  COVER INFORMATION 

 Station:    VLBA_FD   (Code Fd ) 
 Experiment: GL026 VLBA format, 18 cm, Arp 220, Colin Lonsdale, February 2002
 Exp. Code:  GL026   


Schedule Version:       1.00                                              
Processed by SCHED version: 16 Oct. 2001                                  

PI:       Colin Lonsdale                                                  

Address:  MIT Haystack Observatory                                        
          Off Route 40                                                    
          Westford, MA 01886                                              
                                                                          

Phone:    508-692-4764 (work) or 603-672-1268 (home)                      
EMAIL:    cjl@dopey.haystack.edu                                          
Fax:      617-981-0590                                                    
Phone during observation: 508-692-4764 (work) or 603-672-1268 (home)      

Observing mode: 256-8-2                                                   

Notes:    Primary fringe finder 1613+341                                  
                                                                          
                                                                          
                                                                          

Schedule for VLBA_FD   (Code Fd )                                   Page   2
               GL026 VLBA format, 18 cm, Arp 220, Colin Lonsdale, February 2002
  UP:  D => Below limits;  H => Below horizon mask.  blank => Up.
  Early: Seconds between end of slew and start.   Dwell: On source seconds. 
  Tapes: Drive, Index, Start footage / Direction, Head Group, End footage.
  TPStart:  Tape motion start time.  Frequencies are LO sum (band edge).
     Automatic tape allocation specified.  Tape positions are just estimates.
----------------------------------------------------------------------------------------
Start UT  Source               Start / Stop                 Early    Tapes      TPStart
Stop UT                  LST      EL    AZ   HA  UP   ParA  Dwell  (see above)
----------------------------------------------------------------------------------------

 --- Sun  24 Feb 2002   Day  55 ---

 Next scan frequencies:  1640.99  1640.99  1640.99  1640.99  1656.99  1656.99
                         1656.99  1656.99
 Next BBC frequencies:    759.01   759.01   759.01   759.01   743.01   743.01
                          743.01   743.01
 Next scan bandwidths:      8.00     8.00     8.00     8.00     8.00     8.00
                            8.00     8.00

06 00 00  1613+341     09 20 01   7.0  54.1 -6.9     -57.5     0   1  1      0  06 00 00
06 06 00  ---          09 26 02   8.0  54.8 -6.8     -58.2   360   F  1   4800

06 06 00  ARP220       09 26 02   9.9  68.5 -6.2     -60.8   -11   1  1   4800  06 06 00
06 22 00  ---          09 42 04  13.1  70.3 -5.9     -62.0   949   F  1  17600

06 25 00  1613+341     09 45 05  11.4  56.8 -6.5     -60.6   169   1  2  17600  06 25 00
06 28 00  ---          09 48 05  11.9  57.1 -6.4     -60.9   180   R  1  15200

06 28 00  ARP220       09 48 05  14.4  70.9 -5.8     -62.5   -11   1  2  15200  06 28 00
06 47 00  ---          10 07 08  18.3  73.0 -5.5     -63.8  1129   R  1      0

06 50 00  ARP220       10 10 09  18.9  73.3 -5.4     -64.0   177   1  3      0  06 50 00
07 12 00  ---          10 32 12  23.4  75.6 -5.0     -65.3  1320   F  1  17600

07 15 00  ARP220       10 35 13  24.1  75.9 -5.0     -65.5   177   1  4  17600  07 15 00
07 37 00  ---          10 57 17  28.7  78.2 -4.6     -66.7  1320   R  1      0

07 40 00  ARP220       11 00 17  29.3  78.5 -4.6     -66.9   177   1  5      0  07 40 00
08 02 00  ---          11 22 21  34.0  80.8 -4.2     -67.9  1320   F  1  17600

08 10 00  1516+193     11 30 22  38.0  88.3 -3.8     -65.9   470   1  6  17600  08 10 00
08 13 00  ---          11 33 22  38.7  88.6 -3.7     -65.9   180   R  1  15200

