A. Observation satellites
1. The role of observation satellites
40. Observation satellites are used, inter alia, for:
- environmental monitoring;
- monitoring of potential crisis areas;
- anticipation of crises;
- planning of operations;
- monitoring the implementation of treaties.
2. Types of observation satellites
41. There are radar and/or optical programmes, using one or several satellites. Some programmes are exclusively military, while others are designed for both military and civilian applications.
42. Let us recall that while optical satellites offer good image definition (Helios-2 will have resolution of less than one metre), they are at the mercy of the weather, in other words, of cloud cover. Conversely, radar sensors can pierce the cloud layer and also distinguish among different materials (microwave radiometry reveals contrast6), making them more effective than optical systems despite resolution that is often lower.
43. The most recent programmes are less costly than those of a decade ago, because they are based on satellite platforms which can be produced in small series and then adapted to specific payloads (varied nature of space activities).
44. In parallel, there is a trend in industry, for obvious reasons of cost, towards clusters of mini-satellites which can be produced in small series, are lighter and provide redundancy should one satellite fail.
3. Programmes
(a) Military optical programme based on the Helios-2 heavy satellite
45. The Franco-German Horus programme has been abandoned. Helios-2 is under development by France and Spain (Matra Marconi and Alcatel Space).
46. France takes the view that the satellite sector is essential for Europe. During the operation launched in 1991 against Iraq by the US-led coalition of allies, the Europeans often complained about being "blind and deaf". Since then they have acquired Helios, which gives them a degree of autonomy in their assessment of developments, for example in Kosovo. However, Helios does not put European capabilities on a par with those of the Americans. Hence Helios-2, with an estimated lifetime of 10 years, is due to come on stream in 2003.
47. Helios-2 is an optical satellite programme with resolution which will certainly be less than one metre (an estimated 50 cm) and for the moment it is funded by the French Government. Spain has a 3% to 6% participation in the total budget (approximately 75 million euros, including the ground station). 2.5% to 3% is the threshold for any worthwhile participation in Helios-2, since at that level a daily average of three to four images can be acquired. This threshold is somewhat high, since Belgium is willing to contribute to a European programme but cannot for the moment exceed 1% (roughly one image a day).
48. The design of Helios-2 seems at first sight to be less attractive than that of other programmes presented further on in this report. Indeed, the programme is based on a single heavy satellite (some 2 500 kg), while competitors are moving towards small clusters of lightweight satellites. Helios-2 owes its large size to the numerous improvements it offers compared to the first generation of satellites (Helios-1A and 1B, scheduled for launch in November 1999), such as the two telescopes it will carry in order to increase the number of frames and an infrared channel. Moreover, in addition to its considerably enhanced resolution, it will offer an optimised image acquisition and processing system in order to reduce lead times.
(b) The CNES programme: 3S-Spot follow-on system
49. The Spot family of satellites was developed by France's Centre National d'Etudes Spatiales (CNES). Spot is a commercial observation satellite programme (the equivalent of Landsat in the US). The latest satellite, Spot-4, was launched on 23 March 1999. CNES is currently working on the next generations, Spot-5 and 3S (Spot follow-on). The ground resolution of Spot-5 will be some 4 metres in panchromatic mode and 10 metres in multispectral mode. It is due to be launched in late 2001 or early 2002. While Spot-5 will offer much higher resolution than Spot-4, it will still not be sufficient for a precise analysis of materials, in the case of vehicles, for example.
50. The 3S satellite will certainly be of considerable interest to the Satellite Centre, since it will be the first new-generation satellite developed by CNES to have been designed to be less costly. A 3S satellite will cost approximately _30 million (compared to some _400 million for a Spot-4 or Spot-5 satellite). Two 3S satellites would offer an equivalent performance to that of one Spot-5 satellite. The mass of a 3S satellite will be only 500 kg, against 2 500 kg for a Spot-4 or Spot-5 satellite. The first 3S launch is scheduled for 2003.
(c) Germany and the United Kingdom: TerraSAR
51. The TerraSAR programme is being developed by Matra Marconi Space UK and Dornier Satellitensysteme GmbH (DASA). TerraSAR (SAR: synthetic aperture radar) is a sun-synchronous satellite orbiting at an altitude of 600 km. The prime contractors estimate its life span at five years. Its maximum resolution will be 1.5 metres and its launch is scheduled for 2004. The Satellite Centre would be a major client for the TerraSAR programme. Hence MMS and DASA are contemplating setting up a ground station in the Satellite Centre for direct reception of data, as well as a high bit-rate connection between the Centre and the TerraSAR HQ in Spitzberg, in order to provide redundancy in the supply of images and rapid access to archives. TerraSAR could not be programmed by the Centre, which means that in exchange for its investment in the programme, it will receive a service. It could nonetheless be one of this programme's most important customers.
