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Modified 12:56, 6 Sep 2017 by jwagner | Page History

    Version as of 08:53, 25 Nov 2024

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    MG002 Correlation Report

    General

    • Session info: http://www3.mpifr-bonn.mpg.de/div/vlbi/globalmm/
    • Station feedback: http://www3.mpifr-bonn.mpg.de/div/vlbi/globalmm/sessions/apr17/feedback_apr17.asc
    • ALMA QA2: 2016.1.01116.V was used for polarization conversion
    • This experiment has ALMA with 32x62.5MHz, VLBA with 2x128MHz channels, and most of the EVN with a 1x512MHz channel
    • Two EVN stations (Yebes, Pico Veleta) observed in an incorrect backend mode, with a 32 MHz polyphase filterbank.
    • Due to the issue at Yebes and Pico, three correlations were performed:
      • a) standard ALMA correlation setup (58 MHz bands) discarding Yebes and Pico
      • b) narrower band correlation setup (32 MHz bands) including Yebes and Pico
      • c) mixed-band correlation with additional postprocessing of all baselines to Yebes and Pico Veleta (reconstructed 58 MHz bands)
    • The correlation output (c) appears correct, but uses a new feature that has not been vigorously tested. The data are provided without guarantees. Details are given further below.

    Fringes

    Station Fringes Comment
    Ef yes Effelsberg DBBC2
    Eb yes Effelsberg RDBE
    On yes  
    Aa yes  
    Mh no faulty backend configuration
    Pv yes LCP bad (2bit sample dist. 78%:0:0:22%), is OK in ma008 and mb007
    Ys yes  
    Fd yes  
    La yes  
    Pt yes weak or no fringes
    Nl yes  
    La yes  
    Kp yes  
    Ov yes  
    Mk no wide fringe search but no fringes found
    Br yes  

    Fringes plotted on all baselines to Effelserg (No0134 Effelsberg PDF), and ALMA (No0140 ALMA PDF), and VLBA only (No0200 VLBA FD PDF).

    Notes

    1. In case (c) the additional processing consisted of, first, correlation with 58 MHz bands and several narrower bands that fitted the Pico/Yebes recorded bands (e.g., 32 MHz, 24 MHz, 2 MHz and similar), secondly, after correlation passing the visibility data through a post-processing script to form 58 MHz bands on the affected baselines using the narrow bands (i.e., combining visibilities in frequency domain from 32 + 24 + 2 MHz bands), thirdly, spectrally averaging inside the 58 MHz bands from 3712 channels per band to the final goal of 116 channels per band that matches the originally intended correlation mode.
    2. Yebes began recording 20 seconds late in every scan; lost scans No0061 to No0063; recorded scans No0064 to No0067 in wideband mode as intendend; recorded scans No0068 until the end in 32 MHz polyphase filter bank mode
    3. Pico restarted backend for scan 092-2100, bad sampler statistics in earlier scans

    Post-Correlation checks

    Residuals

    reference A (ALMA), pols LL and RR, residuals in 32 MHz correlation run (a)

    residuals_mg002_32_A.png

    reference Y (Yebes), pols LL and RR, residuals in 32 MHz correlation run (a)

    residuals_mg002_32_Y.png

    reference A (ALMA), pols LL and RR, residuals in 58 MHz correlation run (c)

    residuals_mg002_58_A.png

    reference Y (Yebes), pols LL and RR, residuals in 58 MHz correlation run (c)

    residuals_mg002_58_Y.png

    reference E (Effelsberg), pols LL and RR, residuals in 58 MHz correlation run (c)

    residuals_mg002_58_E.png

    FITS completeness (pclist)

    Legend:
    o:              station is included in the FITS-file (data is complete)
    x:              expected station is missing in the FITS-file
    number:         percentage of job time in the FITS-file compared to expected time.

