<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'> <font color="#ff0000">Yes, that is a little surprising to me as well. My recollection is a little hazy this far down the track, but the MER's initial imaging did seem almost real-time by comparison. (or as real-time as the distances allow) We were obviously spoilt by those wildly successful landings and the favourable placement of Odyssey for the data relay. SK <br />Posted by SpaceKiwi</font></DIV></p><p><font size="2"><strong><font color="#000000">Hi SpaceKiwi. Yes I </font><font color="#000000">think</font></strong><font color="#000000"><strong> we were very spoilt by the MERs in this respect. IIRC Mars Pathfinder was pretty quick also, though Pathfinder did land in the pre dawn darkness. I remember that night very well. On the late news it was announced that Pathfinder landed & sent back a signal, confirming a successful landing & that the airbag approach was a huge success. I stayed up most of that night (in July it gets light early here, by 4:00 AM it is already quite light), watching crap on TV, but they had hourly news bulletins. </strong></font></font></p><p><font size="2"><font color="#000000"><strong>Then at about 4:00 AM our time, the first images were shown. They were a couple of engineering mugshots & a view of the horizon. Then I knew Pathfinder was going to be OK. Later that morning, they then showed the colour shot with Sojourner on the panel, a puffed up airbag on the right, with the Twin Peaks in the background & boulders leaning in one direction (evidence of a powerful, surging, flooding event in Ares Vallis).</strong> </font><font color="#000000"><strong>Amazing moment that was. I am too young to really remember the Vikings, but Pathfinder was a very special moment, the first surface data from Mars in 21 years, incidently from the original primary site of the Viking 1 lander BTW.</strong></font></font></p><p>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'><font color="#ff0000">Good point andrew. They had a map showing the density of boulders > 1.5 meter in size. The landing ellipse was chosen so the density was such (from Hi Rise images) that there would be 1 or 2 such rocks in an area the size of a football field (US) or pitch (the rest of the world). </font><font color="#ff0000">BTW, they did skip the last course correction maneuver (not needed). One more comes up over this weekend, IIRC, then there is a last one after Phoenix is in Mars' gravity spell about a day before landing (~ 21 hours)Posted by MeteorWayne</font></DIV></p><p><strong><font size="2">Hi Wayne. It is great news that the last course correction maneuver was cancelled, shows how accurately Phoenix is on course for a pin point landing. </font></strong></p><p><strong><font size="2">One or two boulders in the an area the size of a football pitch, does seem good odds against problems with boulders tipping Phoenix over, or wedging the solar panels preventing them opening.</font></strong></p><p><strong><font size="2">Below is the link to the latest update from the NASA Phoenix site (not the University of Arizona one).<br /><br /></font></strong>
<strong><font size="2">http://www.nasa.gov/mission_pages/phoenix/news/phoenix-2008050813.html</font></strong></p><p><font size="2"><strong>Landing sites on Mars using MGS MOLA data.</strong></font></p><p>
<strong><font size="2" color="#000080">http://img297.imageshack.us/my.php?image=marslandingsitesonmgsmosk6.jpg</font></strong><br />
<img src="http://sitelife.space.com/ver1.0/Content/images/store/15/8/afd69689-e970-4739-a827-b7bbded168c4.Medium.jpg" alt="" /></p><p><font size="2" color="#000000"><strong>Simulated view of Phoenix on an actual MRO HiRISE subframe of the landing site, showing only a very few boulders, within the 'sweet spot'.</strong></font></p><p><font size="2" color="#000000"><strong>
<font color="#000080">http://img254.imageshack.us/my.php?image=marsphoenixlandersimulaov1.jpg</font></strong></font><font size="2" color="#000000"><strong><br />
<img src="http://sitelife.space.com/ver1.0/Content/images/store/4/1/8417d3a4-ce79-4a54-a1b3-440a156b52e4.Medium.jpg" alt="" /></strong></font></p><p><font size="2" color="#000000"><strong>As above, but showing an area that could pose problems if Phoenix misses the 'sweet spot'.<br />
<font color="#000080">http://img405.imageshack.us/my.php?image=marsphoenixlandersimulaqm4.jpg</font></strong></font><font size="2" color="#000000"><strong><br />
<img src="http://sitelife.space.com/ver1.0/Content/images/store/9/7/a928ec1c-1b40-4c0b-97b1-8b3492d64647.Medium.jpg" alt="" /></strong></font></p><p><font size="2" color="#000000"><strong>Overview of terrain types within the landing ellipse of Phoenix.</strong></font></p><p><font size="2" color="#000000"><strong>
<font color="#000080">http://img187.imageshack.us/my.php?image=marsphooenixlanderlandicf6.jpg</font></strong></font><font size="2" color="#000000"><strong><br />
<img src="http://sitelife.space.com/ver1.0/Content/images/store/0/9/40b347b1-1ac6-43e3-b927-e56239a0c3a0.Medium.jpg" alt="" /></strong></font></p><p><font size="2" color="#000000"><strong>Boulder size ratio per hectare in Phoenix landing ellipse graphic.</strong></font></p><p><font size="2" color="#000000"><strong>
<font color="#000080">http://img105.imageshack.us/my.php?image=marsphoenixlanderlandinbc0.jpg</font><br />
<img src="http://sitelife.space.com/ver1.0/Content/images/store/0/3/60b1f2d3-0308-4d88-a3f7-b2cf767373ff.Medium.jpg" alt="" /><br /></strong></font></p><p><strong><font size="2">Landing Countdown.</font></strong></p><p><font size="2" color="#000000"><strong>Days: 12<br />Hours: 1<br />Minutes: 47<br />Seconds: 30</strong></font></p><p><strong><font size="2">Andrew Brown.</font></strong></p> <div class="Discussion_UserSignature"> <p><font color="#000080">"I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before".</font> <em><strong><font color="#000000">Linda Morabito </font></strong><font color="#800000">on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.</font></em></p><p>
<font size="1" color="#000080">http://www.launchphotography.com/</font><br /><br />
<font size="1" color="#000080">http://anthmartian.googlepages.com/thisislandearth</font></p><p>
<font size="1" color="#000080">http://web.me.com/meridianijournal</font></p> </div>