Y191A: PV - YS test (Ys dual-pol receiver)

    Y191A Correlation Report

    General information

    • The purpose of this observation was to test the new Ys dual-pol receiver.
    • Only two antennas participated, Pico Veleta and Yebes.
    • Test time: 14 March (day 73) 2019, 10:00-12:50UT
    • Two sources observed, 3C345 (scans No0001-4) and 3C84 (scans No0005-12)

    Status

    Parts of a few scans were correlated, test is a success.

    Fringes

    Baseline Code Fringes Plots Comments
    Pv-Ys PY Yes

    New dual-pol receiver:

    Scan No0003:

    y191a_No0003_3C345_PY_LL.pdf
    y191a_No0003_3C345_PY_LR.pdf
    y191a_No0003_3C345_PY_RL.pdf
    y191a_No0003_3C345_PY_RR.pdf

    Scan No0009:

    y191a_No0009_3C84_PY_LL.pdf
    y191a_No0009_3C84_PY_LR.pdf
    y191a_No0009_3C84_PY_RL.pdf
    y191a_No0009_3C84_PY_RR.pdf

    Returned to old single-pol receiver (RCP duplicates the LCP signal)

    Scan No0010:

    y191a_No0010_3C84_PY_LL.pdf
    y191a_No0010_3C84_PY_LR.pdf
    y191a_No0010_3C84_PY_RL.pdf
    y191a_No0010_3C84_PY_RR.pdf

    Strong parallel-hand fringes, no or weak cross-hand fringes. SNR of RR fringe is somewhat larger than the one for LL fringe.

    The amplitude vs channels plots of both LL and RR exhibit a strange "bowl" shape, with amplitudes in edge channels up to 4 times higher than the amplitude in the central ones.

    After the return back to the old single-pol receiver the problem persists (see LL and LR plots of scan No0010).

    Notes

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