We are still waiting for Thermal to proclaim balance (TC-104). From the top of Olympus the best estimate is no earlier than 0800. So we wait.
"Someday we'll look back on all this and plow into a parked car."
Monday, December 8, 2008
Balancing Act
LRO Tvac update for December 7, 2008 at 8:45 p.m.
We met the 24 hour requirement for pressure stabilization at 7:45 p.m. We are currently in TC-104 waiting for Thermal to declare Cold Survival Balance. Anticipated completion time for TC-104 is additional 6 to 7 hours. Then we move to TC-105, Cold survival Balance which will be another 4 hours wait. Thermal best guess is; it will be sometimes during morning shift before we complete TC-105 and begin transition to Cold Soak #3.
We have completed:
7:00 p.m. TC-102; C&DH DSB Memory Test
7:08 p.m. TC-104; Set Batter Voltage to 28V
7:15 p.m. TC-104; RW ON, at 0 Torque
7:20 p.m. TC-104; Hardline command/telemetry
7:45 p.m. TC-103; Wait for 24 hour Pressure Stabilization
Massoud
Cheer up, the worst is yet to come.
We met the 24 hour requirement for pressure stabilization at 7:45 p.m. We are currently in TC-104 waiting for Thermal to declare Cold Survival Balance. Anticipated completion time for TC-104 is additional 6 to 7 hours. Then we move to TC-105, Cold survival Balance which will be another 4 hours wait. Thermal best guess is; it will be sometimes during morning shift before we complete TC-105 and begin transition to Cold Soak #3.
We have completed:
7:00 p.m. TC-102; C&DH DSB Memory Test
7:08 p.m. TC-104; Set Batter Voltage to 28V
7:15 p.m. TC-104; RW ON, at 0 Torque
7:20 p.m. TC-104; Hardline command/telemetry
7:45 p.m. TC-103; Wait for 24 hour Pressure Stabilization
Massoud
Cheer up, the worst is yet to come.
Sunday, December 7, 2008
FSW Memory Upload Complete (TC-101)
TC-101, Memory upload is complete. We are moving on to the C&DH DSB Test.(TC-102) This test takes about 4 hours. At that point we will have been at hard vacuum (less than 10-5 torr) for over 24 hours, so we can drop through the 24 hour hold for pressure stablization (TC-103), and go directly into Preparation for Cold Balance (TC-104), which takes 6 hours.
DIVINER Test and instrument Data completed
As of 9:54 AM today 12/7/2008, we have completed the DIVINER Thermal Mapping Test (TC-100) and we have dumped the memory to recover the instrument data for the DIVINER, NAC and WAC.
The instruments have been turned off in prepration for the memory upload, (TC-101)
We are planning on moving to the Flight software update (TC-101). We need to see if we can get the software folks in early so we can start the s/w upload, right now they are scheduled in here @11:00 AM
"We must either find a way or make one!"
-Hannibal, on crossing the Alps
"Many things which nature makes difficult become easy to the man who uses his brains"
-Hannibal, upon entering Rome
"As your mother tells you, and my mother certainly told me, it is important, she always used to say, always to try new things."
Hannibal Lecter, on on cannibalism
The instruments have been turned off in prepration for the memory upload, (TC-101)
We are planning on moving to the Flight software update (TC-101). We need to see if we can get the software folks in early so we can start the s/w upload, right now they are scheduled in here @11:00 AM
"We must either find a way or make one!"
-Hannibal, on crossing the Alps
"Many things which nature makes difficult become easy to the man who uses his brains"
-Hannibal, upon entering Rome
"As your mother tells you, and my mother certainly told me, it is important, she always used to say, always to try new things."
Hannibal Lecter, on on cannibalism
12/7/08 A New Day
Due to the issue with the SAS rack (PRB-734) today's plan is roughly 8 hours behind our original schedule.
DLRE Portrait (TC-100) will complete around 11:30AM.
