任务档案 · MISSION

SDA Tranche 1 Transport Layer B

SpaceX · 猎鹰 9 Block 5 · 4E 号发射工位 (SLC-4E)

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任务成功

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任务简介

Tranche 1 传输层 B 是美国太空军太空发展局（SDA）为“扩散式作战人员太空架构”（PWSA）Tranche 1 传输层星座执行的六次任务之一，该星座将从低地球轨道卫星向全球各类作战平台提供可靠、弹性、低延迟的军事数据和连接。该星座将通过光学星间链路（OISL）互联，其性能相比现有射频交叉链路显著提升。预计将在 Ka 波段运行，具备立体覆盖能力，并采用动态组网以实现更简便的切换、更大的带宽和容错性。本次发射搭载了由 York Space Systems 制造的 21 颗卫星。

原文

↗ SpaceX

Tranche 1 Transport Layer B 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 York Space Systems.

飞行时间线 Flight Timeline21 节点

T−38:00

加注决议通过GO for Prop Load

Launch director verifies go for propellant load

T−35:00

一级 LOX (液氧) 加注Stage 1 LOX Load

Start of liquid oxygen loading in the first stage

T−35:00

推进剂加注开始Prop Load

Start of propelland loading

T−16:00

二级 LOX (液氧) 加注Stage 2 LOX Load

Start of liquid oxygen loading in the second stage

T−07:00

发动机预冷Engine Chill

Start of engine chilling

T−01:00

自动倒数启动Startup

The onboard computer takes control over the countdown and runs last checks

T−01:00

燃料箱增压Tank Press

Fuel tanks are pressurized to flight levels

T−00:45

发射决议通过GO for Launch

Launch director verifies go for launch

T−00:03

点火Ignition

Start of the engine ignition sequence

T+00:00

升空Liftoff

First upwards movement of the rocket

T+01:12

最大动压点Max-Q

Maximum dynamic pressure

T+02:30

主发动机关机MECO

Cut-off of the main engine

T+02:34

二级分离Stage 2 Separation

Separation of the second stage from the first

T+02:42

二级发动机第一次启动SES-1

First start of the second engine

T+06:24

再入减速点火Entry Burn Startup

Start of the atmospheric entry burn

T+06:47

再入减速关机Entry Burn Shutdown

End of the atmospheric entry burn

T+08:12

一级着陆减速点火Stage 1 Landing Burn

Start of the first stage landing burn

T+08:36

一级着陆Stage 1 Landing

Landing of the first stage

T+08:38

二级发动机第一次关机SECO-1

First cut-off of the second engine

T+56:43

二级发动机第二次启动SES-2

Second start of the second engine

T+56:51

二级发动机第二次关机SECO-2

Second cut-off of the second engine

任务更新11 条

02:5409/11

Cosmic_Penguin · 09/10

Launch success.

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22:1209/10

Cosmic_Penguin · 09/10

Liftoff.

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21:5709/10

LL2 · 09/10

Unofficial Re-stream by SPACE AFFAIRS has started

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20:3509/10

hitura-nobad · 09/10

Now targeting Sep 10 at 14:12:11 UTC

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23:0609/09

Cosmic_Penguin · 09/09

Tweaked T-0.

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08:5009/05

Cosmic_Penguin · 09/05

GO for launch.

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22:3209/03

Cosmic_Penguin · 09/03

Added launch window.

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09:3208/14

Cosmic_Penguin · 08/14

NET September 10.

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21:5107/15

Cosmic_Penguin · 07/15

NET July.

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11:0303/08

Cosmic_Penguin · 03/08

NET late summer. (order of launches per https://sam.gov/opp/7111789df59149cd81596402c35e33d3/view P.12)

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20:3906/09

Jay · 06/09

Adding launch

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