STS-125 Hubble Repair Mission (Atlantis) [May 2009?]

[nimbus]

What's going on? <div class="Discussion_UserSignature"> </div>

 

[MeteorWayne]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>What's going on? <br />Posted by nimbus</DIV><br /><br />News telecon appears to be starting now...</p><p>&nbsp;</p><p>Or maybe not quite yet... </p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>

 

[Testing]

Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>News telecon appears to be starting now...&nbsp;Or maybe not quite yet... <br />Posted by MeteorWayne</DIV><br /><br />4PM EDT <div class="Discussion_UserSignature"> </div>

 

[MeteorWayne]

Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>4PM EDT <br />Posted by Testing</DIV><br /><br />Underway <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>

 

[Testing]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Underway <br />Posted by MeteorWayne</DIV></p><p>Need scribble notes Wayne, I can't get the audio here.</p> <div class="Discussion_UserSignature"> </div>

 

[MeteorWayne]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Need scribble notes Wayne, I can't get the audio here. <br />Posted by Testing</DIV><br /><br />Well, as expected, not much known. When the ACS (Advanced Camera for Surveys) came up there was a low PS voltage (< 8 Volts) so that was one problem.</p><p>The other was a a loss of a keep alive signal. roughly, the Main Brain and the SDF toggle bits at predetermined times to show they are alive. The Main (or "486", talk about ancient technology!!) computer did not see a toggle, so it put everything in safe mode, as it should.</p><p>&nbsp;They are pretty sure it's not a configuration error, but there's no way to determine yet if it's a transient or a hard failure. Even if it is a hard failure, there are other workarounds. Remember, the SW is designed to just go to safe mode if it sees even the tiniest thing go wrong. Safe now, ask questions later. So it may be no big deal, just don't know yet.</p><p>They've had a huge data dump so are still analyzing, no real detail yet. Long weekend for a few people as that analysis takes place, It seems likely that full science operations will not resume until late next week. </p><p>In a nutshell, that's what we learned.</p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>

 

[MeteorWayne]

<p>At this point, it's old news, but here is the official NASA release:</p><p>&nbsp;</p><div class="address"><span class="bold">Hubble Status Report #4</span></div><div class="promodatepress"><span class="bold">10.17.08</span></div><p>On Wednesday, October 14, engineers at NASA&rsquo;s Goddard Space Flight Center reconfigured six components of the Hubble Data Management System and five components in the Science Instrument Command and Data Handling (SIC &DH) system to use their redundant (or B) sides. This was done to work around a failure that occurred on September 27 in the Side A Science Data Formatter in the SIC&DH and resulted in the cessation of all science observations except for astrometry with the Fine Guidance Sensors. <br /><br />The reconfiguration proceeded nominally and Hubble resumed the science timeline at Noon ET on Thursday, October 16. The first activities out of that on-board science timeline were the commanding of the science instruments from their safe to operate modes. This occurred nominally for Wide Field Planetary Camera 2 and the Near Infrared Camera and Multi Object Spectrometer. However, an anomaly occurred during the last steps of the commanding to the Advanced Camera for Surveys. At 1:40 pm, when the low voltage power supply to the ACS Solar Blind Channel was commanded on, software running in a microprocessor in ACS detected an incorrect voltage level in the Solar Blind Channel and suspended ACS. Then at 5:14 pm, the Hubble spacecraft computer sensed the loss of a "keep alive" signal from the NASA Standard Spacecraft Computer in the SIC&DH and correctly responded by safing the NSSC-I and the science instruments. It is not yet known if these two events were related.<br /><br />The investigation into both anomalies is underway. All data has been collected and is being analyzed. The science instruments will remain in safe mode until the NSSC-I issue is resolved. All other subsystems on the spacecraft are performing nominally and astrometry observations continue. <br /></p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>

 

[Testing]

<p>The Main (or "486", talk about ancient technology!!) computer did not see a toggle, so it put everything in safe mode, as it should.&nbsp;</p><p>In late 1992 or early 93 I bought my first PC. A Gateway 4DX2-66V. A 486 66MHz machine. It was the hottest thing available at the time. 16 Meg of ram,8 was standard, &nbsp;345 Meg WD hard, ATI super dooper vidio card with 1Meg of vidio ram. 2x CD read only, 5.25" and 3.5" floppy drives, Colorado 250 tape backup, 56Bps fax modem (capable, 28.8 was the norm then) Logitec 256 grayscale hand scanner, Summa Sketch tablet, a friend had a bootleg copy of Autocad 9 and I was going to learn it. It came with Windows 3.11 that I later upgraded to Win95 at the Beta stage. An HP 500C 300 dpi printed admirable pictures. I shocked my father by sending him an &nbsp;8.5" x 11" print of His father hand scanned and enhanced from a dim photo taken in the late 1930's. A very capable machine at that time. I believe I paid $4,600, a substantial sum then but I was gonna learn computereze. It got me my current job. </p><p>Hubble launched in 1990, how much earlier the unit on orbit was built is for the Historians. Just putting a different spin on the perspective. Oh, by the way, last year I pulled it out of the closet and it booted fine, faster than my second PC a Dell PII 2.66 lap that I sit in front of now. You never know when someone will want to look at ancient data. Who knows?</p><p>&nbsp;</p> <div class="Discussion_UserSignature"> </div>

