F181A

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

• ftp fringe test for European stations before the GMVA 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

• Ef: 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, see the vex file above.
• On: 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, clocks were used from the previous session, correlation was run with 2048 channels.

Post-Correlation checks