Session Notes for RD0802
Prepared by D. Behrend, NVI, Inc./GSFC

===========================================================
PURPOSE AND GENERAL NOTES 
===========================================================

The purpose of rd0802 is to test 512 Mbps recording mode
for possible usage in CONT08. The frequency setting is
basically the R1 mode (256 Mbps) but using 2-bit sampling
instead of 1-bit. The schedule was generated using SNRs
of 40 at X-band and 30 at S-band for all stations but
TIGO. TIGO has SNRs of 20 at X and 15 at S in order to
increase their number of observations. The schedule uses
the 80 best geodetic sources. TIGO has a weight factor
of 5. Ny-Alesund was tagged along.

Kokee Park and Wettzell will observe INT I08051 and join
rd0802 at about 1950 UT. 

An extra 3 seconds is added at the start of each scan for correlator
synchronization. These extra seconds are not included in the 
calculation of the scan SNR.

This session must be recorded on Mk5 disks. Multiple disk
modules may be required. Stations must plan for disk changes 
by referring to the drudg listings that display the number of 
Gb recorded during the experiment. 

===========================================================
Parameter values for experiment RD0802  
Experiment description: R&D-02 2008
Scheduler: dbb          Correlator: HAYSTACK
Nominal start: 2008-051-18:00:00     Nominal end: 2008-052-18:00:00
 Current yyyyddd:    2008051 (2008.14)  ( 14517 MJD, WED. 20FEB.)
 Greenwich sidereal time:    4: 0:12.00 (18: 0: 0 UT)
 Sun's RA and DEC:   22h 14.0m   -10d 57.1
===========================================================
First observations
Observation listing from file ./rd0802.skd  for experiment RD0802  
Source      Start      DURATIONS               
name     yyddd-hhmmss  Kk  Ny  On  Tc  Wf  Wz  
0235+164 08051-180000|     165 305 305 121    |
2136+141 08051-180547|     480     480 299    |
......
0454-234 08051-195003|         215 215      67|
0727-115 08051-195429|          40          40|
2136+141 08051-195442| 161         304 304    |
End of listing.
===========================================================
Last observations
Observation listing from file ./rd0802.skd  for experiment RD0802  
Source      Start      DURATIONS               
name     yyddd-hhmmss  Kk  Ny  On  Tc  Wf  Wz  
......
0454-234 08052-175350|         233 233      71|
1749+096 08052-175436|  40              40    |
0119+115 08052-175845|      43  54      54  40|
End of listing.
===========================================================

   SKED Summary from file ./rd0802.skd for experiment RD0802  

      (all scans with at least one subnet station)


 Average number of obs. per baseline per source(normalized by up-time) =   7.9
 Min =     .0  Max =  135.0 (Baseline Ny-On on 1741-038)   RMS =  12.4

 Total time:       1440 minutes (  24.0 hours).

 Key:     Kk=KOKEE      Ny=NYALES20   On=ONSALA60   Tc=TIGO       Wf=WESTFORD
          Wz=WETTZELL
                  Kk   Ny   On   Tc   Wf   Wz   Avg
 % obs. time:      31   29   51   48   53   31   40 
 % cal. time:       3    4    5    2    5    4    4 
 % slew time:      13   20   26    5   19   13   16 
 % idle time:      52   46   17   44   23   51   40 
 total # scans:   262  336  400  178  390  384  325 
 # scans/hour :    11   14   17    7   16   16   14 
 Avg scan (sec):  103   74  110  231  118   69  116 
 # data tracks:    32   32   32   32   32   32 
 # Mk5 tracks:     32   32   32   32   32   32 
 Total GBytes:   1934 1801 3164 2966 3301 1902 2511 
 Total GB(M5):   1719 1601 2812 2636 2934 1691 2232 
 # of tapes :      .1   .1   .1   .1   .1   .1
 tape change times (hhmm):
                                                                                                                                                                
Total number of tapes:    .9  Total GBytes (M5) recorded: 13393.5
      # OF OBSERVATIONS BY BASELINE 
  |  Kk   Ny   On   Tc   Wf   Wz  StnTotal
----------------------------------------
Kk|      144  133  115  235  136     763      
Ny|           314   61  236  281    1036      
On|                 75  250  359    1131      
Tc|                     169   77     497      
Wf|                          236    1126      
Wz|                                 1089      


 Number of  2-station scans:   60
 Number of  3-station scans:  225
 Number of  4-station scans:  136
 Number of  5-station scans:  103
 Number of  6-station scans:   16

 Total # of scans, observations:   540     2821

===========================================================
Recording mode
  Name  Code 
GEOSX8N  8F
Recording mode setup for:
  KOKEE    NYALES20 ONSALA60 TIGOCONC WESTFORD WETTZELL 
  Mode      Tot.Rate      Tot.BandW  #chan #bits  Barrel
Mk341:2   506.368 Mbits  253.184 MHz   14   2     NONE
 Chan.BW  #Subpasses  Tracks(*fan)  Tot.tracks  Speed
 8.00 MHz      1         16(*2)        32        .01
 X-band spanned bw=   720.0 MHz       rms spanned bw=   280.4 MHz
 S-band spanned bw=   140.0 MHz       rms spanned bw=    50.9 MHz
 Effective number of channels recorded per sub-pass
         X         S         Total
        19.780    11.868    31.648
===========================================================
Tape types
 ID  Station   Tape length         Density         Passes
 Kk  KOKEE    Mark5A  
 Ny  NYALES20 Mark5A  
 On  ONSALA60 Mark5A  
 Tc  TIGOCONC Mark5A  
 Wf  WESTFORD Mark5A  
 Wz  WETTZELL Mark5A
===========================================================
SNR Targets
 Minimum SNR by baseline for multi-baseline scans
     X-band (margin   5)     S-band (margin   3)
     Kk  Ny  On  Tc  Wf          Kk  Ny  On  Tc  Wf  
 Ny  40                      Ny  30
 On  40  40                  On  30  30
 Tc  20  20  20              Tc  15  15  15
 Wf  40  40  40  20          Wf  30  30  30  15
 Wz  40  40  40  20  40      Wz  30  30  30  15  30
======================================================================
DISK MODULE CHANGES
======================================================================
This session will require 1 or 2 disk modules, depending on the sizes
that you have available at your station. DRUDG does not know the
sizes, so it shows an ever-increasing GByte count. Please be aware
that you may have to change modules during this session, and plan
accordingly. 
 
There are a few of things to consider:

1) It is desriable to precondition all modules ahead of time that you
will use for the session. Recording often works better if the modules
have been preconditioned since their last shipment. If you don't have
time to precondition all the modules that are needed, plus one or two
spares, please precondition as many as you can.

2) Mark module change times. Select the modules you will use for this 
session, note their sizes, and then mark by hand the places in the 
schedule where a module change will be necessary, and which bank
will need to be changed. You can use the drudg Option 5 listing 
for this purpose. Unfortunately it is not possible to predict the
module change times exactly. For various reasons, a module can be
finished at a different time, usually earlier than expected. As long
as a module does not end a great deal earlier than expected, this
should not cause a problem.

3) Change modules promptly. When a module is full, the FS will
automatically switch to the next one and put up a notice that you
should change the old one. It is good practice to change the module
as soon as possible after it is called for, because then a new one
is available in case the module in use should end prematurely for
some reason.
 
If you have any questions, please contact Ed Himwich 
(Ed.Himwich@nasa.gov).