JADE-0202
             (Japanese Dynamic Earth observation by VLBI)
                           2002 May. 27-28           
                 Notes prepared by Shinobu Kurihara
                Geographical Survey Institute, Japan

 Nominal Start: 05:00 U.T. on May.27 (day 147)
   name     yyddd-hhmmss  Ka  Ts  Ai  Cc  S3 
   4C39.25  02147-050000|  70  70  70  70  70|
 Nominal Stop : 05:00 U.T. on May.28 (day 148)
   name     yyddd-hhmmss  Ka  Ts  Ai  Cc  S3 
   0454-234 02148-050624| 650 240 764 764 650|

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 via 6 times sessions a year. 

NETWORK
=======
The standard configuration of the JADE projests consists of 
five stations. Shintotsukawa cannot participate winter season session.
Kashima 26m station will be dismantled because it become too old for work. 
After that the network configuration become four stations.

Station:      Code   
Kashima       Ka
Tsukuba       Ts
Aira          Ai
Chichijima    Cc
Shintotsukawa S3

SCHEDULE
========
This schedule was made by S. Kurihara using sked. 

Schedule setup parameters:
   Early start                           20 sec 
   Minimum scan length                   70 sec 
   Maximum scan length                   784 sec
   Minimum SNR                           20 at X-band (margin 3)
                                         15 at S-band (margin 3)

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 20% 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              261 seconds
   Median SNR                       55.0 at X-band
                                    45.0 at S-band
   Number of observations           1363 observations
   Average scans per station        169 scans


FREQUENCY SEQUENCE      
==================
  Name  Code
  JPK4-SX  K4
  Recording mode setup for:
  KASHIMA  TSUKUB32 AIRA     CHICHI10 SINTOTU3
  Mode      Tot.Rate     Tot.BandW   #chan #bits
  C        112.000 Mbits  56.000 MHz   14   1   
  Chan.BW  #Subpasses  Tracks(*fan)  Tot.tracks 
  4.00 MHz      1         14(*0)        14      
  X-band  spanned bw=   360.0 MHz       rms spanned bw=   140.2 MHz
  S-band  spanned bw=    85.0 MHz       rms spanned bw=    33.1 MHz

Actually the K4 recording system has 16 channels but we don't use 
last 2 channels. 


APPENDIX
========
 Average number of obs. per baseline per source (normalized by up-time) =   4.1
 Min =    .0   Max =   22.3 (Baseline Ka-Ts on 1741-038)   RMS =   6.2

 Total time:       1457 minutes ( 24.3 hours).

 Key:     Ka=KASHIMA    Ts=TSUKUB32   Ai=AIRA       Cc=CHICHI10   S3=SINTOTU3
       

                  Ka  Ts  Ai  Cc  S3  Avg
 % obs. time:     70  24  40  69  37  48 
 % cal. time:      2   2   1   2   1   1 
 % slew time:     22   9   4   5  10  10 
 % idle time:      4  63  53  22  50  39 
 # of tapes :     12   5   7  12   7          
 total # scans:  218 218 117 184 112 169 
 # scans/hour :    8   8   4   7   4  7.1
 Avg scan (sec): 284  98 303 329 294 261 

      # OF OBSERVATIONS BY BASELINE

   | Ka  Ts  Ai  Cc  S3   StnTotal 
 ----------------------------------
 Ka|218 218 117 184 112      631 
 Ts|    218 117 184 112      631 
 Ai|        117 108 104      446 
 Cc|            184 107      583 
 S3|                112      435 


 Number of  2-station scans:   25
 Number of  3-station scans:   72
 Number of  4-station scans:   22
 Number of  5-station scans:   99

 Total # of scans, observations:   218    1363


 Average baseline components for all observations
  Average XY     =  678.
  Average XZ     =  792.
  Average YZ     =  836.
  Average length =  959.