任务档案 · MISSION

GSAT-20 (GSAT-N2)

SpaceX · 猎鹰 9 Block 5 · 40 号发射工位 (SLC-40)

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任务简介

GSAT-20 是一颗印度地球静止轨道 Ka 波段高通量通信卫星。 GSAT 20 据称基于 I-6K 统一模块化总线建造，配备 Ka 波段高通量通信有效载荷，吞吐量达 70 Gbps，利用多个点波束为印度地区提供宽带服务。它将是首颗完全采用电推进（EP）的卫星，效率可比化学推进高出五到六倍。它将是首颗使用电推进从地球静止转移轨道（GTO）进入地球同步轨道（GSO）的 ISRO 制造卫星。

原文

↗ SpaceX

GSAT-20 is an Indian geostationary Ka-band high-throughput communications satellite. GSAT 20 is reportedly built on the I-6K unified modular bus and features a Ka-band high-throughput communications payload with 70 Gbps throughput utilizing multiple spot beams providing broadband services across the Indian region. It will be the first fully Electric Propulsion/EP enabled satellite which can be five to six times more efficient than chemical-based propulsion. It will be the first ISRO made satellite to move from Geostationary transfer orbit to Geosynchronous orbit using Electric Propulsion.

飞行时间线 Flight Timeline23 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

燃料箱增压Tank Press

Fuel tanks are pressurized to flight levels

T−01:00

自动倒数启动Startup

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

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+01:11

最大动压点Max-Q

Maximum dynamic pressure

T+02:26

主发动机关机MECO

Cut-off of the main engine

T+02:30

二级分离Stage 2 Separation

Separation of the second stage from the first

T+02:36

二级发动机第一次启动SES-1

First start of the second engine

T+03:17

整流罩分离Fairing Separation

Separation of the payload fairing

T+06:13

再入减速点火Entry Burn Startup

Start of the atmospheric entry burn

T+06:39

再入减速关机Entry Burn Shutdown

End of the atmospheric entry burn

T+07:55

一级着陆减速点火Stage 1 Landing Burn

Start of the first stage landing burn

T+07:56

二级发动机第一次关机SECO-1

First cut-off of the second engine

T+08:20

一级着陆Stage 1 Landing

Landing of the first stage

T+26:41

二级发动机第二次启动SES-2

Second start of the second engine

T+27:47

二级发动机第二次关机SECO-2

Second cut-off of the second engine

T+33:58

载荷分离Payload Separation

Final deployment of the payload from the rocket

任务更新16 条

03:1911/19

Cosmic_Penguin · 11/18

Launch success with satellite in contact.