Author Topic: LIVE: Atlas V 401 - Cygnus OA-4 (CRS-4) - December 6, 2015 (21:44 UTC)  (Read 192555 times)

Offline MattMason

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Ah. History repeats itself for "Deke," and as someone noted, he got his Atlas ride, too.

Congrats to Orbital and special props to ULA for stepping in for CRS. You guys make rockets look easy.
"Why is the logo on the side of a rocket so important?"
"So you can find the pieces." -Jim, the Steely Eyed

Online zubenelgenubi

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Atlas Common Core Booster re-entry sighted?

Today's edition of Spaceweather.com reports that the CCB re-entry was (most likely) observed from Halifax, NS.

Also, this observation from SeeSat-l: http://www.satobs.org/seesat/Dec-2015/0040.html

(Attached map image is also from the Spaceweather.com article.)

My attempt to observe the launch from Northern Virginia failed.  Sunset was 2 minutes after launch time, and my eastern sky was obscured with light, high cloud cover.
« Last Edit: 12/07/2015 05:15 PM by zubenelgenubi »
Support your local planetarium!

Offline robertross

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Atlas Common Core Booster re-entry sighted?

Today's edition of Spaceweather.com reports that the CCB re-entry was (most likely) observed from Halifax, NS.

Also, this observation from SeeSat-l: http://www.satobs.org/seesat/Dec-2015/0040.html

(Attached map image is also from the Spaceweather.com article.)

Dang, missed it!
Remembering those who made the ultimate sacrifice for our rights & freedoms, and for those injured, visible or otherwise, in that fight.

Online Satori

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Did anyone managed to get the exact launch time in format 2144:57.XXX?

Thank you!

Offline Newton_V

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Did anyone managed to get the exact launch time in format 2144:57.XXX?

Thank you!

21:44:57.10

Offline JimO

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How many onboard photos of the Atlas plume did Kelly get, and how can I get all of them?

Online cwr

Did anyone managed to get the exact launch time in format 2144:57.XXX?

Thank you!

21:44:57.10

Could you explain the source of that take-off time?

An Atlas V/401 lifts off 1.1 seconds after T=0 so since T=0
was targeted at 21:44:57 UTC I was expecting that actual lift off
would be between 21:44:58 and 21:44:59 UTC.

If I had to guess 21:44:57.10 sounds like a screen grab of T=0
rather than lift off?

Plus range lift off times are usually quoted to the millisecond in the form
requested by Satori.

Thanks

Carl

Offline Newton_V

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Did anyone managed to get the exact launch time in format 2144:57.XXX?

Thank you!

21:44:57.10

Could you explain the source of that take-off time?

An Atlas V/401 lifts off 1.1 seconds after T=0 so since T=0
was targeted at 21:44:57 UTC I was expecting that actual lift off
would be between 21:44:58 and 21:44:59 UTC.

If I had to guess 21:44:57.10 sounds like a screen grab of T=0
rather than lift off?

Plus range lift off times are usually quoted to the millisecond in the form
requested by Satori.

Thanks

Carl

When he said "launch time", I assumed he meant MET = 0 (mission elapsed time), not liftoff time, because he only did not fill in the .XXX
Actual liftoff time can only be determined from post flight analyses.  There is no breakwire.

The time came from the Orbital Parameter Message (OPM) which lists the epoch of MET=0 in UTC time.

The second and third decimal place in the second also is determined during post flight assessment.
« Last Edit: 12/08/2015 01:06 AM by Newton_V »

Offline yg1968

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Full launch webcast:

« Last Edit: 12/08/2015 01:14 AM by yg1968 »

Online Satori

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Did anyone managed to get the exact launch time in format 2144:57.XXX?

Thank you!

21:44:57.10

Could you explain the source of that take-off time?

An Atlas V/401 lifts off 1.1 seconds after T=0 so since T=0
was targeted at 21:44:57 UTC I was expecting that actual lift off
would be between 21:44:58 and 21:44:59 UTC.

If I had to guess 21:44:57.10 sounds like a screen grab of T=0
rather than lift off?

Plus range lift off times are usually quoted to the millisecond in the form
requested by Satori.

Thanks

Carl

When he said "launch time", I assumed he meant MET = 0 (mission elapsed time), not liftoff time, because he only did not fill in the .XXX
Actual liftoff time can only be determined from post flight analyses.  There is no breakwire.

The time came from the Orbital Parameter Message (OPM) which lists the epoch of MET=0 in UTC time.

The second and third decimal place in the second also is determined during post flight assessment.


I'm really looking for the '.XXX'.

Online Chris Bergin

On to the RNDZ and Berthing (and Berthed Ops) thread later today. Will set up and link when ready.

Online Targeteer

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Atlas Common Core Booster re-entry sighted?

Today's edition of Spaceweather.com reports that the CCB re-entry was (most likely) observed from Halifax, NS.

Also, this observation from SeeSat-l: http://www.satobs.org/seesat/Dec-2015/0040.html

(Attached map image is also from the Spaceweather.com article.)

Dang, missed it!

http://www.cbc.ca/news/canada/nova-scotia/fireballs-actually-rockets-reentering-atmosphere-1.3354598

Best quote heard during an inspection, "I was unaware that I was the only one who was aware."


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