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The European X-Ray Astronomy Satellite EXOSAT: Programme Status

The current status of the European X-ray Astronomy Satellite programme, EXOSAT, which includes the payload, spacecraft and ground segment are summarised. Details of the experiment performances and sensitivities are provided. The facilities offered to observers at the EXOSAT Observatory based at the European Space Operations Centre are discussed. The observation programme for the first nine months of the mission has been selected. The technical constraints which influenced the selection of this program are summarised. The various constraints imposed on the selected observation program are examined and trade-offs involved in the mission optimisation are highlighted. Activities associated with the approved observation program from now to launch are presented, in conjunction with the operations associated with the early orbit phase.