Table of contents
- 1. F181A Correlation Report
- 1.1. General information
- 1.2. Fringes
- 1.3. Notes
- 1.4. Post-Correlation checks
- 1.4.1. Residuals
- 1.4.2. FITS completeness (pclist)
F181A Correlation Report
General information
- Session info: http://www3.mpifr-bonn.mpg.de/div/vlbi/globalmm/
- Station feedback: http://www3.mpifr-bonn.mpg.de/div/vlbi/globalmm/sessions/apr18/feedback_apr18.asc
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ftp fringe test for European stations before the Spring session 2018 (c181)
- day 102. UT 12:00-14:00
- sources: 3C454.3, IKTAU (SiO line at 86225.06105 MHz), 3C120
Fringes
Complete scan 1, fringe plots of all stations, including auto correlations: No0001_all.pdf
Vex file, used in correlations: f181a.vex
Notes
Jun Yang: "Onsala scan 1 should be OK. While, our scans 2 and 3 might have some problems after restarting the FS and the schedule to fix a problem related to caltsys. I saw only half bandwidth, 16 MHz , in the first subband in my auto-correlation plot. So, I skipped scan 4 and reloaded PFB firmware before scan 5. Currently, I have not seen the problem any more."
Clock searching was not performed during the test for the sake of speed, correlation was run with 2048 channels.
It was found that Ef channels were not a05,a06,a07,a08,a09,a10,a11,a12,b05,b06,b07,b08,b09,b10,b11,b12 (first all frequencess of one polarization, then all frequencess of the other polarization) as expected, but rather a05,b05,a06,b06,a07,b07,a08,b08,a09,b09,a10,b10,a11,b11,a12,b12 (swapping polarizations back and forth for each frequency). This was fixed by editing the vex file's $FREQ and $BBC sections specifically for Ef, se the vex file above.
