TDRS-M – Atlas V 401 – Канаверал SLC-41 – 18.08.2017 12:29 UTC

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Stephen Clark‏ @StephenClark1 9 мин. назад

NASA's Greg Williams, in NASA Advisory Council committee hearing, says replacement of damaged TDRS-M omni antenna is to occur today.

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Chris B - NSF‏ @NASASpaceflight 3 мин. назад

So currently TDRS-M wants the 10th, as we previously noted. Dragon will take the 14th. With Caveats. Relationship Status: It's Complicated.

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https://www.nasaspaceflight.com/2017/07/tdrs-priority-crs-12-dragon-launch-dates-realign/

TDRS-M given priority over CRS-12 Dragon as launch dates realign
July 26, 2017 by Chris Gebhardt

Launch delays are sometimes part of the equation in determining when specific missions launch in relation to each other. Sometimes, those delays occur to missions for the same agency, as is now the case with TDRS-M and CRS-12. With replacement operations to the TDRS-M omni antenna underway, NASA/United Launch Alliance has requested 10 August for the TDRS-M launch and SpaceX has requested 14 August for the CRS-12 Dragon launch to the International Space Station.



TDRS-M:

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Determining mission priority for two missions for a single agency, as is now the case for TDRS-M and the CRS-12 Dragon resupply mission to the Station, can be somewhat tricky.



Sometimes, launch contracts drive the priority decision.  Other times, the immediate need for a particular mission or its impact on subsequent missions/events drives which one gets priority. Still other times, the agency providing the launch vehicle and the launch service is instrumental – based on their own schedules and needs – in determining priority.

As the increasingly busy launch schedule off the Eastern Range in Florida this year has proven, all companies involved in the launch business are more than willing to negotiate launch dates with each other and to act as good neighbors when delays occur – which happen to every launch provider.
 
In the particular case of TDRS-M and CRS-12, priority determination came down to an assessment of the Omni antenna replacement on TDRS-M – an antenna that was damaged during final processing at the Astrotech facility in Titusville.  That antenna replacement schedule revealed a No Earlier Than (NET) launch opportunity on 10 August 2017 on a United Launch Alliance Atlas V rocket.

The issue then became that 10 August was the already requested and range approved launch date for the CRS-12 Dragon as well as the launch date the ISS Program had for crew scheduling and an upcoming Russian EVA on the Station.

Nonetheless, as both missions are NASA flights, the agency had the ability to internally determine which mission had priority over the other. Given an identical NET launch dates for both missions, NASA opted to prioritize TDRS-M over CRS-12.



As noted to the NASA Advisory Council (NAC) yesterday by Greg Williams, Deputy Associate Administrator for Policy and Plans in NASA's Human Exploration and Operations Mission Directorate, replacement of the Omni antenna on TDRS-M occurred Monday at the Astrotech facility, with full up testing of the antenna now underway.

Replacement of the antenna is a positive step toward the requested 10 August launch of TDRS-M – even though NASA has yet to publicly announce that as the target launch date.

Nevertheless, according to Range information acquired by NASASpaceflight.com and available in L2, on Tuesday ULA requested 28 July for the MDR (Mission Dress Rehearsal) of the Atlas V and 10 August for launch of TDRS-M in a widow extending from 08:35 to 09:15 EDT (12:35 – 13:15 GMT/UTC).

Nonetheless, NASA is leaving open the possibility of a further slip to TDRS-M pending final antenna replacement testing. Should the satellite incur an additional delay, NASA will reevaluate which mission has priority – a discussion, should it become necessary, that will have an added element to the equation: the fact that CRS-12 Dragon has to launch at least two days before an upcoming 17 August Russian EVA at the Station or be delayed until "several days after" that EVA is complete.

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(Images: SpaceX, NASA, Space360 and L2 artist Nathan Koga – The full gallery of Nathan's (Starliner to SpaceX Dragon to MCT, SLS, Commercial Crew and more) L2 images can be *found here*)

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Stephen Clark‏ @StephenClark1 17 мин. назад

Updates to US launch schedule include new target dates for Falcon 9/CRS 12 (Aug. 14) and Atlas 5/TDRS M (Aug. 20). https://spaceflightnow.com/launch-schedule/ ...

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Что за безобразие? Почему ТДРС не на Флаконе?  
Слишком маловат для Флакона, чтоль?

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Spaceflight Now‏ @SpaceflightNow 38 мин. назад

VIDEOS: Atlas 5 rocket assembled to launch NASA's #TDRSM communications bird on Aug. 20 at 7:56 a.m. EDT (1156 GMT) https://spaceflightnow.com/2017/07/26/videos-atlas-5-rocket-assembled-to-launch-nasas-tdrs-m-bird/ ...
 
Video

Videos: Atlas 5 rocket assembled to launch NASA's TDRS-M bird

July 26, 2017 Justin Ray

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The United Launch Alliance Atlas 5 rocket that will boost NASA's latest communications relay satellite into space is targeting an Aug. 20 liftoff at 7:56 a.m. EDT (1156 GMT).

