  COVER INFORMATION 

 Station:    VLBA_FD   (Code Fd ) 
 Experiment: Fine-scale imaging of M87
 Exp. Code:  gs042   


Schedule Version:       1.00
Processed by SCHED version:  11.40  Release 11.4.  March 14, 2015

PI:       Tuomas Savolainen

Address:  Aalto University Metsahovi Radio Observatory
          Metsahovintie 114, 02540 Kylmala, Finland
 
 

Phone:    +358505819717
EMAIL:    tuomas.k.savolainen@aalto.fi
Fax:
Phone during observation: +358505819717

Observing mode: K-band dual-pol

Notes:    K-band, Radioastron-compatible frequency setup
          P-CAL is ON
          Tsys is ON
          auto-level (AGC) is ON

Schedule for VLBA_FD   (Code Fd )                                   Page   2
               Fine-scale imaging of M87
  UP:  D => Below limits;  H => Below horizon mask;  W => still slewing at end;  blank => Up.
  Early: Seconds between end of slew and start.   Dwell: On source seconds. 
  Disk: GBytes recorded to this point.
  TPStart:  Recording start time.  Frequencies are LO sum (band edge).
  SYNC: Time correlator is expected to sync up.
----------------------------------------------------------------------------------------
Start UT  Source               Start / Stop                 Early    Disk   TPStart
Stop UT                  LST      EL    AZ   HA  UP   ParA  Dwell   GBytes    SYNC
----------------------------------------------------------------------------------------

 --- Mon  14 May 2018   Day 134 ---

 ---------- K-band VLBI scans. Space segment 04: 1228+126 ----------

 Next scan frequencies:  22236.00  22236.00  22236.00  22236.00
 Next BBC frequencies:     736.00    736.00    736.00    736.00
 Next scan bandwidths:      16.00     16.00     16.00     16.00

21 40 00  1228+126     06 14 32   2.6  77.2 -6.3  H  -59.2     0        0   21 40 00
21 56 40  ---          06 31 15   6.1  79.3 -6.0     -59.9     0       32   21 40 01

21 57 20  1228+126     06 31 55   6.3  79.4 -6.0     -60.0    34       32   21 57 20
22 13 20  ---          06 47 58   9.7  81.4 -5.7     -60.5   960       63   21 57 21

22 14 00  1228+126     06 48 38   9.8  81.4 -5.7     -60.6    34       63   22 14 00
22 30 00  ---          07 04 41  13.2  83.4 -5.5     -61.0   960       94   22 14 01

22 35 00  1156+295     07 09 42  28.1  71.0 -4.8     -68.7   264       94   22 35 00
22 37 00  ---          07 11 42  28.6  71.2 -4.8     -68.9   120       98   22 35 01

22 38 40  1228+126     07 13 22  15.1  84.5 -5.3     -61.2    65       98   22 38 40
22 42 40  ---          07 17 23  15.9  84.9 -5.2     -61.3   240      106   22 38 41

 Next scan frequencies:  43127.25  43127.25  43127.25  43127.25
 Next BBC frequencies:     727.25    727.25    727.25    727.25

22 43 30  1228+126     07 18 13  16.1  85.0 -5.2     -61.3    44      106   22 43 30
22 52 00  ---          07 26 44  18.0  86.1 -5.1     -61.5   510      122   22 43 31

 Next scan frequencies:  22236.00  22236.00  22236.00  22236.00
 Next BBC frequencies:     736.00    736.00    736.00    736.00

22 52 40  1228+126     07 27 24  18.1  86.2 -5.1     -61.5    34      122   22 52 40
22 56 40  ---          07 31 25  19.0  86.7 -5.0     -61.5   240      130   22 52 41

 Next scan frequencies:  43127.25  43127.25  43127.25  43127.25
 Next BBC frequencies:     727.25    727.25    727.25    727.25

22 57 30  1228+126     07 32 15  19.1  86.8 -5.0     -61.5    44      130   22 57 30
23 10 00  ---          07 44 47  21.8  88.3 -4.8     -61.7   750      154   22 57 31


SETUP FILE INFORMATION:
   NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings.


