In a message dated 04/12/31 12:00:12, [EMAIL PROTECTED] writes: << So what's the required delta-V for a "minimal mothball orbit-raising mission" - i.e., boost it to an orbital altitude such that the orbit won't decay any time soon, and it can safely be powered down and allowed to "go passive" pending a later full-repair mission? >>
A company with which I'm associated, Tethers unlimited, would be happy to sell the government an electrodynamic tether drag makeup system for the HST. Using the power of the HST's arrays, it would keep the thing up there indefinately. It would also stablilize the HST in gravity gradient mode, so they could cage the gyros. I don't think the astronomers want to mothball, it though. They want to use it. From: Henry Spencer <[EMAIL PROTECTED]> Subject: Re: [ERPS] Orbital Mechanics <<Actually, the numbers work out fairly well for electric propulsion to move Hubble to the station orbit, using off-the-shelf thrusters and solar arrays.>> Glad to hear it. I didn't take time to look at that--my gut feeling was the power to mass situation wouldn't be favorable. --Best, Gerald --Best, Gerald _______________________________________________ ERPS-list mailing list [email protected] http://lists.erps.org/mailman/listinfo/erps-list