08 13 00  ARP220       11 33 22  36.4  82.0 -4.0     -68.3    -7   1  6  15200  08 13 00
08 32 00  ---          11 52 26  40.4  84.0 -3.7     -68.9  1133   R  1      0

08 35 00  ARP220       11 55 26  41.1  84.3 -3.7     -69.0   177   1  7      0  08 35 00
08 57 00  ---          12 17 30  45.8  86.8 -3.3     -69.5  1320   F  1  17600

09 00 00  ARP220       12 20 30  46.4  87.2 -3.2     -69.6   177   1  8  17600  09 00 00
09 22 00  ---          12 42 34  51.2  89.8 -2.9     -69.8  1320   R  1      0

09 25 00  ARP220       12 45 34  51.8  90.2 -2.8     -69.8   177   1  9      0  09 25 00
09 47 00  ---          13 07 38  56.6  93.2 -2.5     -69.5  1320   F  1  17600
Schedule for VLBA_FD   (Code Fd )                                   Page   3
               GL026 VLBA format, 18 cm, Arp 220, Colin Lonsdale, February 2002
  UP:  D => Below limits;  H => Below horizon mask.  blank => Up.
  Early: Seconds between end of slew and start.   Dwell: On source seconds. 
  Tapes: Drive, Index, Start footage / Direction, Head Group, End footage.
  TPStart:  Tape motion start time.  Frequencies are LO sum (band edge).
     Automatic tape allocation specified.  Tape positions are just estimates.
----------------------------------------------------------------------------------------
Start UT  Source               Start / Stop                 Early    Tapes      TPStart
Stop UT                  LST      EL    AZ   HA  UP   ParA  Dwell  (see above)
----------------------------------------------------------------------------------------

 --- Sun  24 Feb 2002   Day  55 ---

09 50 00  1516+193     13 10 38  59.4 103.8 -2.1     -62.4   171   1 10  17600  09 50 00
09 56 00  ---          13 16 39  60.7 105.1 -2.0     -61.8   360   R  1  12800

09 56 00  ARP220       13 16 39  58.5  94.6 -2.3     -69.3    -9   1 10  12800  09 56 00
10 12 00  ---          13 32 42  61.9  97.2 -2.0     -68.5   951   R  1      0

10 15 00  ARP220       13 35 43  62.6  97.8 -2.0     -68.4   177   1 11      0  10 15 00
10 37 00  ---          13 57 46  67.3 102.4 -1.6     -66.4  1320   F  1  17600

10 40 00  ARP220       14 00 47  67.9 103.1 -1.6     -66.0   177   1 12  17600  10 40 00
11 02 00  ---          14 22 50  72.4 109.6 -1.2     -62.1  1320   R  1      0

11 05 00  1613+341     14 25 51  67.0  73.9 -1.8     -91.4   154   1 13      0  11 05 00
11 08 00  ---          14 28 51  67.6  73.9 -1.7     -91.9   180   F  1   2400

11 08 00  ARP220       14 28 51  73.7 111.9 -1.1     -60.5   -27   1 13   2400  11 08 00
11 27 00  ---          14 47 54  77.3 121.4 -0.8     -53.2  1113   F  1  17600

11 30 00  ARP220       14 50 55  77.9 123.4 -0.7     -51.6   177   1 14  17600  11 30 00
11 52 00  ---          15 12 58  81.3 144.2 -0.4     -33.3  1320   R  1      0

-----------  Tape Change ------------

12 10 00  1613+341     15 31 01  80.3  65.6 -0.7    -108.7  1026   2  1      0  12 10 00
12 13 00  ---          15 34 02  80.9  64.3 -0.7    -110.3   180   F  1   2400

12 13 00  ARP220       15 34 02  82.9 178.1  0.0      -1.7   -78   2  1   2400  12 13 00
12 32 00  ---          15 53 05  81.8 210.4  0.3      28.4  1062   F  1  17600

12 35 00  ARP220       15 56 06  81.5 214.5  0.4      32.1   175   2  2  17600  12 35 00
12 57 00  ---          16 18 09  78.0 235.9  0.7      51.0  1320   R  1      0

