Seshen25 station report for TOG meeting
            (September 2008)

1. Observations

	-In EVN-session 1, Sheshan station comprised 5 experiments at 18cm, 4 experiments at 6cm,
	 4 experiments at 1.3cm. The fringes were found in all observations.
	-In EVN-session 2, Sheshan station comprised 8 experiments at 18cm, 5 experiments at 6cm,
	 4 experiments at 1.3cm. During the N08C2 FTP fringes test observation, the receiver
	 was unlocked due to missing the 100MHz reference signal from the H-maser.
         The others observations were successfull.
	-From January to September this year, Sheshan station joined 14 GEO observations for IVS NASA.
	-After Chinese Chang'E-1 satellite surrounded the moon last November, Sheshan station has
         scheduled two days' VLBI tracking observations every week.  
              
2. Mark 5A

	-Two 4TB(500GB*8) modules recording disks have been ordered, and will be added to next session.  

4. Field System 

	-It is running the 9.10.3 version now.
 
5. e-VLBI

	-Shanghai Astronomical Observatory held the 7th International eVLBI Workshop on June 16~17 this year.
	 A total of 87 participants from 11 countries joined this meeting. The workshop featured two e-VLBI
         demonstrations. One is e-CVN demo which involved the Chinese four VLBI telescopes(Sheshan 25m, 
         Urumqi 25m, Beijing 50m, and Kunming 40m) and the correlators at SHAO. The other is e-APT demo which
         involved Sheshan 25m(SHAO), Kashima 34m(NICT), Parkes 64m(ATNF), Mopra 22m(ATNF), ATCA 5x22m(ATNF),
         and the DiFX software correlator at Parkes. A number of AGNs and a recent gama-ray burst were observed.

6. On-going project 

	-The prototype of chinese DBBC has been finished in this August. The basic features are 4 IF AGC
         channels(either 10~512MHz or 512~1024MHz as input signal), 2GHz sampling rate per second, 
         0.5/1/2/4/8/16MHz base-band bandwidth, 32 data channels, 1/2/4bit data fan-out, VSI and MK4 standard interface. 
	 The Chinese DBBC will be equipped to Sheshan and Urumqi stations at the end of this year, 
         and more VLBI tests will be done.
	-Holographic measurement for the antenna panels adjusting at Sheshan station will be done
	 in the middle of next year.
	



Bin Li