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HEAD 1, 2A, 2B, 2C, 2D, 2E, 2F, 3, 4, 5 (Hede 1, 2A, 2B, 2C, 2D, 2E, 2F, 3, 4, 5)

HEAD 1 [CAST]

HEAD or Hede are Chinese commercial satellites by HEAD Aerospace for their Skywalker constellation to provide data collection services and to track ships receiving their AIS (Automated Identification System) signals.

The three-axis stabilized satellites are built by SAST (Shanghai Academy of Spaceflight Technology) and features an high performance AIS-receiver being able to process 2 million AIS short messages per 24 hours and to identify 60000 ships. Future satellites will feature VEDS and ADS-B payloads for global ship detection and airplane monitoring services.

The Skywalker constellation is planned to consist of 48 satellite. 12 of them are to be in Sun-synchronous orbits, while the remainig 36 will form a Walker-δ constellation with 6 different orbital planes in 700 km 50 LEO with an orbit phase difference of 60.

HEAD 1 was launched as a piggy-back payload on a CZ-4C sharing the ride with the main passenger FY 3D.

Nation: China
Type / Application: Communication M2M/IoT, traffic monitoring
Operator: HEAD Aerospace
Contractors: SAST
Equipment: high performance AIS-receiver
Configuration:
Propulsion:
Power: 2 deployable solar arrays, batteries
Lifetime: 2-3 years
Mass: 45 kg
Orbit: 796 km 809 km, 98.65 (#1); 495 km 511 km, 97.37 (#2A, 2B); 487 km 502 km, 97.29 (#4); 484 km 501 km, 97.32 (#5)
Satellite COSPAR Date LS Launch Vehicle Remarks
HEAD 1 (Hede 1) 2017-072B 14.11.2017 TY LC-9 CZ-4C with FY 3D
HEAD 2A (Hede 2A) 2019-087A ? 07.12.2019 TY LC-16 Kuaizhou-1A with HEAD 2B, TY 16, TY 17, Tianqi 4A, Tianqi 4B
HEAD 2B (Hede 2B) 2019-087B ? 07.12.2019 TY LC-16 Kuaizhou-1A with HEAD 2A, TY 16, TY 17, Tianqi 4A, Tianqi 4B
HEAD 2A (Hede 2A) 2019-087A ? 07.12.2019 TY LC-16 Kuaizhou-1A with HEAD 2B, TY 16, TY 17, Tianqi 4A, Tianqi 4B
HEAD 2C (Hede 2C) - 2022 Jq LP-43/95B Kuaizhou-1A with HEAD 2D
HEAD 2D (Hede 2D) - 2022 Jq LP-43/95B Kuaizhou-1A with HEAD 2C
HEAD 2E (Hede 2E) 2021-091E ? 14.10.2021 TY LC-9 CZ-2D (2) with CHASE (Xihe), QX 1, Tianshu 1, JTSY, HEAD 2F, Guidao Daqi Midu TSW, SSS 1, SSS 2A, Tianyuan 1, Jinzijing 2
HEAD 2F (Hede 2F) 2021-091H ? 14.10.2021 TY LC-9 CZ-2D (2) with CHASE (Xihe), QX 1, Tianshu 1, JTSY, HEAD 2E, Guidao Daqi Midu TSW, SSS 1, SSS 2A, Tianyuan 1, Jinzijing 2
HEAD 2G (Hede 2G, Jiaotong 4) 2022-090 04.08.2022 TY LC-9 CZ-4B with TECIS (Guomang), Minhang Shaonian
HEAD 3 (Hede 3) - 202x with ?
HEAD 4 (Hede 4) 2020-034A 31.05.2020 Jq LC-43/94 CZ-2D (2) with Gaofen 9-02
HEAD 5 (Hede 5) 2020-039C 17.06.2020 Jq LC-43/94 CZ-2D (2) with Gaofen 9-03, ZDPS 3A

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