 

[trailrider]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>The Main (or "486", talk about ancient technology!!) computer did not see a toggle, so it put everything in safe mode, as it should.&nbsp;In late 1992 or early 93 I bought my first PC. A Gateway 4DX2-66V. A 486 66MHz machine. It was the hottest thing available at the time. 16 Meg of ram,8 was standard, &nbsp;345 Meg WD hard, ATI super dooper vidio card with 1Meg of vidio ram. 2x CD read only, 5.25" and 3.5" floppy drives, Colorado 250 tape backup, 56Bps fax modem (capable, 28.8 was the norm then) Logitec 256 grayscale hand scanner, Summa Sketch tablet, a friend had a bootleg copy of Autocad 9 and I was going to learn it. It came with Windows 3.11 that I later upgraded to Win95 at the Beta stage. An HP 500C 300 dpi printed admirable pictures. I shocked my father by sending him an &nbsp;8.5" x 11" print of His father hand scanned and enhanced from a dim photo taken in the late 1930's. A very capable machine at that time. I believe I paid $4,600, a substantial sum then but I was gonna learn computereze. It got me my current job. Hubble launched in 1990, how much earlier the unit on orbit was built is for the Historians. Just putting a different spin on the perspective. Oh, by the way, last year I pulled it out of the closet and it booted fine, faster than my second PC a Dell PII 2.66 lap that I sit in front of now. You never know when someone will want to look at ancient data. Who knows?&nbsp; <br />Posted by Testing</DIV></p><p>My wife is still doing word processing on an Apple II+!&nbsp; Works just fine for her, and I bought it in 1981.&nbsp; I've replaced two power supplies and one disk drive in that time!&nbsp; (She likes the keyboard.&nbsp;The Apple is sitting right beside a Dell PIII operating on Windows XP, and has been for about 3-1/2 years now! Go figure!) If it still works it ain't completely obsolete!</p><p>Ad LEO! Ad Luna! Ad Ares! Ad Astra!<br /></p>

 

[shuttle_guy]

<p>This off load is to trim the for weight and balance of the Orbiter for a possible destack in the VAB if this Hubble servicing flight can not launch inthe Feb/March 2009 time frame.</p><p>Roll&nbsp; back to the VAB is scheduled to start at 0700 hours Monday Oct. 20. That will be a fairly rare day light Shuttle stack move if the weather co-operates.</p> <div class="Discussion_UserSignature"> </div>

 

[shuttle_guy]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>At this point, it's old news, but here is the official NASA release:&nbsp;Hubble Status Report #410.17.08On Wednesday, October 14, engineers at NASA&rsquo;s Goddard Space Flight Center reconfigured six components of the Hubble Data Management System and five components in the Science Instrument Command and Data Handling (SIC &DH) system to use their redundant (or B) sides. This was done to work around a failure that occurred on September 27 in the Side A Science Data Formatter in the SIC&DH and resulted in the cessation of all science observations except for astrometry with the Fine Guidance Sensors. The reconfiguration proceeded nominally and Hubble resumed the science timeline at Noon ET on Thursday, October 16. The first activities out of that on-board science timeline were the commanding of the science instruments from their safe to operate modes. This occurred nominally for Wide Field Planetary Camera 2 and the Near Infrared Camera and Multi Object Spectrometer. However, an anomaly occurred during the last steps of the commanding to the Advanced Camera for Surveys. At 1:40 pm, when the low voltage power supply to the ACS Solar Blind Channel was commanded on, software running in a microprocessor in ACS detected an incorrect voltage level in the Solar Blind Channel and suspended ACS. Then at 5:14 pm, the Hubble spacecraft computer sensed the loss of a "keep alive" signal from the NASA Standard Spacecraft Computer in the SIC&DH and correctly responded by safing the NSSC-I and the science instruments. It is not yet known if these two events were related.The investigation into both anomalies is underway. All data has been collected and is being analyzed. The science instruments will remain in safe mode until the NSSC-I issue is resolved. All other subsystems on the spacecraft are performing nominally and astrometry observations continue. <br />Posted by MeteorWayne</DIV></p><p>&nbsp;</p><p>Due to the 2 anomalies mentioned above,&nbsp;the Hubble team <strong>estimates</strong> that&nbsp;the Hubble science instruments will be operational again Thursday Oct. 23.</p> <div class="Discussion_UserSignature"> </div>

