At 14:32 2002-08-06 -0500, Allen Thomson wrote: >A couple of random thoughts on this thread: > >Antennas: Very large antennas will mostly be made of metal or >metallized mesh, with the holes being somewhat smaller in linear >dimension than the smallest wavelength the antenna is intended >to work with. That's still likely to be much larger than the >wavelength of visible light, and much larger than the typical >air molecule. The upshot of this is that visual brightness (on >a linear scale, W/m^2 or the like), drag and SRP are likely all >to be proportional to the physical area of the threads of the >mesh, not the overall dimensions of the antenna. And, therefore, >proportional to each other. > >Solar panels: Just the obvious comment that some observations >should be made at small phase angles, where brightening and/or >glints might be anticipated from surfaces normal to the incident >sunlight. > > >----------------------------------------------------------------- >Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' >in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org >http://www.satellite.eu.org/seesat/seesatindex.html Normally the holes should be 1/16 th of a wavelength to provide a "leak-proof" RF surface. Sven Grahn ----------------------------------------------------------------- Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org http://www.satellite.eu.org/seesat/seesatindex.html
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