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F181A

Modified 21:03, 12 Apr 2018 by yurii | Page History

    Version as of 12:29, 20 May 2024

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    F181A Correlation Report

    General information

    Fringes

    Complete scan 1, fringe plots of all stations, including auto correlations: No0001_all.pdf

    Vex file, used in correlations: f181a.vex

     

    Station Code Fringes Plots Comments
    Ef B yes

    EfMh, all pols, scan 1:

    f181a_No0001_3C454.3_BZ_LL.pdf, f181a_No0001_3C454.3_BZ_LR.pdf,
    f181a_No0001_3C454.3_BZ_RL.pdf, f181a_No0001_3C454.3_BZ_RR.pdf

    EfMh. all pols, scan 2:

    f181a_No0002_3C454.3_BZ_LL.pdf, f181a_No0002_3C454.3_BZ_LR.pdf,
    f181a_No0002_3C454.3_BZ_RL.pdf, f181a_No0002_3C454.3_BZ_RR.pdf

    EfOn, all pols, scan 1:

    f181a_No0001_3C454.3_BX_LL.pdf, f181a_No0001_3C454.3_BX_LR.pdf,
    f181a_No0001_3C454.3_BX_RL.pdf, f181a_No0001_3C454.3_BX_RR.pdf

    EfPv, all pols, scan 1:

    f181a_No0001_3C454.3_BP_LL.pdf, f181a_No0001_3C454.3_BP_LR.pdf,
    f181a_No0001_3C454.3_BP_RL.pdf, f181a_No0001_3C454.3_BP_RR.pdf

    EfYs, LL only, scan 1:

    f181a_No0001_3C454.3_BY_LL.pdf

    EfYs, LL and LR, scan 2:

    f181a_No0002_3C454.3_BY_LL.pdf, f181a_No0002_3C454.3_BY_LR.pdf

    Good weather.

    See additional notes below.
    On X yes

    EfOn, all pols, scan 1:

    f181a_No0001_3C454.3_BX_LL.pdf, f181a_No0001_3C454.3_BX_LR.pdf,
    f181a_No0001_3C454.3_BX_RL.pdf, f181a_No0001_3C454.3_BX_RR.pdf

    OnPv, all pols, scan 1:

    f181a_No0001_3C454.3_XP_LL.pdf, f181a_No0001_3C454.3_XP_LR.pdf,
    f181a_No0001_3C454.3_XP_RL.pdf, f181a_No0001_3C454.3_XP_RR.pdf

    MhOn, all pols, scan 1:

    f181a_No0001_3C454.3_ZX_LL.pdf, f181a_No0001_3C454.3_ZX_LR.pdf,
    f181a_No0001_3C454.3_ZX_RL.pdf, f181a_No0001_3C454.3_ZX_RR.pdf

    Good weather, Tsys* ~180 K at El 33 deg.

    See additional notes below.
    Ys Y yes

    EfYs, LL only, scan 1:

    f181a_No0001_3C454.3_BY_LL.pdf

    EfYs, LL and LR, scan 2:

    f181a_No0002_3C454.3_BY_LL.pdf, f181a_No0002_3C454.3_BY_LR.pdf

    PvYs, LL and LR, scan 1:

    f181a_No0001_3C454.3_PY_LL.pdf, f181a_No0001_3C454.3_PY_LR.pdf

    Overcast, light wind.

    As usual, Ys observed LCP only, but it was also recorded as fake RCP, that's why LR fringes are also common.
    Mh Z yes

    EfMh, all pols, scan 1:

    f181a_No0001_3C454.3_BZ_LL.pdf, f181a_No0001_3C454.3_BZ_LR.pdf,
    f181a_No0001_3C454.3_BZ_RL.pdf, f181a_No0001_3C454.3_BZ_RR.pdf

    EfMh. all pols, scan 2:

    f181a_No0002_3C454.3_BZ_LL.pdf, f181a_No0002_3C454.3_BZ_LR.pdf,
    f181a_No0002_3C454.3_BZ_RL.pdf, f181a_No0002_3C454.3_BZ_RR.pdf

     
    MhPv, all pols, scan 1:
    		 Clear sky.
    Pv P yes

    EfPv, all pols, scan 1:

    f181a_No0001_3C454.3_BP_LL.pdf, f181a_No0001_3C454.3_BP_LR.pdf,
    f181a_No0001_3C454.3_BP_RL.pdf, f181a_No0001_3C454.3_BP_RR.pdf

    OnPv, all pols, scan 1:

    f181a_No0001_3C454.3_XP_LL.pdf, f181a_No0001_3C454.3_XP_LR.pdf,
    f181a_No0001_3C454.3_XP_RL.pdf, f181a_No0001_3C454.3_XP_RR.pdf

    MhPv, all pols, scan 1:
    		 Light snowfall, therefore late start. Weather degraded later, stopped at ~UT 13:25.

    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, see the vex file above.

    Post-Correlation checks

    Residuals

    FITS completeness (pclist)