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The mission was delayed from Aug. 3 after a crane incident damaged the craft's Omni antenna in the cleanroom, requiring replacement.

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The two stages of the Atlas 5 rocket arrived by sea on June 26, sailing into Port Canaveral from the manufacturing plant in Decatur, Alabama, aboard the Delta Mariner cargo ship.

On Wednesday, July 12, United Launch Alliance workers began stacking the launch vehicle, designated AV-074, by erecting the first stage aboard the mobile launch platform parked inside the VIF.

The combined interstage, Centaur upper stage and boattail of the fairing, all pre-integrated together off-site, was hoisted atop the first stage on July 13.

The 191-foot-tall rocket will be wheeled to the pad on Aug. 18 at 9 a.m.

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Теперь официально

NASA TDRS‏Подлинная учетная запись @NASA_TDRS 31 мин. назад

Pending range approval, NASA, Boeing & United Launch Alliance (ULA) are now targeting Aug. 20 for the #TDRSM launch

https://blogs.nasa.gov/tdrs/2017/07/26/tdrs-m-status-update-july-26-2017/
или
https://blogs.nasa.gov/kennedy/2017/07/26/tdrs-m-status-update-july-26-2017/

TDRS-M Status Update – July 26, 2017
Posted on July 26, 2017 at 7:16 pm by Amber Philman.

NASA has provided Boeing concurrence to remove and replace the Tracking and Data Relay Satellite's (TDRS-M) Omni S-band forward antenna. Pending Eastern Range approval, NASA, Boeing, and United Launch Alliance (ULA) are now targeting Aug. 20 for launch. A 40-minute launch window would open at 7:56 a.m. EDT. This new date allows for time to replace the antenna, which was damaged earlier this month while Boeing was conducting final spacecraft closeout activities at Astrotech Space Operations in Titusville, Florida. TDRS-M will launch atop an ULA Atlas V rocket from Cape Canaveral Air Force Station in Florida.

This entry was posted in TDRS-M on July 26, 2017 by Amber Philman.

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ULA опубликовал Mission Overview:

av_tdrsm_mob.pdf - 2794078 B, 2 стр

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Chris B - NSF‏ @NASASpaceflight 17 мин. назад

SpaceX Falcon 9 CRS-12 Dragon launch now August 13 - Range Approved. Atlas V with TDRS-M now August 18 (Under Review).

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https://blogs.nasa.gov/tdrs/2017/08/07/tdrs-m-flight-ready-aug-18-launch-date-approved/
или
https://blogs.nasa.gov/kennedy/2017/08/07/tdrs-m-flight-ready-aug-18-launch-date-approved/

TDRS-M Flight Ready, Aug. 18 Launch Date Approved
Posted on August 7, 2017 at 5:39 pm by Anna Heiney.

The Omni S-band antenna on NASA's Tracking and Data Relay Satellite (TDRS-M) has been successfully removed and replaced at Astrotech Space Operations in Titusville, Florida. An unrelated electrostatic discharge incident has also been resolved, and launch processing has resumed.  The spacecraft has been moved from the fueling stand and is now mated to the launch vehicle adapter as part of integrated operations with ULA.

The TDRS-M spacecraft is flight ready, and the Eastern Range has recently approved Aug. 18 as the launch date. NASA, Boeing, and United Launch Alliance (ULA) are targeting a 40-minute launch window that would open at 8:03 a.m. EDT. TDRS-M will launch on an ULA Atlas V rocket from Cape Canaveral Air Force Station in Florida.

This entry was posted in TDRS-M on August 7, 2017 by Anna Heiney.

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Spacenews360‏ @SpaceNews360 40 мин. назад

Five days after LC 39 A launch #TDRS #AtlasV lifts off. Repairs completed, encapsulation wrapped up and now a slow trip to the VIF at #LC41

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Spacenews360‏ @SpaceNews360 2 ч назад

En route #TDRS has left the building. Bound for the VIF for today's mating with the #AtlasV at LC-41 @ulalaunch

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Scott M‏ @Restrantek 5 ч назад

Nice to see you in the wee morning @NASA_TDRS #TDRSM rolling out to SLC41 for mating with mighty #AtlasV @ulalaunch @LockheedMartin @NASA

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Tory Bruno‏Подлинная учетная запись @torybruno 2 ч. назад

#TDRSM is at the pad for integration. Looking forward to taking her to space soon

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Spaceflight Now‏ @SpaceflightNow 3 ч. назад

NASA's #TDRSM spacecraft mounted atop Atlas 5 launch vehicle for Aug. 18 ascent to space. Our launch fact sheet: https://spaceflightnow.com/2017/08/09/av-074tdrs-m-launch-fact-sheet/ ...

AV-074/TDRS-M launch fact sheet

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Spacenews360‏ @SpaceNews360 7 ч. назад

TDRS-M Inside The Vertical Integration Facility https://spacenews360.com/?p=6449  via @Space News 360



7 ч. назад

Update: The #TDRSM mated to #AtlasV this afternoon.