JADE-0405
             (Japanese Dynamic Earth observation by VLBI)
                           2004 May 20-21           
                 Notes prepared by tbd
                Geographical Survey Institute, Japan


Session 
Start 2004-141 02:00:00 May 20
End   2004-142 01:56:00 May 21
Stations  4
Ts  TSUKUB32  T
Ai  AIRA      A
Cc  CHICHI10  C
S3  SINTOSU3  J

Duration:      24 hours
Correlator:    TSUKUBA(GSI)
 
PURPOSE
=======
The purpose of the JADE sessions is to monitor the plate motion and 
the local crustal movement around Japan. 
In 2004 fiscal year, JADE session will be carried out once a month. 

NETWORK
=======
The standard configuration of the JADE projests consists of 
four stations. 

Station:      Code   
Tsukuba       Ts
Aira          Ai
Chichijima    Cc
Shintotsukawa S3


SCHEDULE
========
This schedule was made by tbd using sked. 

Schedule setup parameters:
   Early start                     0 sec 
   Corr. tape sync time            30 sec 
   Minimum scan length             100 sec 
   Maximum scan length             784 sec
 Minimum SNR by baseline for multi-baseline scans
     X-band (margin   5)     S-band (margin   5)
     Ts  Ai          Ts  Ai  
 Ai  19          Ai  19
 S3  15   0      S3  15   0

Automatic scheduling setup: 
   optimize for uniform sky coverage at all stations,
   maximize the number of observations,
   minimize slewing time, 
   minimize time between scans, 
   consider the top 30% of ranked scans for selection, 
   consider the last 4 hour of scans for sky coverage calculations,
   minimum 30 min between scans on the same source.


The characteristics of the generated schedule are listed below. 
These will vary slightly for each schedule that is generated. 

Schedule characteristics:
   Average scan length               seconds
   Median SNR                        20 at X-band
                                     20 at S-band
   Number of observations           698 observations
   Average scans per station         scans

FREQUENCY SEQUENCE      
==================

Chann#   Band    Skyfreq(MHz)     LOfreq(MHz)
   1       x       8209.99         7680.0  
   2       x       8219.99         7680.0  
   3       x       8249.99         7680.0  
   4       x       8309.99         7680.0  
   5       x       8419.99         7680.0  
   6       x       8499.99         7680.0  
   7       x       8549.99         7680.0  
   8       x       8569.99         7680.0  
   9       s       2239.99         1600.0  
  10       s       2244.99         1600.0  
  11       s       2259.99         1600.0  
  12       s       2289.99         1600.0  
  13       s       2319.99         1600.0  
  14       s       2329.99         1600.0  
  15       s       2344.99         1600.0  
  16       s       2354.99         1600.0  
 
APPENDIX
========

   SKED Summary from file /corr/users1/schedule/skd_files/jd0405.skd for experiment         

      (all scans with at least one subnet station)


 Average number of obs. per baseline per source (normalized by up-time) =   4.0
 Min =    .0   Max =   20.0 (Baseline Ts-Ai on 1741-038)   RMS =   5.5

 Total time:       1441 minutes ( 24.0 hours).

 Key:     Ts=TSUKUB32   Ai=AIRA       S3=SINTOTU3

                  Ts   Ai   S3   Avg
 % obs. time:      78   37   71   62 
 % cal. time:       2    2    2    2 
 % slew time:      10    7   16   11 
 % idle time:       7   52    9   23 
 total # scans:   254  252  224  243 
 # scans/hour :    10   10    9 10.1
 Avg scan (sec):  268  127  276  223 
 Total GBytes:   1226  579 1113  972 
 # of tapes :    12.0  6.0 11.0
 tape change times (hhmm):
                 0418 0614 0418 
                 0626 1029 0653 
                 0828 1512 0910 
                 1029 1953 1139 
                 1227 0022 1352 
                 1435 0000 1617 
                 1647 0000 1824 
                 1852 0000 2039 
                 2046 0000 2245 
                 2249 0000 0051 

      # OF OBSERVATIONS BY BASELINE

   | Ts  Ai  S3   StnTotal 
 --------------------------
 Ts|254 252 224      476 
 Ai|    252 222      474 
 S3|        224      446 


 Number of  2-station scans:   32
 Number of  3-station scans:  222

 Total # of scans, observations:   254     698