Load FSW kernel (TC-101) will start around 11:30AM and maybe finish by 1:00PM.
DSB Memory Test (TC-102) will start around 1:00PM and maybe finish around 5:00PM.
Wait for 24 hours for pressure (TC-103) is a placeholder for waiting until 12/7/08 7:44PM EDT. The chamber reached 1E-5 Torr on 12/6/08 at 7:44PM. The chamber must be at 1E-5 Torr for 24-hours before any high voltage can be turned on. We can't proceed to TC-104 before 24-hours has elapsed. So TC-103 is going to be either short or long depending upon how the rest of the day goes.
With any luck we will finish TC-102 before the 24-hour mark, and we'll be back on schedule. The waiting time of TC-103 will just be shorter than originally planned.
"It is a mistake to think you can solve any major problems just with potatoes." Douglas Adams
DLRE Portrait (TC-100) will complete around 11:30AM.
Load FSW kernel (TC-101) will start around 11:30AM and maybe finish by 1:00PM.
DSB Memory Test (TC-102) will start around 1:00PM and maybe finish around 5:00PM.
Wait for 24 hours for pressure (TC-103) is a placeholder for waiting until 12/7/08 7:44PM EDT. The chamber reached 1E-5 Torr on 12/6/08 at 7:44PM. The chamber must be at 1E-5 Torr for 24-hours before any high voltage can be turned on. We can't proceed to TC-104 before 24-hours has elapsed. So TC-103 is going to be either short or long depending upon how the rest of the day goes.
With any luck we will finish TC-102 before the 24-hour mark, and we'll be back on schedule. The waiting time of TC-103 will just be shorter than originally planned.
"It is a mistake to think you can solve any major problems just with potatoes." Douglas Adams
Back in Black
We have successfully tested the "emergency power-down GSE to power the HGAS heaters" configuration. It works great.
We also made the quickest possible entry into the white room to fetch the soldering iron etc. to repair the SAS rack. A connector had decided that today would be a good day to wear out. We bypassed the offending connector and soldered the wire to the board. We've re-powered the spacecraft and the SAS rack works great.
We will now begin to cool the shrouds rerun the transition (TC-99) and when appropriate we'll begin DLRE field of regard thermal mapping test (TC-100), expected to take until about about 6.5 to 7 hours.
That means that the FSW load (TC-101) will be no earlier than 10:00AM, sleep in.
That also means that the DSB Memory Test (TC-102) will be no earlier than Noon. sleep in and have a big breakfast.
“If you don't know where you are going, any road will get you there.” Lewis Carroll
We also made the quickest possible entry into the white room to fetch the soldering iron etc. to repair the SAS rack. A connector had decided that today would be a good day to wear out. We bypassed the offending connector and soldered the wire to the board. We've re-powered the spacecraft and the SAS rack works great.
We will now begin to cool the shrouds rerun the transition (TC-99) and when appropriate we'll begin DLRE field of regard thermal mapping test (TC-100), expected to take until about about 6.5 to 7 hours.
That means that the FSW load (TC-101) will be no earlier than 10:00AM, sleep in.
That also means that the DSB Memory Test (TC-102) will be no earlier than Noon. sleep in and have a big breakfast.
“If you don't know where you are going, any road will get you there.” Lewis Carroll
Loose connection.
Traced the problem to a loose pin in one of the connectors in the rack. We are working on a remedy.
12:00am Delays.
One of the power supplies on the SAS rack is not working. We are warming up the test enclosure so we can power down the spacecraft so we can look at the SAS rack. Tom believes a diode in the rack is blown and needs to test it. We are also going to use the external power supply to power the HGAS heaters.
After we check it out, we will resume with the Diviner mapping. This is delaying the FSW kernel upload and DSB testing. I'm sure it won't start until the morning. Stay tuned.
After we check it out, we will resume with the Diviner mapping. This is delaying the FSW kernel upload and DSB testing. I'm sure it won't start until the morning. Stay tuned.
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