r/spacex • u/rSpaceXHosting Host Team • Jun 28 '21

Live Updates r/SpaceX Transporter-2 Launch Discussion and Updates Thread!

Welcome to the r/SpaceX Transporter-2 Launch Discussion and Updates Thread!

I'm u/hitura-nobad, your host for this launch.

Launch target: June 30 19:31 UTC (3:31 PM EDT)
Backup date TBA, typically the next day
Static fire Completed
Customer multiple
Payload multiple
Payload mass unknown
Deployment orbit ~500 km x ~97°, SSO
Vehicle Falcon 9 v1.2 Block 5
Core 1060
Past flights of this core 7 (GPS III SV03, Starlink-11, 14, 18, 22, 24, Türksat 5A)
Launch site SLC-40, Cape Canaveral Space Force Station, Florida
Landing LZ-1
Mission success criteria Successful deployment of payloads into contracted orbit

r/SpaceX Launch Weather Review

(15:10 UTC)

Weather-wise, so far everything looks pretty good, with showers, storms and cloud debris well away from the zone around the pad.

However, on days like these where the main threats are primarily diurnal convection which evolves quickly and unpredictably, we'll only really get a better idea within an hour or two from launch, at least beyond the 45th's mesoscale forecast and 70% GO.

(17:00 UTC)

With less than two hours to go until launch, the weather is still looking pretty good around the pad, better than yesterday so far, with showers and storm cells still keeping generally well clear of the 10 nmi/19 km zone around the pad, and like yesterday, cirrus blowoff from storm anvils to the west causing high-level cloudiness but seemingly well removed from their source such that they should not preculde launch.

(18:30 UTC)

Looks like there's just one modest cell that's the problem, that looks to pass directly over the pad. It should be on track to clear the area by the new scheduled launch time, but there are a few others downstream that may intrude on the party.

(by u/CAM-Gerlach)

Timeline

Time Update
T+58:07 Deployment starts
T+54:45 SECO2
T+54:44 Second stage relight
T+8:49 SECO and Norminal Orbital Insertion
T+8:31 Landing success
T+8:02 Landing startup
T+7:12 Reentry shutdown
T+6:50 Reentry startup
T+3:53 Fairing separation
T+3:45 Gridfins deployed
T+3:30 Boostback shutdown
T+2:46 Boostback startup
T+2:33 Second stage ignition
T+2:28 Stage separation
T+2:25 MECO
T+1:12 Max Q
T-0 Liftoff
T-60 Startup
T-3:30 Strongback retract
T-7:04 Engine Chill
T-12:51 Webcast live
T-20:09 20 minute vent
T-37:44 GO for Propellant load
T-1h 17m Now targeting 3:31 p.m. EDT for launch due to weather
^ 30 June Attempt ^
T-11 Scrub
T-11 Hold
T-7:00 Engine Chill
T-12:08 Webcast live
T-26:54 Fueling underway
2021-06-24 09:00:00 UTC Thread goes live

Watch the launch live

Stream Link
Official SpaceX Stream https://www.youtube.com/watch?v=sSiuW1HcGjA
Mission Control Audio TBA

Stats

☑️ 123rd Falcon 9 launch all time

☑️ 82nd Falcon 9 landing (if successful)

☑️ 104th consecutive successful Falcon 9 launch (if successful; excluding Amos-6)

☑️ 20th SpaceX launch this year

☑️ 8th flight of first stage B1060

Unofficial lists of individual spacecraft on this launch:

Resources

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u/Decronym Acronyms Explained Jun 28 '21 edited Jul 02 '21

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters More Letters
AFTS Autonomous Flight Termination System, see FTS
ASDS Autonomous Spaceport Drone Ship (landing platform)
ASOG A Shortfall of Gravitas, landing barge ship under construction
COPV Composite Overwrapped Pressure Vessel
CRS Commercial Resupply Services contract with NASA
CoG Center of Gravity (see CoM)
CoM Center of Mass
FAA Federal Aviation Administration
FTS Flight Termination System
GSE Ground Support Equipment
ICBM Intercontinental Ballistic Missile
IFR Instrument Flight Rules
JRTI Just Read The Instructions, Pacific Atlantic landing barge ship
KSC Kennedy Space Center, Florida
KSP Kerbal Space Program, the rocketry simulator
LC-13 Launch Complex 13, Canaveral (SpaceX Landing Zone 1)
LEO Low Earth Orbit (180-2000km)
Law Enforcement Officer (most often mentioned during transport operations)
LOX Liquid Oxygen
LZ-1 Landing Zone 1, Cape Canaveral (see LC-13)
NORAD North American Aerospace Defense command
NOTAM Notice to Airmen of flight hazards
NSF NasaSpaceFlight forum
National Science Foundation
OCISLY Of Course I Still Love You, Atlantic landing barge ship
RP-1 Rocket Propellant 1 (enhanced kerosene)
RTLS Return to Launch Site
SECO Second-stage Engine Cut-Off
SSO Sun-Synchronous Orbit
TFR Temporary Flight Restriction
TLE Two-Line Element dataset issued by NORAD
ULA United Launch Alliance (Lockheed/Boeing joint venture)
VFR Visual Flight Rules
Jargon Definition
Starlink SpaceX's world-wide satellite broadband constellation
cryogenic Very low temperature fluid; materials that would be gaseous at room temperature/pressure
(In re: rocket fuel) Often synonymous with hydrolox
hydrolox Portmanteau: liquid hydrogen fuel, liquid oxygen oxidizer
iron waffle Compact "waffle-iron" aerodynamic control surface, acts as a wing without needing to be as large; also, "grid fin"
scrub Launch postponement for any reason (commonly GSE issues)
Event Date Description
CRS-7 2015-06-28 F9-020 v1.1, Dragon cargo Launch failure due to second-stage outgassing

Decronym is a community product of r/SpaceX, implemented by request
32 acronyms in this thread; the most compressed thread commented on today has 114 acronyms.
[Thread #7109 for this sub, first seen 28th Jun 2021, 14:58] [FAQ] [Full list] [Contact] [Source code]