13 00 00  ARP220       16 21 10  77.5 237.9  0.8      52.7   177   2  3      0  13 00 00
13 22 00  ---          16 43 13  73.3 248.9  1.1      61.1  1320   F  1  17600

13 25 00  ARP220       16 46 14  72.6 250.0  1.2      61.8   177   2  4  17600  13 25 00
13 47 00  ---          17 08 17  68.1 256.6  1.6      65.9  1320   R  1      0

13 50 00  1613+341     17 11 18  77.4 290.2  1.0     102.4   156   2  5      0  13 50 00
13 53 00  ---          17 14 18  76.7 289.6  1.0     101.4   180   F  1   2400

13 53 00  ARP220       17 14 18  66.8 258.1  1.7      66.6   -23   2  5   2400  13 53 00
14 12 00  ---          17 33 21  62.8 262.0  2.0      68.3  1117   F  1  17600
Schedule for VLBA_FD   (Code Fd )                                   Page   4
               GL026 VLBA format, 18 cm, Arp 220, Colin Lonsdale, February 2002
  UP:  D => Below limits;  H => Below horizon mask.  blank => Up.
  Early: Seconds between end of slew and start.   Dwell: On source seconds. 
  Tapes: Drive, Index, Start footage / Direction, Head Group, End footage.
  TPStart:  Tape motion start time.  Frequencies are LO sum (band edge).
     Automatic tape allocation specified.  Tape positions are just estimates.
----------------------------------------------------------------------------------------
Start UT  Source               Start / Stop                 Early    Tapes      TPStart
Stop UT                  LST      EL    AZ   HA  UP   ParA  Dwell  (see above)
----------------------------------------------------------------------------------------

 --- Sun  24 Feb 2002   Day  55 ---

14 15 00  ARP220       17 36 22  62.2 262.6  2.0      68.5   177   2  6  17600  14 15 00
14 37 00  ---          17 58 26  57.4 266.2  2.4      69.4  1320   R  1      0

14 40 00  ARP220       18 01 26  56.8 266.6  2.4      69.5   177   2  7      0  14 40 00
15 02 00  ---          18 23 30  52.0 269.7  2.8      69.7  1320   F  1  17600

15 05 00  ARP220       18 26 30  51.4 270.0  2.9      69.8   177   2  8  17600  15 05 00
15 27 00  ---          18 48 34  46.7 272.7  3.2      69.6  1320   R  1      0

15 30 00  1613+341     18 51 34  56.7 286.8  2.6      85.0   158   2  9      0  15 30 00
15 36 00  ---          18 57 35  55.5 287.0  2.7      84.3   360   F  1   4800

15 36 00  ARP220       18 57 35  44.7 273.8  3.4      69.4   -24   2  9   4800  15 36 00
15 52 00  ---          19 13 38  41.3 275.5  3.6      69.0   936   F  1  17600

15 55 00  ARP220       19 16 38  40.6 275.9  3.7      69.0   177   2 10  17600  15 55 00
16 17 00  ---          19 38 42  35.9 278.2  4.1      68.2  1320   R  1      0

16 20 00  ARP220       19 41 42  35.3 278.5  4.1      68.1   177   2 11      0  16 20 00
16 42 00  ---          20 03 46  30.6 280.8  4.5      67.1  1320   F  1  17600

16 45 00  ARP220       20 06 47  30.0 281.1  4.5      67.0   177   2 12  17600  16 45 00
17 07 00  ---          20 28 50  25.3 283.4  4.9      65.9  1320   R  1      0

17 10 00  1613+341     20 31 51  36.3 292.0  4.3      74.6   156   2 13      0  17 10 00
17 13 00  ---          20 34 51  35.7 292.3  4.4      74.3   180   F  1   2400

17 13 00  ARP220       20 34 51  24.1 284.1  5.0      65.5   -25   2 13   2400  17 13 00
17 32 00  ---          20 53 54  20.1 286.0  5.3      64.4  1115   F  1  17600

17 35 00  ARP220       20 56 55  19.5 286.4  5.4      64.2   177   2 14  17600  17 35 00
17 57 00  ---          21 18 58  15.0 288.7  5.7      62.7  1320   R  1      0


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


 Setup file: v18cm-256-8-2-UL.set
   Matches group v20cm_2 in /home/cjl/sched/catalogs/freq.dat
    FD filtered above 1760.  SC filtered above 1740.

