most recently Hart 26m) are continuing with the next observations planned for June.
Jim Lovell - 26 May 2016
Kashima 34m
- Fringe test experiments with VGOS mode (using ADS3000+'s DBBC mode for narrow channels VDIF format recording ) has between made between Kashima34,11m, and Ishioka for preparation of Ishioka's participation to VGOS session since beginning of Aug. There were some failure of detecting fringes with 64Msps-2bit-16ch mode for while, though fringe was found on 23 Aug. between Ishioka-Kas11.
- Broadband Fringe test VLBI experiment was successfully performed among Hobart-Ishioka-Kashima34, with broadband recording (1024MHz/band x 4band). Observation frequency range was Fc=(4.36GHz, 5.112GHz, 9.96GHz, 12.86GHz)
- 34m antenna ACU trouble was found on 23 Aug. Now we are trying to fix it.
- 34m antenna ACU trouble was fixed. There are no significant change and progress at 34m station.
- Broadband 24h experiment was conducted between MBL1-MBL2-Ishioka13 stations. Purpose was to check improvement of residual and precision in geodetic observation. Since precision of delay observables have been exceeding the post fit residuals in Kas34-MBL1-MBL2 observations and it has been indicating troposphere is the limiting factor of geodetic/frequency transfer VLBI. I expected improvement by fast switching with Ishioka-MBL1-MBL2 network. Though the network is small and elevation angles are almost the same for all stations, thus it seems that independence of parameter estimation of Atm is not good enough, unfortunately. Experiment was in 12-13 Sep. and correlation processing has finished. We will try to see the analysis next week.
Mamoru Sekido - 22 SepMamoru Sekido - 24 Aug. 2016
Report on the Australia-Japan broadband fringe tests (PDF).
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