  COVER INFORMATION 

 Station:    GBT_VLBA  (Code Gb ) 
 Experiment: M81 jet fine-structure imaging
 Exp. Code:  EB055D  


Schedule Version:       0.90
Processed by SCHED version:  11.40  Release 11.4.  March 14, 2015

PI:       M. Bietenholz

Address:  Hartebeesthoek Radio Astronomy Observatory
          PO Box 443, Krugersdorp 1740
          South Africa
 

Phone:    +79165452842
EMAIL:    michael@hartrao.ac.za, mbieten@yorku.ca
Fax:
Phone during observation: +79165452842

Observing mode: L-band, dual-pol

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

Schedule for GBT_VLBA  (Code Gb )                                   Page   2
               M81 jet fine-structure imaging
  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
----------------------------------------------------------------------------------------

 --- Sat   9 Apr 2016   Day 100 ---

 ---------- 10-min scan for GBT to do POINTING ----------

 Next scan frequencies:  1668.00  1668.00  1668.00  1668.00
 Next BBC frequencies:    732.00   732.00   732.00   732.00
 Next scan bandwidths:     16.00    16.00    16.00    16.00

00 49 00  0954+658     08 40 27  60.6  16.7 -1.3    -147.1     0        0   Stopped 
00 59 00  ---          08 50 29  61.1  14.9 -1.2    -151.0   600        0           

 ---------- Space-ground segment 01: EB055D fringe finder ----------

01 00 00  0954+658     08 51 29  61.2  14.7 -1.1    -151.4    39        0   01 00 00
01 11 00  ---          09 02 31  61.7  12.5 -1.0    -155.8   660       21   01 00 01

 ---------- ground only scan:  EB055D M81 ----------

01 11 30  0951+693     09 03 01  58.6   9.2 -0.9    -159.5    -6       21   01 11 36
01 14 30  ---          09 06 02  58.7   8.7 -0.8    -160.6   174       27   01 11 31

 ---------- Space-ground segment 01: EB055D M81 ----------

01 15 00  0951+693     09 06 32  58.7   8.6 -0.8    -160.8     9       27   01 15 00
01 33 20  ---          09 24 55  59.1   5.6 -0.5    -167.7  1100       62   01 15 01

01 33 50  0951+693     09 25 25  59.1   5.5 -0.5    -167.9     9       62   01 33 50
01 52 40  ---          09 44 18  59.4   2.2 -0.2    -175.2  1130       99   01 33 51

01 53 10  0951+693     09 44 48  59.4   2.1 -0.2    -175.3     9       99   01 53 10
02 12 00  ---          10 03 41  59.4  -1.2  0.1     177.4  1130      135   01 53 11

02 12 30  0951+693     10 04 11  59.4  -1.3  0.1     177.2     9      135   02 12 30
02 31 20  ---          10 23 04  59.2  -4.6  0.4     169.9  1130      171   02 12 31

02 31 50  0951+693     10 23 34  59.2  -4.7  0.4     169.8     9      171   02 31 50
02 50 40  ---          10 42 27  58.8  -7.9  0.8     162.6  1130      208   02 31 51

02 51 10  0951+693     10 42 57  58.8  -7.9  0.8     162.4     9      208   02 51 10
03 10 00  ---          11 01 50  58.2 -11.0  1.1     155.4  1130      244   02 51 11


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


 ======== Setup file: ra18cm2.set
   Matching groups in ./eb055d_freq.dat:
     g20cm_2         LO1=4.632, LO2=12.732, LO3=10.5

   Setup group:    1         Station: GBT_VLBA          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=   2400.00   2400.00   2400.00   2400.00
   Net SB=         L         L         U         U
   IF SB =         L         L         L         L
   Pol.  =      RCP       LCP       RCP       LCP 
   BBC   =         1         2         3         4
   BBC SB=         U         U         L         L
   IF    =        A         C         A         C 

  The following frequency sets based on these setups were used.

   Frequency Set:  13  Setup file default.  Used with PCAL = 1MHz
   LO sum=   1668.00  1668.00  1668.00  1668.00
   BBC fr=    732.00   732.00   732.00   732.00
   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=     731.99    731.99    732.01    732.01
   CRD bw=      16.00     16.00     16.00     16.00
    Matching frequency sets:  13

   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 56.222953       0.00
                     85 16 41.77889    * 85 00 00.00000      84 54 41.27366        0.00
                     From catalog imbedded in main SCHED input file.
                     fake circumpolar target for a TS to look at

 * 0951+693          09 51 27.310821   * 09 55 33.173065     09 56 52.909809       0.00
   J0955+6903        69 18 08.14417    * 69 03 55.06083      68 59 23.26210        0.00
   M81               ./eb055d_sources.radioastron
                     rfc_2013d Petrov, 2013, unpublished 3429 observations, RA-AO3-07

 * 0954+658          09 54 57.847936   * 09 58 47.245116     10 00 01.757596       0.00
   J0958+6533        65 48 15.53882    * 65 33 54.81801      65 29 19.89276        0.00
                     ./eb055d_sources.radioastron
                     AGN, rfc_2013d Petrov, 2013, unpublished 13350 observations, fringe-finder and c



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     ra18cm2.set           14                                2.058     0.000
  0951+693   ra18cm2.set           1 2 3 4 5 6 7 8 9 10 11 12  +     2.558   151.635
  0954+658   ra18cm2.set           1 2 3 4 5 6 7 8 10 11 12 13       0.342    18.717


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              87.2
   0951+693            96.2
   0954+658            98.8

  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 

