Long March 4C — LLMpedia

Long March 4C
Name	Long March 4C
Country	People's Republic of China
Contractor	China Academy of Launch Vehicle Technology
Family	Long March
Status	Active
First	2015-01-??
Launches	multiple
Succeed	Long March 4B

Contents

Long March 4C Long March 4C is a Chinese orbital launch vehicle used for placing satellites into low Earth orbit, sun-synchronous orbit, and other trajectories supporting civilian, scientific, and meteorological missions. Developed by the China Academy of Launch Vehicle Technology and operated from facilities including Jiuquan Satellite Launch Center and Taiyuan Satellite Launch Center, the launcher integrates technologies derived from earlier Long March variants and Chinese spaceflight programs such as Shenzhou program, Fengyun program, and collaborations with agencies like the China National Space Administration. Its missions have supported payloads tied to institutions including the National Satellite Meteorological Center, the Chinese Academy of Sciences, and commercial entities in the China Aerospace Science and Industry Corporation ecosystem.

Overview

The vehicle occupies a niche alongside vehicles like the Long March 2C, Long March 3B, Long March 6, and Kuaizhou series, offering mid-class lift capacity for polar and sun-synchronous missions analogous to international vehicles such as the Rokot and Dnepr derived systems. Programs like Gaofen, Yaogan, Beidou Navigation Satellite System, and experimental payloads from the Beijing Institute of Technology have influenced payload accommodations. Key Chinese aerospace institutions including the Institute of Mechanics, Chinese Academy of Sciences, China Aerospace Science and Technology Corporation, and the People's Liberation Army Strategic Support Force have intersected with operational planning, while international entities such as the United Nations Office for Outer Space Affairs and commercial operators observe mission profiles for applications in earth observation, remote sensing, and technology demonstration.

The launcher features a multi-stage architecture with cryogenic and hypergolic heritage comparable to designs from the Sino-foreign cooperation era and indigenous evolutions traceable to the Long March 2 and Long March 3 lineages. Propulsion elements derive from engines developed at institutes like the Beijing Institute of Aero Engines and the Aero Engine Corporation of China, and structural designs reference work by the China Academy of Aerospace Aerodynamics and the China Academy of Launch Vehicle Technology branches responsible for stage tanks, avionics, and guidance systems. Avionics integrate inertial navigation and telemetry subsystems developed alongside projects such as Tiangong space station avionics upgrades and guidance algorithms tested on Shenzhou missions. Materials research from the University of Science and Technology of China and the Harbin Institute of Technology influenced composite fairings and thermal protection compatible with payloads from the Chinese Academy of Sciences.

Development involved design bureaus and contractors including the China Academy of Launch Vehicle Technology, China Aerospace Science and Industry Corporation, and state research centers like the China Academy of Space Technology. Manufacturing facilities at sites linked to Jiuquan Satellite Launch Center and Taiyuan Satellite Launch Center utilized quality control standards influenced by programs such as Chang'e lunar probes and the Tiangong testbeds. Supply chains included component firms associated with the Ministry of Industry and Information Technology industrial base, and collaboration with academic partners like Tsinghua University and Peking University supported systems engineering, reliability modeling, and materials testing.

Launches have been conducted from complexes including Taiyuan Satellite Launch Center pad adaptations and Jiuquan Satellite Launch Center mobile gantries, with mission timelines intersecting with milestones from the Fengyun meteorological satellite series, the Gaofen high-resolution earth observation program, and technology-demonstration flights supporting the China Manned Space Program. Flight histories reference global tracking by organizations such as the Joint Space Operations Center and coverage in peer fora like the International Astronautical Congress. Mission planning and scheduling have involved coordination with entities including the National Remote Sensing Center of China and the Ministry of Finance for payload procurement and tasking.

Payloads launched include earth-observation satellites from the Gaofen series, reconnaissance platforms akin to Yaogan types, scientific instruments developed by the Chinese Academy of Sciences, and technology demonstrators from universities like the Harbin Institute of Technology and companies within the China Satellite Network Communications Co., Ltd. ecosystem. Missions have supported programs such as Beidou Navigation Satellite System augmentation, atmospheric research complementing Fengyun datasets, and cooperative projects observed by the Committee on the Peaceful Uses of Outer Space. Commercial payload customers include firms tied to the China Great Wall Industry Corporation and the China Aerospace Science and Technology Corporation commercial arms.

Primary launch sites include the Taiyuan Satellite Launch Center known for polar launches and the Jiuquan Satellite Launch Center with historical ties to the Shenzhou program; logistical and tracking support has been provided by the Xichang Satellite Launch Center network, the Xi'an Satellite Control Center, and tracking stations coordinated through the Chinese Deep Space Network. Ground support infrastructure leverages integration facilities associated with the China Academy of Launch Vehicle Technology and refurbishment centers influenced by practices from the Chang'e lunar program and the Tiangong mission complex.

Operational performance is benchmarked against payloads to sun-synchronous orbit and low Earth orbit with reliability statistics monitored by the China National Space Administration and independent analysts from institutions such as the Chinese Academy of Sciences and international observers at the European Space Agency. Reliability improvements reflect incremental changes derived from engine testing at centers like the China Aerospace Science and Industry Corporation test stands and materials upgrades informed by the Beijing Institute of Technology, contributing to mission success rates comparable to contemporaneous medium-lift vehicles.

Category:Rocketry