                                     EF EB ON YS PV MH NL FD PT LA KP OV BR AA MK 
mg002_01 No0061    OJ287 3mm_ddc o  o  o  x  x  93 .  .  .  .  .  .  .  .  .  
mg002_02 No0062    OJ287 3mm_ddc o  o  o  x  x  95 .  .  .  .  .  .  .  .  .  
mg002_03 No0063    OJ287 3mm_ddc o  o  o  x  x  95 .  .  .  .  .  .  .  .  .  
mg002_04 No0064    OJ287 3mm_ddc o  o  o  x  x  95 .  .  .  .  .  .  .  .  .  
mg002_05 No0065    OJ287 3mm_ddc o  o  o  x  x  95 .  .  .  .  .  .  .  .  .  
mg002_06 No0066    OJ287 3mm_ddc o  o  o  x  x  95 .  .  .  .  .  .  .  .  .  
mg002_07 No0067    OJ287 3mm_ddc o  o  o  x  x  95 .  .  .  .  .  .  .  .  .  
mg002_08 No0068    OJ287 3mm_ddc o  o  o  x  x  95 .  .  .  .  .  .  .  .  .  
mg002_09 No0069    OJ287 3mm_ddc o  o  o  x  x  95 .  .  .  .  .  .  .  .  .  
mg002_10 No0070    OJ287 3mm_ddc o  o  o  x  x  95 .  .  .  .  .  .  .  .  .  
mg002_11 No0071    OJ287 3mm_ddc o  o  o  x  x  95 .  .  .  .  .  .  .  .  .  
mg002_12 No0072    OJ287 3mm_ddc o  o  o  x  x  95 .  .  .  .  .  .  .  .  .  
mg002_13 No0075 J0510+18 3mm_ddc o  o  o  x  x  x  o  o  o  o  o  o  o  .  .  
mg002_14 No0078 J0510+18 3mm_ddc o  o  o  x  x  x  o  o  o  o  o  o  o  .  .  
mg002_15 No0081    OJ287 3mm_ddc o  o  o  x  x  x  o  .  .  .  .  .  .  o  .  
mg002_16 No0084 J0510+18 3mm_ddc .  .  .  .  .  .  .  o  o  o  o  o  o  .  .  
mg002_17 No0087    OJ287 3mm_ddc o  o  o  x  x  50 o  .  .  .  .  .  .  o  .  
mg002_18 No0090 J0510+18 3mm_ddc .  .  .  .  .  .  .  o  o  o  o  o  o  .  .  
mg002_19 No0093    OJ287 3mm_ddc o  o  o  x  x  95 o  o  o  o  .  .  .  o  .  
mg002_20 No0096    OJ287 3mm_ddc o  o  o  x  x  95 o  o  o  o  o  .  o  o  .  
mg002_21 No0099 J0510+18 3mm_ddc o  o  o  x  x  .  o  o  o  o  o  o  o  o  .  
mg002_22 No0102    OJ287 3mm_ddc o  o  o  x  x  95 o  o  o  o  o  o  o  o  .  
mg002_23 No0105    OJ287 3mm_ddc o  o  o  x  x  95 o  o  o  o  o  o  o  o  .  
mg002_24 No0108    OJ287 3mm_ddc o  o  o  x  x  95 o  o  o  o  o  o  o  x  .  
mg002_25 No0111 J0510+18 3mm_ddc .  .  .  .  .  .  o  o  o  o  o  o  o  o  o  
mg002_26 No0112 1055+018 3mm_ddc o  o  o  x  x  o  .  .  .  .  .  .  .  .  .  
mg002_27 No0115    OJ287 3mm_ddc o  o  o  x  x  95 o  o  o  o  o  o  o  o  .  
mg002_28 No0118    OJ287 3mm_ddc o  o  o  x  x  95 o  o  o  o  o  o  o  o  .  
mg002_29 No0121    OJ287 3mm_ddc o  o  o  x  x  95 o  o  o  o  o  o  o  x  .  
