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My understanding is that they need three pods to approach ISS. <BR> <BR>The rocket seems to have worked as planned this time, with no payloads destroyed; now it's Dragon that's playing up.<br><br>David S. F. Portree<br><br><a href="mailto:dsfportree@hotmail.com">dsfportree@hotmail.com</a><br><a href="mailto:dportree@usgs.gov">dportree@usgs.gov</a><br> <br><a href="http://www.wired.com/wiredscience/beyondapollo/" target="_blank">http://www.wired.com/wiredscience/beyondapollo/</a> <br> <br><font size="2"><font size="2"><a href="http://astrogeology.usgs.gov/people/david-portree" target="_blank">http://astrogeology.usgs.gov/people/david-portree</a><br></font></font> <br><br><br> <BR><div><div id="SkyDrivePlaceholder"></div><hr id="stopSpelling">From: pjp961@svol.net<br>To: fpspace@friends-partners.org<br>Date: Fri, 1 Mar 2013 12:41:50 -0500<br>Subject: [FPSPACE] SpaceX successfully launches again;  thruster pod valve anomaly delayed Dragon solar panel opening<br><br>








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<p class="ecxMsoNormal"><font size="2" face="Arial"><span style="font-family: Arial; font-size: 10pt;">From spacerefbiz</span></font></p>

<p class="ecxMsoNormal"><font size="2" face="Arial"><span style="font-family: Arial; font-size: 10pt;"> </span></font></p>

<p class="ecxMsoNormal"><font size="2" face="Arial"><span style="font-family: Arial; font-size: 10pt;"><a href="http://spaceref.biz/2013/03/spacex-falcon-9-launches-on-second-space-station-resupply-mission.html" target="_blank">http://spaceref.biz/2013/03/spacex-falcon-9-launches-on-second-space-station-resupply-mission.html</a></span></font></p>

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<p class="ecxMsoNormal"><font size="2" face="Arial"><span style="font-family: Arial; font-size: 10pt;">Video and image captures at the URL link</span></font></p>

<h1 style="background: white;"><font size="5" face="Georgia"><span style="font-size: 19.5pt;" lang="EN">SpaceX Falcon 9 Launches But Anomaly Detected Which
Delayed Solar Array Deployment (Updated)</span></font></h1>

<ul type="disc">
 <li style="background: white; color: rgb(153, 153, 153); line-height: 8pt;" class="ecxMsoNormal"><font color="#999999" size="1" face="Arial"><span style="font-family: Arial; font-size: 7.5pt;" lang="EN">By <a href="http://spaceref.net/mt-cp.cgi?__mode=view&blog_id=21&id=3" target="_blank">Marc
     Boucher</a></span></font></li>
 <li style="background: white; color: rgb(153, 153, 153); line-height: 8pt;" class="ecxMsoNormal"><font color="#999999" size="1" face="Arial"><span style="font-family: Arial; font-size: 7.5pt;" lang="EN">Posted <abbr title="2013-03-01T09:56:41-05:00">March
     1, 2013 9:56 AM</abbr></span><abbr title="2013-03-01T09:56:41-05:00"></abbr></font><abbr title="2013-03-01T09:56:41-05:00"></abbr></li>
</ul>

<p style="background: white;" class="ecxMsoNormal"><font size="3" face="Georgia"><span style="font-family: Georgia; font-size: 11.5pt;" lang="EN">This morning at 10:10 a.m. EST, a SpaceX Falcon 9
with Dragon spacecraft launched from Space Launch Complex 40 at Cape Canaveral
Air Force Station on its second of 12 NASA contracted resupply missions to the
International Space Station (ISS).</span></font></p>

<p style="background: white;" class="ecxMsoNormal"><font size="3" face="Georgia"><span style="font-family: Georgia; font-size: 11.5pt;" lang="EN">Less than 24 hours after launching, the SpaceX
Dragon is supposed to arrive at the ISS where the station crew will grapple and
berth the spacecraft to the ISS for an expected three week visit.</span></font></p>