 ======== Setup file: ra1cm2.set
   Matching groups in ./gs042_freq.dat:
     v1cm_b3

   Setup group:    9         Station: VLBA_FD           Total bit rate:   256
   Format: VDIF              Bits per sample: 2         Sample rate: 32.000
   Number of channels:  4    DBE type: RDBE_DDC         Speedup factor:   1.00

   Disk used to record data.

   1st LO=  21500.00  21500.00  21500.00  21500.00
   Net SB=         L         L         U         U
   IF SB =         U         U         U         U
   Pol.  =      RCP       LCP       RCP       LCP 
   BBC   =         1         2         3         4
   BBC SB=         L         L         U         U
   IF    =        B         D         B         D 

   VLBA FE=     omit     1cm      omit     1cm 
   VLBA Synth=   9.1      6.1     12.4

  The following frequency sets based on these setups were used.
     See the crd files for VLBA legacy system setups and pcal detection details.

   Frequency Set:  21  Setup file default.  Used with PCAL = 1MHz
   LO sum=   22236.00  22236.00  22236.00  22236.00
   BBC fr=     736.00    736.00    736.00    736.00
   Bandwd=      16.00     16.00     16.00     16.00
   VLBA legacy crd files using  4 channels based on RDBE channels:   1  2  3  4
   CRD fr=     736.01    736.01    735.99    735.99
   CRD bw=      16.00     16.00     16.00     16.00
    Matching frequency sets:  21  22  24  25  26  27  28  29

   Track assignments are: 
    track1=   1,  2,  3,  4
    barrel=roll_off 


 ======== Setup file: ra7mm2.set
   Matching groups in ./gs042_freq.dat:
     v7mm_c8

   Setup group:   37         Station: VLBA_FD           Total bit rate:   256
   Format: VDIF              Bits per sample: 2         Sample rate: 32.000
   Number of channels:  4    DBE type: RDBE_DDC         Speedup factor:   1.00

   Disk used to record data.

   1st LO=  42400.00  42400.00  42400.00  42400.00
   Net SB=         L         L         U         U
   IF SB =         U         U         U         U
   Pol.  =      RCP       LCP       RCP       LCP 
   BBC   =         1         2         3         4
   BBC SB=         L         L         U         U
   IF    =        A         C         A         C 

   VLBA FE=     7mm      omit     7mm      omit
   VLBA Synth=   3.9      7.6     11.6

  The following frequency sets based on these setups were used.
     See the crd files for VLBA legacy system setups and pcal detection details.

   Frequency Set:  32  Setup file default.  Used with PCAL = 1MHz
   LO sum=   43127.25  43127.25  43127.25  43127.25
   BBC fr=     727.25    727.25    727.25    727.25
   Bandwd=      16.00     16.00     16.00     16.00
   VLBA legacy crd files using  4 channels based on RDBE channels:   1  2  3  4
   CRD fr=     727.25    727.25    727.25    727.25
   CRD bw=      16.00     16.00     16.00     16.00
    Matching frequency sets:  32  33  34  35  36  37  38  39

   Track assignments are: 
    track1=   1,  2,  3,  4
    barrel=roll_off 

 POSITIONS OF SOURCES USED IN RECORDING SCANS

   Source                         Source position (RA/Dec)                        Error
                        (B1950)             (J2000)             (Date)            (mas)

 * FAKERA            11 57 21.769299   * 12 00 00.000000     12 00 58.985352       0.00
                     85 16 41.77889    * 85 00 00.00000      84 54 13.48772        0.00
                     From catalog imbedded in main SCHED input file.
                     fake circumpolar target for a TS to look at