(d) Italy: programme based on a cluster of mixed optical/radar satellites: SkyMed/COSMO
52. The SkyMed/COSMO (Constellation of small satellites for Mediterranean basin observation) programme is composed of three optical and four radar-sensing satellites and funded by the Italian Space Agency (ASI). Finmeccanica's subsidiary Alenia Aerospazio is the prime contractor.
53. Each satellite in the constellation will have a mass of some 600 kg. The orbit will be sun-synchronous (480 km altitude for radar satellites, 500 km for optical satellites). The maximum resolution of the optical component will be 2.5 metres. According to ASI, the high-resolution radar images provided by SkyMed/COSMO would be an excellent complement to the optical images from Helios. The estimated cost of the programme is about _565 million for ASI. The first satellite is due to be launched in 2003 and the constellation should be operational by 2004.
54. Thus SkyMed/COSMO is particularly noteworthy for the performance of its radar component. Indeed, Alenia is currently working on the development of the SAR-2000 radar to be flown on four of the satellites in the constellation. It should offer metric resolution, making it a very effective tool for the Satellite Centre as a complement to the high optical resolution of Helios. ASI is exploring the possibility of collaboration with Germany for the development of SAR-2000, given the similarities it bears with the latter's SAR Lupe project.
55. Italian officials are seeking partners in Europe. As we have seen, SkyMed/COSMO's radar component would be complementary to the Helios optical satellites. Cooperation with France on SkyMed/COSMO would certainly be useful. Indeed, with the Helios optical systems and the SkyMed/COSMO radar systems, all the advanced satellite imaging technologies would be available in Europe. Spain and Greece have shown an interest in this programme, but do not seem for the moment to be contemplating financial participation.
56. It was envisaged from the beginning of the SkyMed/COSMO programme to open it up to other European partners. Each partner would exercise independent management. The constellation system would give each party in possession of a receiver station direct access to images.
57. As far as potential customers for SkyMed/COSMO are concerned, Italian officials are realistic, pointing out that there is no proven market for this type of earth observation programme7 which is destined essentially for government administrations.
(e) Future national programmes
58. EagleEye is a high-resolution optical sensor programme developed by Dornier Satellitensysteme GmbH (a DASA subsidiary). It will offer resolution of about 1.5 metres from an altitude of approximately 500 km. It developed directly out of DLR's VHRC (Very High-Resolution Camera) programme designed for the Mars 96 mission. It will become operational in 2002 and will certainly be flown on some of the satellites of the RapidEye programme described below.
59. The prime contractor for the RapidEye programme is Kayser Threde GmbH. RapidEye AG, a legal entity in its own right, has been set up to promote this programme. Like SkyMed/COSMO, it involves a constellation of small satellites (8-10 satellites with a mass of less than 500 kg) which communicate with each other so that each is able, at any moment, to receive images from any of the other satellites and relay them to the nearest ground station without having to wait for the satellite to pass over the ground station (ring concept). For the moment there has been no firm decision concerning the sensors to be flown on the RapidEye satellites. Some of them will certainly be EagleEye sensors, although no precise information is as yet available. However, whether or not this is the case, RapidEye should not offer resolution of less than approximately 5 to 8 metres.
60. The German Defence Ministry has isued an invitation to tender for a small radar satellite programme called SAR Lupe. The SAR Lupe study project is not for the moment open to other countries. The German Government will contact foreign firms once the results of the study are available (end 1999). The aim of the study is to prove that the new satellite technologies (small, series-produced satellite platforms) make for considerable savings as compared, for example, with the estimated cost of the Horus programme based on a large, customised platform. The two German companies carrying out the SAR Lupe study are Dornier Satellitensysteme GmbH (DASA) and OHB-System GmbH.
61. The ISHTAR programme developed by the Spanish Space Agency (INTA) uses the platform developed for MINISAT 01. ISHTAR is defined as an optical satellite programme dedicated to defence missions in a national and international framework. The satellites will have an approximate mass of 450 kg. ISHTAR will fly in sun-synchronous orbit at an altitude of 500 km. The sensors installed on the satellites will pick up optical images with metric resolution and infrared images with a resolution of 10 metres. Access to ISHTAR images will be available in a maximum of 12 hours. According to INTA, the system should be operational in 2003 and cost less than _95 million.
(f) ESA: the desire to coordinate European civil-military programmes
62. In the framework of its Earth Observation Envelope Programme (EOEP: _1330 million for the period 1999-2003), ESA will be promoting a satellite platform (Earthwatch, essentially a commercial project) which will certainly also be able to fly military payloads.
(g) NATO
63. Use of images and analyses provided by the Americans (from the Keyhole and Lacrosse satellites).
4. Which partnerships can be envisaged in Europe?
64. There is a possibility of agreement between France and Italy on the SkyMed/COSMO programme. The advantages of this programme are its modularity and radar capability. It could therefore function initially in a radar configuration, thanks to its complementarity with the Helios-2 system that has already been developed by France. The radar technologies developed by Germany (TerraSAR and SAR Lupe) could be used on SkyMed. The Italian Government intends to allocate considerable funds to the development of this programme.
