Issue 25

China Launches 4 Jilin-1 (Gaofen-3) Satellites

03 Jul 2021: China launched a Long March 2D from Taiyuan sending the Jilin-1 01B, Xingshidai-10 and 3 x Jilin-1/Gaofen-03D satellites into orbit - With this launch Charming Globe (CGST) has now launched 31 Jilin-1 satellites , of which 29 have reached orbit. The 31 include 2 test satellites, 8 'Shipin' video satellite…

03 Jul 2021: China launched a Long March 2D from Taiyuan sending the Jilin-1 01B, Xingshidai-10 and 3 x Jilin-1/Gaofen-03D satellites into orbit

– With this launch Charming Globe (CGST) has now launched 31 Jilin-1 satellites, of which 29 have reached orbit. The 31 include 2 test satellites, 8 ‘Shipin’ video satellites, 2 ‘Guanpu’ spectral satellites, 2 ‘Kuanfu’ wide-FOV, and 17 hi-resolution satellites.

CGST stated goal is to reach 60 satellites on orbit in 2021.

– The Jilin-1B/Wideband-01B is the second in a series of Jilin-1 satellites. Also known as Kuanfu-1 (which means Wideband-1), it is a high resolution video imaging satellite. It can collect UHD (4K) color video imagery with a resolution better than 1m. The satellite has “gaze observe” capabilities amongst its multiple imaging modes. It is able to detect light over a visible range of 437-720nm, according to the manufacturer and can image an area of ground of size 22km by 4.5km.

– The size of the satellite is 1.23m x 0.64m x 2.104m, and has a mass of approximately 230kg.

– A previous Jilin-1B Wideband satellite was launched in January 15, 2020, and went into an orbit of 477km x 492km, with an inclination of 97.34°.

– The 3 Jilin-1/Gaofen-03D satellites launched are the 4th instance of high resolution video satellites. Gaofen-03A was a single demonstration satellite. Gaofen-03B consists of 6 satellites, and Gaofen-3C consists of three. Gaofen-03B and -03C satellites were all launched together on 15 Sep 2020, on a Long March 11 rocket.

– Each Jilin-1 has a mass of 42kg. Known as “push broom” scanning satellites, they use a line of sensing elements perpendicular to the direction of flight. In panchromatic mode, the pixel resolution is better than 1.06m, and in multi-spectral mode the resolution is said to be better than 4.24m.

– The newest satellites are in a near circular orbit with an apogee of 540km and perigee of ~528km. They are in a sun-synchronous orbit with an inclination of 97.54°.

With funding secured (CGSTL raised $375M (US) in Nov 2020) and an established manufacturing processes, CGSTL has reached “batch production” capability. CGSTL is China’s leading commercial earth observation company and is positioning itself to compete in the global market for earth sensing services. With increasing numbers of satellites on orbit, CGSTL is able to reduce the time required to image any area of interest on the Earth’s surface. The desired end-state is a constellation capable of capturing and transmitting an image anywhere on Earth in 10 minutes or less. In addition to promising 60 satellites on orbit by the end 2021, CGSTL has publicly committed to completing their 138 earth observation satellite constellation during the 14th 5 Year Plan (2021-2025).

Issue 25 - China Launches 4 Jilin-1 (Gaofen-3) Satellites

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