<p style="background: white;" class="ecxMsoNormal"><font size="3" face="Georgia"><span style="font-family: Georgia; font-size: 11.5pt;" lang="EN">However just before the Dragon solar arrays were to
deploy an anomaly was mentioned. The spacecraft appeared to be in the correct
orbit with stage separation accomplished.</span></font></p>

<p style="background: white;" class="ecxMsoNormal"><font size="3" face="Georgia"><span style="font-family: Georgia; font-size: 11.5pt;" lang="EN">According to Elon Musk there is an "issue with
Dragon thruster pods. System inhibiting three of four from initializing. About
to command inhibit override."</span></font></p>

<p style="background: white;" class="ecxMsoNormal"><font size="3" face="Georgia"><span style="font-family: Georgia; font-size: 11.5pt;" lang="EN">Musk further tweeted that they were "holding
on solar array deployment until at least two thruster pods are active."</span></font></p>

<p style="background: white;" class="ecxMsoNormal"><font size="3" face="Georgia"><span style="font-family: Georgia; font-size: 11.5pt;" lang="EN">SpaceX then released the following statement
"One thruster pod is running. Two are preferred to take the next step
which is to deploy the solar arrays. We are working to bring up the other two
in order to plan the next series of burns to get to station."</span></font></p>

<p style="background: white;" class="ecxMsoNormal"><font size="3" face="Georgia"><span style="font-family: Georgia; font-size: 11.5pt;" lang="EN">At about the same time as the release was received
Musk then tweeted that Dragon was "about to pass over Australia
ground station and command inhibit override." And then a little while
later Musk tweeted "thruster pod 3 tank pressure trending positive.
Preparing to deploy solar arrays."</span></font></p>

<p style="background: white;" class="ecxMsoNormal"><font size="3" face="Georgia"><span style="font-family: Georgia; font-size: 11.5pt;" lang="EN">Then came the update people were hoping for as Musk
tweeted "solar array deployment successful." </span></font></p>

<p style="background: white;" class="ecxMsoNormal"><font size="3" face="Georgia"><span style="font-family: Georgia; font-size: 11.5pt;" lang="EN">After the solar array was deployed SpaceX issued
another statement: "Falcon 9 lifted off as planned and experienced a
nominal flight. After Dragon achieved orbit, the spacecraft experienced an
issue with a propellant valve. One thruster pod is running. We are trying to
bring up the remaining three. We did go ahead and get the solar arrays
deployed. Once we get at least 2 pods running, we will begin a series of burns
to get to station."</span></font></p>

<p style="background: white;" class="ecxMsoNormal"><font size="3" face="Georgia"><span style="font-family: Georgia; font-size: 11.5pt;" lang="EN">A press conference has been delayed but is expected
sometime today.</span></font></p>

<p style="background: white;" class="ecxMsoNormal"><font size="3" face="Georgia"><span style="font-family: Georgia; font-size: 11.5pt;" lang="EN">The Dragon spacecraft is filled with about 1,200
pounds (544kg) of supplies, including supplies to support the 160 scientific
investigations that are being performed by station's Expedition 34 crew. </span></font></p>

<p style="background: white;" class="ecxMsoNormal"><font size="3" face="Georgia"><span style="font-family: Georgia; font-size: 11.5pt;" lang="EN">The SpaceX Dragon is scheduled to return with about
2,300 pounds (1043kg) of cargo including important scientific materials, crew
supplies and education experiments. </span></font></p>

<p style="background: white;" class="ecxMsoNormal"><font size="3" face="Georgia"><span style="font-family: Georgia; font-size: 11.5pt;" lang="EN">Dragon is currently scheduled to return to Earth on
March 25 with a parachute-assisted splashdown off the coast of Baja California.</span></font></p>

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