Quote from: mn on 01/05/2017 08:09 pm1. How many F9 launches did we have a situation where you can see 10 minutes in advance that you would like to move the T0 by a few minutes to get a better odds of a GO - trying to fly between the clouds...? 2. Was there ever a F9 launch scrubbed because the weather was RED at T0 but they could have gotten a GREEN had they been able to adjust the T0 10 minutes in advance? 1. Boat in the box, bad weather, range problem, GSE problem, etc. Many things that could clear up in few minutes instead of scrub for an instantaneous window. 2. yes.
1. How many F9 launches did we have a situation where you can see 10 minutes in advance that you would like to move the T0 by a few minutes to get a better odds of a GO - trying to fly between the clouds...? 2. Was there ever a F9 launch scrubbed because the weather was RED at T0 but they could have gotten a GREEN had they been able to adjust the T0 10 minutes in advance?
Quote from: Jim on 01/05/2017 08:47 pmQuote from: mn on 01/05/2017 08:09 pm1. How many F9 launches did we have a situation where you can see 10 minutes in advance that you would like to move the T0 by a few minutes to get a better odds of a GO - trying to fly between the clouds...? 2. Was there ever a F9 launch scrubbed because the weather was RED at T0 but they could have gotten a GREEN had they been able to adjust the T0 10 minutes in advance? 1. Boat in the box, bad weather, range problem, GSE problem, etc. Many things that could clear up in few minutes instead of scrub for an instantaneous window. 2. yes.SES-9 had a hold at for a boat in the range; it was recycled and another attempt made about 30 minutes later but the LOX had warmed too much. http://forum.nasaspaceflight.com/index.php?topic=39348.160
At most you can say if there is a boat already in the box before the terminal count they can push the T0 by a few minutes and hope for the best, possible but I don't recall that happening.
i have a question. I live in the Greater Los Angeles area, about 200 miles ESE of the Vandenburg Range. Assuming clear skies, nominal flight, and a view clear of obstructions, is there any chance I might be able to see any of the higher altitude flight? Since this would be at about 10:30 in the morning locally, would I have any better or worse luck seeing future flights at different times of day, such as in the middle of the night?
For those interested in yaw steering, suggest you google "yaw steering patent". Many. Likely difficult litigation too.Landing deals with an finite element model of an elastic vehicle in an inertial frame on a ballistic arc, to specific target(s). Yaw steering involves dynamic orbital mechanics to optimally, iteratively apply know vehicle performance to achieve multiple and concurrent degenerate flight guidance solutions compensating for missed propulsion "opportunities". Apples and oranges.
Both are sinks for the same vehicle performance capability, which when you are maxing out with minimal margins, have limited benefit. Oh, and certain necessary performance characteristics have to be designed into the LV for the ability to "catch up" in certain orbital insertions.You'd want to do this on a mature vehicle, not one under significant development....
Quote from: Robotbeat on 01/05/2017 06:29 pmQuote from: Chris Bergin on 01/05/2017 05:22 pmF9 is vertical and going for an attempt today.Will update again if we hear of a firing. HOWEVER, as per usual, only SpaceX (or Iridium as the customer) can declare a good static fire, usually via Twitter. Then it'll be data review and LRR.Are they doing the static fire with the payload attached? :'D
Quote from: Chris Bergin on 01/05/2017 05:22 pmF9 is vertical and going for an attempt today.Will update again if we hear of a firing. HOWEVER, as per usual, only SpaceX (or Iridium as the customer) can declare a good static fire, usually via Twitter. Then it'll be data review and LRR.Are they doing the static fire with the payload attached? :'D
F9 is vertical and going for an attempt today.Will update again if we hear of a firing. HOWEVER, as per usual, only SpaceX (or Iridium as the customer) can declare a good static fire, usually via Twitter. Then it'll be data review and LRR.
Quote from: Robotbeat on 01/05/2017 06:29 pmQuote from: Chris Bergin on 01/05/2017 05:22 pmF9 is vertical and going for an attempt today.Will update again if we hear of a firing. HOWEVER, as per usual, only SpaceX (or Iridium as the customer) can declare a good static fire, usually via Twitter. Then it'll be data review and LRR.Are they doing the static fire with the payload attached? :'DEver since AMOS-6 there is a couple hundred million dollars worth of reasons to NOT have your payload attached to the rocket for the static fire. It is likely that just about every SpaceX customer will now use that option by default.
Quote"The FAA has not yet issued a license to SpaceX for a launch in January," the Federal Aviation Administration said on Thursday. "The FAA continues to work closely with SpaceX as they conduct the investigation and prepare for future Falcon 9 launches."http://money.cnn.com/2017/01/05/news/elon-musk-spacex-launch/
"The FAA has not yet issued a license to SpaceX for a launch in January," the Federal Aviation Administration said on Thursday. "The FAA continues to work closely with SpaceX as they conduct the investigation and prepare for future Falcon 9 launches."
Quote from: rasumner on 01/06/2017 11:06 amQuote"The FAA has not yet issued a license to SpaceX for a launch in January," the Federal Aviation Administration said on Thursday. "The FAA continues to work closely with SpaceX as they conduct the investigation and prepare for future Falcon 9 launches."http://money.cnn.com/2017/01/05/news/elon-musk-spacex-launch/Hmmm...What's up, I wonder? Is the FAA trying to take on mission assurance as well?EDIT: Not likely going to be a problem.
Quote from: Robotbeat on 01/06/2017 11:33 amQuote from: rasumner on 01/06/2017 11:06 amQuote"The FAA has not yet issued a license to SpaceX for a launch in January," the Federal Aviation Administration said on Thursday. "The FAA continues to work closely with SpaceX as they conduct the investigation and prepare for future Falcon 9 launches."http://money.cnn.com/2017/01/05/news/elon-musk-spacex-launch/Hmmm...What's up, I wonder? Is the FAA trying to take on mission assurance as well?EDIT: Not likely going to be a problem.How can not having a launch license be anything other than a problem.