   Setup group:    7         Station: VLBA              Total bit rate:  256
   Format: VLBA1:2           Bits per sample: 2         Sample rate: 16.000
   Number of channels:  8    Passes/head pos:   1       Speedup factor:   1.00

   Tape speeds: Low density - 266.660 ips,  High density - 160.00 ips
   Time per pass for  17600 ft, High density tapes is: 00:22:00

   1st LO=   2400.00   2400.00   2400.00   2400.00   2400.00   2400.00   2400.00   2400.00
   Net SB=         L         L         U         U         L         L         U         U
   Pol.  =      RCP       LCP       RCP       LCP       RCP       LCP       RCP       LCP 
   BBC   =         1         2         1         2         3         4         3         4
   BBC SB=         U         U         L         L         U         U         L         L
   IF    =        A         C         A         C         A         C         A         C 

   VLBA FE=     20cm     omit     20cm     omit
   VLBA Synth=  15.4      2.4     15.4

  The following frequency sets based on this setup were used.

   Frequency Set:   7  Setup file default.  Used pcal sets:   1
   LO sum=    1640.99   1640.99   1640.99   1640.99   1656.99   1656.99   1656.99   1656.99
   BBC fr=     759.01    759.01    759.01    759.01    743.01    743.01    743.01    743.01
   Bandwd=      8.000     8.000     8.000     8.000     8.000     8.000     8.000     8.000

  The following pulse cal sets were used with this setup:

   Pulse cal detection set:   1  PCAL = 1MHZ
    PCALXB1=   S1    S3    S5    S7    S1    S3    S5    S7 
    PCALXB2=   S2    S4    S6    S8    S2    S4    S6    S8 
    PCALFR1=   990    10   990    10  6990  6010  6990  6010
    PCALFR2=   990    10   990    10  6990  6010  6990  6010

   Track assignments are: 
    track1=   2, 10, 18, 26,  3, 11, 19, 27
    barrel=roll_auto
 SOURCE LIST -- GL026 VLBA format, 18 cm, Arp 220, Colin Lonsdale, February 2002
     Catalog positions marked with *. 
     Precession of date coordinates is based on stop time of first scan.
     Names used in schedule marked with *. 
     Short names used in VLA and SNAP files marked with +. 
     Observation date used in B1950/J2000 coordinate conversion (PRECDATE):  1979.900
     No adjustments are made for rates (DRA, DDEC).

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

 * ARP220            15 32 46.880196   * 15 34 57.224670     15 35 02.234275 
                     23 40 07.99276    * 23 30 11.56400      23 29 34.29131 
                     From catalog imbedded in main SCHED input file.

 * 1516+193          15 14 40.987286   * 15 16 56.797600     15 17 02.105002 
                     19 43 10.96935    * 19 32 13.01900      19 31 34.69479 
                     From catalog imbedded in main SCHED input file.

 * 1613+341          16 11 47.914510   * 16 13 41.064500     16 13 45.209052 
                     34 20 19.83496    * 34 12 47.91000      34 12 13.22804 
                     From catalog imbedded in main SCHED input file.

 * 1308+326          13 08 07.560281   * 13 10 28.664000     13 10 34.957070 
                     32 36 40.24093    * 32 20 43.78500      32 19 54.75102 
                     From catalog imbedded in main SCHED input file.

 * 3C286             13 28 49.657708   * 13 31 08.288000     13 31 14.365510 
                     30 45 58.64136    * 30 30 32.96000      30 29 44.60827 
                     From catalog imbedded in main SCHED input file.



  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) 
   ARP220             106.2
   1516+193           110.1
   1613+341            98.5
   1308+326           136.4
   3C286              132.8

  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 

