#1
|
||||
|
||||
Antares GO for launch
Hello All,
Live coverage of today’s re-scheduled Antares launch preparations is already in progress *here* (see: http://spaceflightnow.com/2017/11/1...-status-center/ and www.nasa.gov/nasalive ), and the launch time is 7:14 AM EST (1214 GMT). Yesterday morning’s stray airplane-caused launch scrub is covered here (see: http://spaceflightnow.com/2017/11/1...yward-airplane/ ), and the readers’ comments about the pilot are priceless—and spot-on! :-) I hope this material will be useful.
__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR |
#2
|
||||
|
||||
Assuming audio and video were sync'd, ignition was approximately +1 and liftoff +4 seconds.
__________________
I love sanding. |
#3
|
||||
|
||||
Wow—YouTube’ers are fast! One has already (see: www.youtube.com/watch?v=T6L4R9xKtSg ) uploaded a video of this morning’s Antares Cygnus OA-8 launch which occurred just minutes ago, which includes a quick preliminary “slide show” of the Antares launch vehicle and the Cygnus space freighter being prepared for flight, and a collage covering the space career of the late astronaut Eugene Cernan—the last man to walk on the Moon—after whom the Cygnus spaceship is named.
__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR |
#4
|
||||
|
||||
Quote:
Interestingly, instead of using "T" (for "Time of launch") for the countdown events ("T minus 6 minutes and counting," "T plus 73 seconds," etc.), the Antares launch crew at Wallops appears to be using "L" (for "Launch") instead. At their latest weather briefing yesterday, the meteorological officer referred to the expected winds and cloud cover "at L minus 0." In addition: In the old days, of course, launch crews used "X" because the actual moment of liftoff wasn't known precisely (partly because many terminal countdown events had to be sequenced manually back then). The last launch (at the Cape, at least) to use an "X countdown" was that of Explorer 1, where X minus 0 was "Firing command." This was followed by X plus 0 "Open fuel prevalves; close liquid oxygen vent," and after a few more "X plus ..." events, ignition was at X plus 14 seconds and liftoff occurred at X plus 15.75 seconds. The first countdown to use "T" (where either ignition or liftoff occurred at T=0 [it varies from vehicle to vehicle]) was for the launch of Explorer 2 (whose fourth stage failed to fire, so that it failed to orbit).
__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR |
Thread Tools | Search this Thread |
Display Modes | |
|
|