Publications
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| ESA SP-1296: ESA's Report to the 36th COSPAR Meeting |
Scientific editor: R. Marsden
Editor: A. Wilson
The report for the 36th COSPAR Meeting covers, as in previous issues, the missions of the Scientific Programme of ESA in the areas of astronomy, Solar System science and fundamental physics. This year's COSPAR meeting will take place only weeks before the end of the SMART-1 mission to the Moon, a technology project that provided the first European look at our natural satellite from lunar orbit.In October of this year, a new mission will be launched: COROT. ESA, together with a number of countries, is contributing to this unique, French-led project that will provide an insight into the interior of the stars, by means of the asteroseismology technique successfully applied by SOHO. COROT will also perform a systematic search for new extrasolar planets using photometric transits.
The record number of ESA Science Programme missions in operation established at the time of the last report was maintained in 2006 (Huygens having been replaced in the list by Venus Express). Eleven different missions, involving 14 operating spacecraft, are providing excellent science to the worldwide scientific community. The Research and Scientific Support Department (RSSD) is responsible for the science operations of these missions and makes every effort to ensure the best possible science return. The Department also supports the realisation of approved projects in all phases of their development. |
| Publication date: 15 Jun 2006 |
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| IUE Spacecraft Operations - Final Report |
The present document describes the mission operations associated with the International Ultraviolet Explorer (IUE) spacecraft in the context of the 18.5 years of orbital operations in the IUE Project which was a collaboration between NASA, ESA and PPARC. In chapter 1 the objectives of the IUE mission, the goals and capabilities of the spacecraft, the payload and the ground segment are described, as well as some examples of the scientific capabilities of the project. The characteristics of the spacecraft, the spacecraft subsystems and the ground observatory control systems are detailed in chapter 2. Chapter 3 lists the main spacecraft events in the course of the 18 years of the duration of the orbital operations. In chapter 4, the IUE orbit and its evolution is described. The most important problems in the spacecraft subsystems are described in Chapter 5 together with the solutions. Special emphasis is given to the different Attitude Control systems associated with the progressive Gyro failures culminating in the One-Gyro control system used during the last six months of orbital operations. In chapter 6, the spacecraft thermal design is described. The three appendixes contain important dates in the area of spacecraft operations:
- Appendix A: Earth shadow seasons
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Appendix B: Orbital corrections (Delta-V's)
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Appendix C: On-Board-Computer malfunctions
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| Publication date: 15 Sep 1997 |
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