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

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

Modified 16:19, 18 Mar 2019 by yurii | Page History

    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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     y191a_No0003_3C345_PY_LL_2.pdf
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    		46.21 kB12:40, 18 Mar 2019yuriiActions
     y191a_No0003_3C345_PY_LR.pdf
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    		48.18 kB12:40, 18 Mar 2019yuriiActions
     y191a_No0003_3C345_PY_RL.pdf
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    		47.99 kB12:40, 18 Mar 2019yuriiActions
     y191a_No0003_3C345_PY_RR_2.pdf
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    		46.31 kB12:40, 18 Mar 2019yuriiActions
     y191a_No0009_3C84_PY_LL.pdf
    No description
    		45.8 kB15:05, 18 Mar 2019yuriiActions
     y191a_No0009_3C84_PY_LR.pdf
    No description
    		48.8 kB15:05, 18 Mar 2019yuriiActions
     y191a_No0009_3C84_PY_RL.pdf
    No description
    		46.58 kB15:05, 18 Mar 2019yuriiActions
     y191a_No0009_3C84_PY_RR.pdf
    No description
    		45.88 kB15:05, 18 Mar 2019yuriiActions
     y191a_No0010_3C84_PY_LL.pdf
    No description
    		46.57 kB15:05, 18 Mar 2019yuriiActions
     y191a_No0010_3C84_PY_LR.pdf
    No description
    		46.93 kB15:05, 18 Mar 2019yuriiActions
     y191a_No0010_3C84_PY_RL.pdf
    No description
    		48.59 kB15:05, 18 Mar 2019yuriiActions
     y191a_No0010_3C84_PY_RR.pdf
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    		47.68 kB15:05, 18 Mar 2019yuriiActions