(17) Hartmann, G., Moritz, K., “Astro-SPAS - A Carrier for In-Orbit Science and Technology Demonstration,” published by DARA and DASA/MBB Space Communications and Propulsion Systems Division, 1991. (18) Costs were estimated in a letter from DASA/MBB in answer to Eurospace questions. (19) See, for example, Accessing Space, NP-118 published by the NASA Office of Commercial Programs, Washington D.C., 1991. (20) Interavia's Space Directory, p. 99 (21) From presentation viewgraphs supplied by Kayser-Threde, 1991. (22) Kessler, C., et al., “RAPUNZEL - Rope Attached Piggyback Unit Zooming on Environmental Data at Low Cost,” presented at the 42nd IAF Congress in Montreal, Canada, Oct, 1991. (23) Based on information supplied to Eurospace by International MicroSpace on their Orbital Express vehicle. (24) Data obtained from discussions with the Swedish Space Corporation and from the “Maser User Manual,” 1991 supplied by SSC. (25) “Advanced Technology Experiment Onboard Space Flyer Unit (SFU) - Microwave Energy Transmission in Space (METS),” produced by ISAS, March 1988, p. 2. (26) Chang, K., et al., “Demonstration of Microwave Power Transmission in Space,” Proceedings of the Second International Symposium, SPS ‘91 Power From Space,Paper Bl.2, p. 346. (27) “Tether System Technology Report - Executive Summary,” Alenia, 1989. (28) See, for example, Pioneering the Space Frontier - The Report of the National Commission on Space, (Bantam Books, Washington DC, May 1986), pp. 126-127. (29) Interavia Space Directory, p. 180. (30) Data on SEDSAT-1 was obtained from conversations with Denis Wingo of the University of Alabama in Huntsville. See also, Lorenzini, E., Carroll, J., “In-Orbit Experimentation with the Small Expendable-Tether Deployment System,” ESA Journal, Vol. 15, 91/1, p. 27.
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