2019 Oct (c192)

    General session information:

    block schedule

    Report, regarding the poor performace of the VLBA in this session:

    c192VLBAreport.pdf

    Description of special processing applied to P3 (Pico Veleta DBBC3) data in this session:

    Special processing of P3 (Pico Veleta DBBC3) data in C192 session

    Storage requirements

    Stations Obs time [hrs] total volume [TB] @4Gbps Recording
    VLBA 39 36 Mark6
    Ys, On, Mk, Eb 38 +2 36 local & etransfer
    Pv 38 +2 36 Mark6
    KVN 36 32.5 local & etransfer
    GLT 45 40.5 Mark6

    assuming a duty cycle of 50%.

    Correlation Status

    Project

    Code

    Block

    Code

    Sources DOYS UT Freq Stations Status PI Comment
      F192A   276   86360 MHz Ef, On, O6, Ys, Mh, Pv ,P3 done n/a fringe check
    MC004 C192A 1803+784 276-277 18:30-04:30 86360 MHz Ef, On, Ys, Mh, Pv, P3, VLBA, GLT, KVN correlation finished, data released to PI CUI  
    MM017A, MB011B C192B FERMI sources 277-278 04:30-07:30 86360 MHz Ef, On, Ys, Mh, Pv, P3, VLBA, GLT, KVN correlation finished, data released to PI MARSCHER

    C192B and MM017A coinside except for 2013+370 (277:1445-1701) data used for MB011B too.

    MB011B C192C Cygnus A 278-279 13:15-09:30 86360 MHz Ef, On, Ys, Mh, Pv, P3, VLBA, GLT, KVN correlation finished, data released to PI BACH  

    General comments

    • Ys has switched the IF configuration with c192b from using A/C to A/B. The first affected scan is no0053. The change was done due to a faulty calibration of board C which led to lower amplitudes in LCP prior to the change.
    • "Normal" Pico Veleta PV (DBBC2) data was recorded with wrong polarization setup for most of the session (during C192A, C192B and the first quarter of C192C parts both polarization channels recorded RCP and LCP was completely lost). That's why the main production correlation was done with DBBC3 data in 16 32 MHz band mode rather than usual 8 64 MHz per pol. Because DBBC3 is still in the comissioning stage, certain hardware problems were detected -- phase instability and small amplitude insonsistencies for different boards. To compensate this, additional per band delay corrections were applied during the correlation, see details here.
    Tag page (Edit tags)
    • No tags
    Pages that link here
    Page statistics
    1075 view(s), 22 edit(s) and 6130 character(s)

    Comments

    You must login to post a comment.

    Attach file

    Attachments

    FileSizeDateAttached by 
     c192VLBAreport.pdf
    No description
    2.31 MB17:08, 17 Dec 2019yuriiActions