1. See for example http://www.gb.nrao.edu/ovlbi/pressRelease/press97july.html on the radio interferometer made by combining the signals from HALCA an orbiting spacecraft with a radio telescope with those from radio telescopes on the ground.
2. See www.nrao.edu/vla/html/VLAhome.shtml.
3. Angel J.R.P., Woolf N.J., Astrophys. J.475, 373 (1997).
4. Beichman C.A. Woolf N.J. Lindensmith C.A. JPL Publ. 99-3 (1996).
5. Léger A. , et al., Icarus123, 249 (1996).