About SDA Tranche 1 Transport Layer A
Tranche 1 Transport Layer A is one of six missions by the United States Space Force Space Development Agency (SDA) for the Proliferated Warfighter Space Architecture (PWSA) Tranche 1 Transport Layer constellation, which will provide assured, resilient, low-latency military data and connectivity worldwide to the full range of warfighter platforms from Low Earth Orbit satellites. The constellation will be interconnected with Optical Inter-Satellite Links (OISLs) which have significantly increased performance over existing radio frequency crosslinks. It is expected to operate over Ka band, have stereo coverage and be dynamically networked for simpler hand-offs, greater bandwidth and fault tolerance. This launch carries 21 satellites manufactured by Northrop Grumman.
Orbital Attempt
#7,412
SpX Mission
#736
Pad Launch
#301
Location Launch
#917
Designator
2026-231
Weather GO
80%
Falcon 9 is a two-stage rocket designed and manufactured by SpaceX for the reliable and safe transport of satellites and the Dragon spacecraft into orbit. The Block 5 variant is the fifth major interval aimed at improving upon the ability for rapid reusability.
Length
70 m
Diameter
3.65 m
Launch Mass
549 t
Thrust
7,607 kN
Capacity
22,800 kg
Capacity
8,300 kg
Launch Cost
$52M
Reusable
Yes
Maiden Flight
2018
Fastest Turnaround
38m 31s
Total Launches
644
Successful
643
Failed
1
Consecutive Success
346
Maiden flight: May 11, 2018
Space Exploration Technologies Corp., known as SpaceX, is an American aerospace manufacturer and space transport services company headquartered in Hawthorne, California. It was founded in 2002 by entrepreneur Elon Musk with the goal of reducing space transportation costs and enabling the colonization of Mars. SpaceX operates from many pads, on the East Coast of the US they operate from SLC-40 at Cape Canaveral Space Force Station and historic LC-39A at Kennedy Space Center. They also operate from SLC-4E at Vandenberg Space Force Base, California, usually for polar launches. Another launch site is being developed at Boca Chica, Texas.
Founded
2002
Administrator
CEO: Elon Musk
Total Launches
743
Successful
728
Failed
15
Pending
137
Consecutive Success
228
Space Launch Complex 4 East (SLC-4E) is a launch site at Vandenberg Space Force Base, California, U.S. The pad was previously used by Atlas and Titan rockets between 1963 and 2005. The pad was built for use by Atlas-Agena rockets, but was later rebuilt to handle Titan rockets.
Total Launches
306
Orbital Attempts
306
Fastest Turnaround
2d 7h
Vandenberg Space Force Base is a United States Space Force Base in Santa Barbara County, California. Established in 1941, Vandenberg Space Force Base is a space launch base, launching spacecraft from the Western Range, and also performs missile testing. The United States Space Force's Space Launch Delta 30 serves as the host delta for the base, equivalent to an Air Force air base wing. In addition to its military space launch mission, Vandenberg Space Force Base also hosts space launches for civil and commercial space entities, such as NASA and SpaceX.
Timezone
America/Los_Angeles
Local Launch Time
Oct 10, 2026, 12:39 AM
Total Launches
922
Total Landings
37
Coordinates
34.7513, -120.5202
Watching in person?Viewing guide for Vandenberg SFB
Oct 10, 2026, 7:39 AM
Second
20 updates
Launch success.
SourceLiftoff!
SourceUnofficial Re-stream by SPACE AFFAIRS has started
SourceTweaked T-0.
SourceTweaked T-0.
SourceDelayed to NET October 10.
SourceDelayed to NET October 9.
SourceDelayed to NET October 8.
SourceTweaked T-0.
SourceUnofficial Re-stream by SPACE AFFAIRS has started
SourceUnofficial Re-stream by SPACE AFFAIRS has started
SourceUnofficial Re-stream by SPACE AFFAIRS has started
SourceConfirmed rescheduled for October 6.
SourceScrubbed for the day.
SourceHold at T-00:58.
SourceUnofficial Re-stream by SPACE AFFAIRS has started
SourceNow targeting Oct 05 at 08:18 UTC
SourceTweaked T-0.
SourceNow targeting Oct 05 at 08:17 UTC
SourceGO for launch.
SourceNET October 5 per marine navigation warnings, TBC.
SourceNET October.
SourceNET September.
SourceNET mid-February.
SourceDelayed to NET early 2026.
SourceNET March 2025.
SourceNET late 2024.
SourceAdding launch
Source
