SADISOPSG/8-IP/3

26/6/03

SATELLITE DISTRIBUTION SYSTEM OPERATIONS GROUP (SADISOPSG)

EIGHTH MEETING

Bangkok, Thailand, 7 to 10 July 2003

Agenda Item	4:	Development of the SADIS

NEED FOR NEW RECEIVERS OF THE SECOND GENERATION

(Presented by Ukraine)

SUMMARY
This paper addresses the current status of the function of both receivers in Ukraine.

1.	INTRODUCTION

1.1	Our enterprise UkSATSE on behalf of Ukraine supposed to participate in test of new second generation receiver as it was offered on SADISOPSG/7 (IP/6, WP/22, Report). Unfortunately for the reasons independent of us we could not take part in tests. However, we hope that new more reliable receivers will soon become available to the users of system SADIS.

1.2	In 2003 UkSATSE has entered completely into operation system SADIS in ACC Kiyv despite of proceeding difficulties with operation of the old receivers. We have begun to observe strange failures in activity of receivers approximately once per day after transition of the broadcasting to a new satellite in the April 2002.

1.3	The firm WSI which delivered to us these receivers and software has undertaken investigation because in a structure of their equipment two similar receivers appeared to have the same problems.

1.4	As a result of joint long efforts of WSI and Astrium it was found out that in some exemplars of receivers the configuration of FRAD card permit to have a reception of the information to others PVC which resulted in overflow of the buffer and caused a stop of the receiver approximately in 15 hours after its activation.

1.5	This problem disappears after correction of errors in a configuration of the receiver. But such corrections can be made only in Astrium laboratory that requires dispatch of the receiver to their address.

1.6	Then problems begin again. We have sent one from our receivers in the beginning of April, 2003. Till now (June 23) it passes testing and firm WSI can not obtain the information from Astrium about the date of its readiness. We still should correct a configuration of the second receiver too.

2.	DISCUSSION

2.1	On the previous meeting, SADISOPSG/7, in Cairo we were informed by SADIS Provider State that the old receivers will be supported by Astrium no more than 1 or 2 years. In this connection UK Met Office began the project of transition to new model of the receiver and also to a new carrier frequency because the new method of carrier modulation QPSK in difference from an old method MSK will be used.

2.2	Obviously, that after successful result of test of the new receiver, the need for its purchase and replacement of old receivers will arise absolutely for all consumers SADIS.

2.3	It is very important for all of us as for consumers to obtain from SADIS Provider State such information:

—	When will be a capability to purchase the receiver of the second generation?

—	Who will organize the sale of the receiver of the second generation?

—	What will be the price of this receiver?

—	What will be the conditions of its maintenance service (repair, replacement)?

—	What interfaces will be at this receiver (X.25, TCP/IP)?

3.	CONCLUSION

3.1	We think that the SADIS Provider State will present the necessary information on new receivers to the users as soon as possible.

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