preparatory operational test will also be conducted involving the exchange of data from all participating stations and the processing of these data at the EIDCs for four days in late June. The Group also discussed the schedule for phase 3, which is the main phase of GSETT-2. To be able to develop the analysis procedures to take full CD/PV.549 13 (Mr, Dahlman, Sweden ) advantage of reported data, in particular the wave-form data, and to enable additional countries - and this is important - to make the necessary preparations, the Group decided to revise the preliminary schedule. The Group now plans to divide the third phase into two parts. The first part consists of one full week of continuous operation of the entire system to be conducted in late autumn, tentatively mid-November, this year. The second and main part of phase 3 will be a full-scale operation for a continuous period of about two months in April and May 1991. Such a schedule, which allows for both intensive testing and careful analysis and evaluation, is considered by the Group to provide the best foundation on which to build a scientifically sound assessment of the proposed system. The Ad hoc Group suggests that, subject to approval by the Conference on Disarmament, its next session should be convened from 30 July to 10 August 1990, in Geneva. The PRESIDENT : I thank the Chairman of the Ad hoc Group of Scientific Experts to Consider International Co-operative Measures to Detect and Identify Seismic Events for introducing the report contained in document CD/981. Does any other delegation wish at this stage to address the progress report of the Ad hoc Group? As is the practice in the Conference, I shall put the recommendations 
**Analysis**
The text appears to be discussing a scientific project related to seismic events and international cooperation, which involves testing and data analysis. The language used is technical and specific to the field of seismology, indicating that the topic is not related to more general areas like economic development, health, or education.

**Category**
Science and technology