Thanks guys. What a mess this all is! I miss the days of shuttle, because if one of the orbiter's sneezed, you'd have 15 PRCB presentations and by the second IPR coverage to play with
Quote from: iamlucky13 on 11/11/2011 08:06 pmThere are many NEO's that take much less delta-V to reach than Phobos. It has the basic capability to approach such an object and land.Forget about it. There are very few windows for NEOs even at low delta-v.That's one of the dirty little secrets in all the talk about human missions to NEOs. Right now the target set is bad. Really small. Gotta do a better survey and find more targets.
There are many NEO's that take much less delta-V to reach than Phobos. It has the basic capability to approach such an object and land.
YH1. What sort of maneuvering capability does it have? Could it be turned on inside the truss, and if so, used to slowly reorient, or conceivably adjust the orbit of FG? I realize that this is like using an electric scooter to move a dump truck, but I thought I'd ask.
Edit: According to the last 2 elsets (sharply decreasing decay parameter measured in rev/day˛), re-entry date has been pushed forward back, ie it will occur later(using SatEvo)
Source: http://satobs.org/seesat/Nov-2011/0110.html"Phobos-Grunt: latest two TLEs suggest manoeuvring or venting"
I repeat, look at the history of the Hayabusa mission before you call recovery dependent on a
Quote from: kevin-rf on 11/11/2011 07:34 pmSource: http://satobs.org/seesat/Nov-2011/0110.html"Phobos-Grunt: latest two TLEs suggest manoeuvring or venting"Or, simply the orbit is being better constrained by more observations. IMHO that's more likely...
Quote from: iamlucky13 on 11/11/2011 08:06 pmI repeat, look at the history of the Hayabusa mission before you call recovery dependent on a This is a complete joke to draw any parallels with that mission. That spacecraft was not DEAD to begin with. That was a Japanese technology to begin with, far too more advanced in terms of electronics and overall mission preparation. I repeat it is an utter joke to dream that PG could turn into Hayabusa.
That spacecraft was not DEAD to begin with.
As pre previous request, if anyone sees something where I've been too liberal with the facts, let me know on here or via PM (to save me the shame )
Bit 0: Daylight Saving Enable (DSE). This bit is aread / write bit that enables two daylight saving adjustmentswhen DSE is set to 1. On the first Sunday inApril, the time increments from 1:59:59 AM to 3:00:00AM. On the last Sunday in October when the time firstreaches 1:59:59 AM, it changes to 1:00:00 AM. WhenDSE is enabled, the internal logic test for the first / lastSunday condition at midnight. If the DSE bit is not setwhen the test occurs, the daylight saving function doesnot operate correctly. These adjustments do not occurwhen the DSE bit is 0. This bit is not affected by internalfunctions or RESET.
Can anyone computer expert here judges the possibility of the DST problem? Something like this?http://datasheets.maxim-ic.com/en/ds/DS12885-DS12C887A.pdfQuoteBit 0: Daylight Saving Enable (DSE). This bit is aread / write bit that enables two daylight saving adjustmentswhen DSE is set to 1. On the first Sunday inApril, the time increments from 1:59:59 AM to 3:00:00AM. On the last Sunday in October when the time firstreaches 1:59:59 AM, it changes to 1:00:00 AM. WhenDSE is enabled, the internal logic test for the first / lastSunday condition at midnight. If the DSE bit is not setwhen the test occurs, the daylight saving function doesnot operate correctly. These adjustments do not occurwhen the DSE bit is 0. This bit is not affected by internalfunctions or RESET.
Can anyone computer expert here judges the possibility of the DST problem? Something like this?
The change over date was in October
Had this mission launched a few years ago (prior to STS-125 after which the shuttle lost 39B and the ability to put two shuttles on pads simultaneously) how difficult would it have been to have mounted a rescue?Seems like it would be difficult to plan a mission and fly it before this launch window expires.Seems more likely the spacecraft could have been retrieved, returned to Earth, and flow for the next launch window.Maybe not a practical topic for discussion on this forum, but fun to think about nonetheless.