   J1239+0730        12 36 52.308755   * 12 39 24.588327     12 40 20.487542       0.10
 * 1236+077          07 46 45.39997    * 07 30 17.18902      07 24 18.52672        0.11
   J1239+07          From catalog imbedded in main SCHED input file.
                     rfc_2012b Petrov, 2012, unpublished 1855 observations

 * 1226+023          12 26 33.245835   * 12 29 06.699731     12 30 03.025117       0.00
   J1229+0203        02 19 43.30547    * 02 03 08.59797      01 57 05.87367        0.00
   3C273B            ./gs042_sources.radioastron
   3C273             AGN, rfc_2013d Petrov, 2013, unpublished 32011 observations, RA-AO4-07, RA-AO3-0

 * 1253-055          12 53 35.831289   * 12 56 11.166557     12 57 08.371431       0.00
   J1256-0547       -05 31 07.99603    *-05 47 21.52489     -05 53 17.34581        0.00
   3C279             ./gs042_sources.radioastron
                     AGN, rfc_2013d Petrov, 2013, unpublished 7924 observations, RA-AO4-07, RA-AO3-04

 * 1228+126          12 28 17.569280   * 12 30 49.423382     12 31 45.092957       0.00
   J1230+1223        12 40 01.74883    * 12 23 28.04365      12 17 28.41095        0.00
   3C274             ./gs042_sources.radioastron
   M87               AGN, rfc_2013d Petrov, 2013, unpublished 55201 observations, RA-AO3-04, RA-AO3-0
   VIR-A

 * 1156+295          11 56 57.786212   * 11 59 31.833913     12 00 28.033628       0.00
   J1159+2914        29 31 25.73868    * 29 14 43.82678      29 08 45.29167        0.00
                     ./gs042_sources.radioastron
                     AGN, MASIV, rfc_2013d Petrov, 2013, unpublished 70591 observations, RA-AO3-04, R



SOURCE SCAN SUMMARY FOR SOURCES LISTED ABOVE

     Scan hours are for recording scans only. 
     Baseline hours are only counted for scans above horizon at both ends.
  Source       Setup file             Frequency sets                  Observing hours
                                   (duplicates not shown)              Scan  Baseline
  FAKERA     ra1cm2.set            9                                 2.783     0.000
  1236+077   ra1cm2.set            1 2 3 6 7 8 11 13 14 15 16  +     0.347    16.742
  1226+023   ra1cm2.set            1 2 3 6 7 8 11 13 14 15 16  +     0.667    51.411
  1253-055   ra1cm2.set            1 2 3 6 7 8 11 13 14 15 16  +     0.597    42.278
  1228+126   ra1cm2.set            1 2 3 6 7 8 11 13 14 15 16  +     8.722   862.110
             ra7mm2.set            30 31 32                          0.350    15.750
  1156+295   ra1cm2.set            1 2 3 6 7 8 11 13 14 15 16  +     0.617    51.640


EFFECT OF SOLAR CORONA

  The solar corona can cause unstable phases for sources too close to the Sun.
  SCHED provides warnings at individual scans for distances less than 10 degrees.
  The distance from the Sun to each source in this schedule is:
    Source         Sun distance (deg) 
   FAKERA              74.5
   1236+077           131.5
   1226+023           132.1
   1253-055           141.6
   1228+126           127.0
   1156+295           111.1

  Barry Clark estimates from predictions by Ketan Desai of IPM scattering sizes 
  that the Sun will cause amplitude reductions on the  longest VLBA baselines 
  at a solar distance of 60deg F^(-0.6) where F is in GHz. 
  For common VLBI bands, this is: 
       327 MHz        117. deg 
       610 MHz         81. deg 
       1.6 GHz         45. deg 
       2.3 GHz         36. deg 
       5.0 GHz         23. deg 
       8.4 GHz         17. deg 
      15.0 GHz         12. deg 
      22.0 GHz          9. deg 
      43.0 GHz          6. deg 