 

[Testing]

Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>&nbsp;Due to the 2 anomalies mentioned above,&nbsp;the Hubble team estimates that&nbsp;the Hubble science instruments will be operational again Thursday Oct. 23. <br />Posted by shuttle_guy</DIV><br /><br />Thank you Sir for the update. <div class="Discussion_UserSignature"> </div>

 

[3488]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>&nbsp;<font color="#ff0000">Due to the 2 anomalies mentioned above,&nbsp;the Hubble team estimates that&nbsp;the Hubble science instruments will be operational again Thursday Oct. 23. <br /> Posted by shuttle_guy</font></DIV></p><p><font size="2"><strong>Thanks shuttle_guy,</strong></font></p><p><font size="2"><strong>Really only a delay of a few days, not serious really. </strong></font></p><p><font size="2"><strong>You can bet that the Hubble will be used for only the highest priority astronomical observations till after STS 125.&nbsp;</strong></font></p><p><font size="2"><strong>Andrew Brown.&nbsp;</strong></font></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>

 

[fsm]

<p>There also appears to be problems with the spare at NASA headquaters:-&nbsp;</p><p>http://space.newscientist.com/article/dn14908-hubble-replacement-part-has-glitches-of-its-own.html</p><p>Of course you all know about the current Side-B problem. So, does anyone know what happens if only one unit (the one in orbit) is working by Feb 09? Do they cancel?</p><p>As an aside, I always liked the "Hubble Origins Probe" proposal:-</p><p>http://www.spacedaily.com/news/hubble-04p.html</p><p>Although there was a lot of loyalty for the existing Hubble, and the plan to upgrade it, was that correct, or dogmatic?</p><p>&nbsp;</p> <div class="Discussion_UserSignature"> </div>

 

[shuttle_guy]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>......Of course you all know about the current Side-B problem. So, does anyone know what happens if only one unit (the one in orbit) is working by Feb 09? Do they cancel?..............&nbsp; <br />Posted by fsm</DIV></p><p>The "A" side can not be recovered. If the spare unit can be repaired AND checked out by Dec. 1st I believe the servicing mission will attempt a launch in feb or March even if the "B" side can not be fully recovered.</p> <div class="Discussion_UserSignature"> </div>

 

[MeteorWayne]

Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>The "A" side can not be recovered. If the spare unit can be repaired AND checked out by Dec. 1st I believe the servicing mission will attempt a launch in feb or March even if the "B" side can not be fully recovered. <br />Posted by shuttle_guy</DIV><br /><br />Indeed, the replacement should provide a new and functional A & B side. If the on orbit B side cannot be brought up, then the Hubble will be able to do only limited scince until the repair mission. <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>

 

[fsm]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>The "A" side can not be recovered. If the spare unit can be repaired AND checked out by Dec. 1st I believe the servicing mission will attempt a launch in feb or March even if the "B" side can not be fully recovered. <br /> Posted by shuttle_guy</DIV></p><p>Sorry I wasnt being very clear. That article I linked to suggests there are problems with the "in storage" spare at NASA headquarters. I was just wondering if they got Side-B going, but had no spare to take up, would they delay the mission? Or if Side-B was still not working properly, but they had this spare (on the ground) running, would they delay until they had 2 spares to take up? In other words, is just fixing one side enough to justify a Feb 09 launch, or would they probably wait?</p><p>&nbsp;</p> <div class="Discussion_UserSignature"> </div>

 

[shuttle_guy]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Sorry I wasnt being very clear. That article I linked to suggests there are problems with the "in storage" spare at NASA headquarters. I was just wondering if they got Side-B going, but had no spare to take up, would they delay the mission? Or if Side-B was still not working properly, but they had this spare (on the ground) running, would they delay until they had 2 spares to take up? In other words, is just fixing one side enough to justify a Feb 09 launch, or would they probably wait?&nbsp; <br />Posted by fsm</DIV></p><p>They will schedule the STS-125 launch when they have a good spare on the ground to replace the on orbit "A" side</p><p>I do not think there is a possibility of ever having 2 spares on the ground. It would be difficult to find 25 year old parts to build another one.</p> <div class="Discussion_UserSignature"> </div>