mg002_30 No0124 J0510+18 3mm_ddc .  .  .  .  .  .  o  o  o  o  o  o  o  o  .  
mg002_31 No0125 1055+018 3mm_ddc o  o  o  x  x  16 .  .  .  .  .  .  .  .  .  
mg002_32 No0128    OJ287 3mm_ddc o  o  o  x  x  95 o  o  o  o  o  o  o  o  .  
mg002_33 No0131    OJ287 3mm_ddc o  o  o  x  x  95 o  o  o  o  o  o  o  o  .  
mg002_34 No0134    OJ287 3mm_ddc o  o  o  x  x  95 o  o  o  o  o  o  o  x  o  
mg002_35 No0137 1055+018 3mm_ddc o  o  o  x  x  95 o  o  o  o  o  o  o  o  .  
mg002_36 No0140    OJ287 3mm_ddc o  o  o  x  x  .  o  o  o  o  o  o  o  o  o  
mg002_37 No0143    OJ287 3mm_ddc o  o  o  x  x  .  o  o  o  o  o  o  o  o  o  
mg002_38 No0146 1055+018 3mm_ddc o  o  o  x  x  .  o  o  o  o  o  o  o  x  .  
mg002_39 No0149    OJ287 3mm_ddc o  o  .  x  x  .  o  o  o  o  o  o  o  o  o  
mg002_40 No0152    OJ287 3mm_ddc .  .  .  .  .  .  o  o  o  o  o  o  o  o  o  
mg002_41 No0155    OJ287 3mm_ddc .  .  .  .  .  .  o  o  o  o  o  o  o  o  o  
mg002_42 No0158 1055+018 3mm_ddc .  .  .  .  .  .  o  o  o  o  o  o  o  x  .  
mg002_43 No0161    OJ287 3mm_ddc .  .  .  .  .  .  o  o  x  o  o  o  o  o  x  
mg002_44 No0164    OJ287 3mm_ddc .  .  .  .  .  .  o  o  x  o  o  o  o  o  x  
mg002_45 No0167    OJ287 3mm_ddc .  .  .  .  .  .  o  o  x  o  o  o  o  o  x  
mg002_46 No0170 1055+018 3mm_ddc .  .  .  .  .  .  o  o  x  o  o  o  o  x  x  
mg002_47 No0173    OJ287 3mm_ddc .  .  .  .  .  .  o  o  x  o  o  o  o  o  x  
mg002_48 No0176    OJ287 3mm_ddc .  .  .  .  .  .  o  o  x  o  o  o  o  o  x  
mg002_49 No0179 1055+018 3mm_ddc .  .  .  .  .  .  o  o  73 o  o  o  o  o  73 
mg002_50 No0182    OJ287 3mm_ddc .  .  .  .  .  .  o  o  o  o  o  o  o  .  o  
mg002_51 No0185    OJ287 3mm_ddc .  .  .  .  .  .  o  o  o  o  o  o  o  .  o  
mg002_52 No0188    OJ287 3mm_ddc .  .  .  .  .  .  o  o  o  o  o  o  o  .  o  
mg002_53 No0191 1055+018 3mm_ddc .  .  .  .  .  .  o  o  o  o  o  o  o  .  o  
mg002_54 No0194    OJ287 3mm_ddc .  .  .  .  .  .  o  o  o  o  o  o  o  .  o  
mg002_55 No0197    OJ287 3mm_ddc .  .  .  .  .  .  o  o  o  o  o  o  o  .  o  
mg002_56 No0200    OJ287 3mm_ddc .  .  .  .  .  .  o  o  o  o  o  o  o  .  o  
mg002_57 No0203 1055+018 3mm_ddc .  .  .  .  .  .  o  o  o  o  o  o  o  .  o  
mg002_58 No0206    OJ287 3mm_ddc .  .  .  .  .  .  o  o  o  o  o  o  o  .  o  
mg002_59 No0209    OJ287 3mm_ddc .  .  .  .  .  .  o  o  o  o  o  o  o  .  o  
mg002_60 No0210    OJ287 3mm_ddc .  .  .  .  .  .  x  x  x  x  x  x  x  .  o