Future Venus Missions |
Future Venus Missions |
Jul 1 2005, 01:30 AM
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#101
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Solar System Cartographer Group: Members Posts: 10189 Joined: 5-April 05 From: Canada Member No.: 227 |
Oh well, might as well start that new topic since it's already well advanced in the Juno area...
My perspective on landers is as follows. All the landers we've had so far were dropped blind onto an essentially unknown surface. Any future landers can be targeted for specific terrains. It really is not true that we have had representative landings. Even a descent image or two, a panoramic photo plus a bit of surface composition, from a simple Venera-class lander just updated a bit, would be useful if we could put several down at well chosen targets. My choices would be: Examples of the main plains units (smooth, fractured, ridged) tesserae high elevation radar-bright tesserae large fresh lava flow unit ('fluctus') crater dark parabola crater ejecta outflow unit dunes area. And I have always assumed, rightly or wrongly, that it would be relatively easy to put these down, so they ought to be fairly inexpensive as planetary landers go. Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Oct 2 2015, 08:18 PM
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#102
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
I have the following tidbit of additional information from Lori Glaze:
QUOTE Mission: Venus atmosphere probe to collect targeted trace & noble gases & isotopes, plus temp, pressure, winds, and imaging. Launch Nov 2021; Touchdown Jun 2023 And this from David Grinspoon:QUOTE Descent imaging. Vis & near-IR. Mass spec. Tunable laser spectroscopy. Atmospheric structure instrument.
-------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Oct 3 2015, 01:20 PM
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#103
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
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Oct 3 2015, 04:04 PM
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#104
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Member Group: Members Posts: 706 Joined: 22-April 05 Member No.: 351 |
why so long? it takes much less than 19 months to get to Venus using a conventional Hohmann orbit A goal of the mission is to descend over one of the tesserae. They may need a transfer orbit that provides a specific set of solar illumination and visibility from Earth tracking stations over the entry point. -------------------- |
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Oct 5 2015, 07:39 AM
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#105
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
They may need a transfer orbit that provides a specific set of solar illumination and visibility from Earth tracking stations over the entry point. You may be right. We will probably know more as more info on the mission is released. BTW, I remember that Magellan too took 15 months and one and half orbit around the Sun to arrive at Venus. In that case, however, the orbit design was due to NASA opting not to launch two back-to-back Shuttle+IUS missions (Magellan and Galileo) on the same Venus launch window. |
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