 

[Testing]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Theu will schedule the STS-125 launch when they have a good spare on the ground to replace the on orbit "A" sideI do not think there is a possibility of ever having 2 spares on the ground. It would be difficult to find 25 year old parts to build another one. <br />Posted by shuttle_guy</DIV></p><p>Come on, we can get a waiver on the shelf life requirment, can't we?&nbsp;</p><p><br /><br />&nbsp;</p> <div class="Discussion_UserSignature"> </div>

 

[shuttle_guy]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Come on, we can get a waiver on the shelf life requirment, can't we?&nbsp;&nbsp; <br />Posted by Testing</DIV></p><p>The problem would be no parts exist or the museum curators will not release them !<br /></p> <div class="Discussion_UserSignature"> </div>

 

[MeteorWayne]

Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>They will schedule the STS-125 launch when they have a good spare on the ground to replace the on orbit "A" sideI do not think there is a possibility of ever having 2 spares on the ground. It would be difficult to find 25 year old parts to build another one. <br />Posted by shuttle_guy</DIV><br /><br />The replacement being tested on the ground has both side A and side B so replacing the on orbit module will give one functional side and a backup spare side. <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>

 

[shuttle_guy]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>The replacement being tested on the ground has both side A and side B so replacing the on orbit module will give one functional side and a backup spare side. <br />Posted by MeteorWayne</DIV></p><p>I see, I did not realize that MW, thanks. I thought the A and B side were 2&nbsp;separate sets of LRUs (Line Replaceable Units)</p> <div class="Discussion_UserSignature"> </div>

 

[MeteorWayne]

Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>I see, I did not realize that MW, thanks. I thought the A and B side were 2&nbsp;separate sets of LRUs (Line Replaceable Units) <br />Posted by shuttle_guy</DIV><br /><br />Not from what I've been able to glean from the press conferences. Like the on orbit unit, it has redundant A & B sides. <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>

 

[MeteorWayne]

<div class="address"><span class="bold">Hubble Status Report #5</span></div><div class="promodatepress"><span class="bold">10.21.08</span></div><p>On Monday, October 20, engineers at NASA&rsquo;s Goddard Space Flight Center met to discuss their next steps toward resolving two anomalies which caused the B-side of the Science Instrument Control and Data Handling System (SI C&DH-B) and the Advanced Camera for Surveys (ACS) Solar Blind Channel (SBC) to return to a &lsquo;safe hold&rsquo; status on October 16. Following that meeting, an Independent Review Team (IRT) chaired by the Director of the Wallops Flight Facility also met. The near-term focus of the HST Program&rsquo;s efforts and the IRT&rsquo;s efforts will be to assess the risks of activities needed to resume making observations with HST&rsquo;s three functioning science instruments prior to Servicing Mission 4. The next meeting of the full IRT will occur on October 22.<br /><br />Over the weekend, the Hubble team continued detailed reviews of all the data available when last week&rsquo;s anomalies occurred. A suspect 8-volt power source within the SBC&rsquo;s low voltage power supply (LVPS) reached its nominal output value just after failure of an internal check monitoring its health. Hubble engineers are evaluating alternative procedures and determining whether another attempt to restart the LVPS presents a risk to the instrument or to the planned SM4 repair of ACS&rsquo;s other cameras. (SI C&DH-B reactivation must precede SBC turn-on.)<br /><br />Intensive study of the SI C&DH-B shutdown also continues. Analyses done thus far suggest that an electrical event of unknown origin and characteristics caused a reset of both the Control Unit/Science Data Formatter-B (CU/SDF-B) and the NASA Standard Spacecraft Computer-1 (NSSC-1) Central Processing Module-B (CPM-B). Both of these modules were activated on-orbit for the first time on October 15. Additional analyses and a risk assessment of SI C&DH-B reactivation have begun.<br /><br />All other subsystems on Hubble are performing nominally, and astrometry observations with HST&rsquo;s Fine Guidance Sensors continue. <br /><br /></p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>

 

[Testing]

&nbsp;Additional analyses and a risk assessment of SI C&DH-B reactivation have begun.All other subsystems on Hubble are performing nominally, and astrometry observations with HST&rsquo;s Fine Guidance Sensors continue. <br />Posted by MeteorWayne[/QUOTE]<br /><br />So they are looking at a supply voltage that takes a few milliseconds longer than planned to stabilize. I am much more interested in how things are going with the on ground spare. No comments from SM4ENG recently. Cage rattle! <div class="Discussion_UserSignature"> </div>