B. Communications satellites
1. The role of communications satellites
65. The role of communications satellites is to provide forces with communications (data, conversations) that are secure (protection against jamming). It might be useful to jointly develop a military communications satellite in order to ensure interoperability of communications systems during a joint operation.
2. Programmes
(a) Bimilsatcom, a Franco-German programme
66. The Bimilsatcom programme involves Alcatel, Thomson CSF, MMS and DASA. This Franco-German programme is the follow-up to Trimilsatcom, in which the United Kingdom was also a participant. The UK abandoned Trimilsatcom because of its need to acquire an operational system of communications satellites before the end of the current Skynet system. Indeed, the first of the five or six satellites in the European programme would not be launched until 2005, which was not soon enough for London. Bimilsatcom is composed of geostationary satellites which will give Europe global coverage in the field of military communications. The cost of the programme, including the ground stations, is estimated at _2 billion.
(b) National programmes
67. A Skynet follow-up system must be found (since the UK withdrew from Trimilsatcom): MMS UK and Lockheed Martin/Alcatel are competitors and will each be proposing a Skynet-5 programme.
68. SICRAL (Satellite Italiano per Comunicazione Riservate): Italy has made a major financial investment in the design and development of this programme, consisting of a space segment with one operating and one back-up multifrequency satellite, (VHF, SMF and EHF wavebands) in geostationary orbit, and a ground segment comprising the satellite's TT&C and fixed and mobile communication terminals. The satellite weighs a total of 2.5 tonnes at launch and can carry a payload of 330 kg. Finally, SICRAL is interoperable with the NATO IV, Fltsatcom, DSCS and Skynet systems and most of the channels of the Syracuse and Hispasat systems.
69. Hispasat: This telecommunications satellite serves the Spanish programme Ccom Sat. Hispasat 1A (1992) and 1B (1993) were built by MMS and Hispasat 1C by Alcatel. The invitation to tender is under way for Hispasat 1D. The Hispasat system is compatible with the Syracuse (France), Skynet (UK) and NATO IV (NATO) systems.
(c) NATO
70. The NATO programmes (NATO 3D, NATO 4A, NATO 4B etc.) are being pursued.
C. Positioning satellites
1. The issues
71. The creation of a European satellite positioning system would give Europe a system that would be both technically and politically reliable.
72. From the technical point of view there is a risk with the American GPS system, as underlined in Mr Atkinson's report on the millennium bug8: "according to the experts ten types of different problem have been identified in the GPS computer programme and (...) in the case of some of them, it will not be possible to pinpoint them in more detail until three months before the Year 2000".
73. From the political point of view, in spite of the decision to abandon dual precision, the system remains under the control of the United States and is therefore at the mercy of unilateral decisions (jamming) in the event of an international crisis, although such an eventuality is unlikely these days because of the implications (navigation in the civil aviation sector now relies on the GPS system).
74. In economic terms Europe could, by acquiring a system to compete with GPS, participate fully in the positioning-related industry. Indeed, satellite positioning is a generic technology which, increasingly, is being incorporated into all kinds of systems (vehicle navigation, tourist information systems etc.) There are numerous outlets for the GPS technology, both in the civil and military spheres. An estimated nine out of ten positioning systems (GPS or GLONASS) are sold for civil or commercial purposes. And this is just the beginning, because the price of receivers continues to fall and the variety of possible applications is growing all the time.
75. Under no circumstances would it be enough for a European system to be used merely as a means of checking the integrity of GPS data. Europe needs its own system in order to be present on the emerging satellite positioning markets.
2. Global Navigation Satellite System programmes
76. The GNSS programmes are managed by the European Tripartite Group composed of Eurocontrol (European Organisation for the Safety of Air Navigation), the European Space Agency (ESA) and the European Commission. The Commission has given strong impetus to the development of the GNSS programmes.
77. GNSS-1 or EGNOS (European Geostationary Overlay Service) groups together the first generation of European positioning satellites. The aim of EGNOS is to enhance the performance of the GPS and GLONASS satellites by guaranteeing their integrity and improving their precision. Thus, like the American (Wide Area Augmentation System - WAAS) and Japanese (Multi-Function Transport Satellite - MTSAT) programmes being developed for the north American, Pacific and east Asian zones, EGNOS will provide corrections for its users in Europe. Eight European countries have signed an agreement on the development of the EGNOS system, which will become operational in 2002.
78. GNSS-2 or Galileo will be a full positioning system which will work in parallel and be interoperable with the American GPS and Russian GLONASS systems. To enhance its reliability, the system will be composed both of satellites in middle earth orbit (MEO: at an altitude of about 1300 km) and of geostationary satellites. The Russian experience gathered through the GLONASS constellation has provided valuable input for the development of Galileo. The development programme should begin in autumn 1999 and the constellation should be operational by 2008. The global cost of Galileo is estimated at _2.5 to 3 billion.
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