Dalian-1 Lianli Spacecraft - Nanosats Database

Spacecraft	Dalian-1 Lianli (Dalian-1/Lianli)
Spacecraft type	CubeSat
Units or mass	12U
Mass in kg	17 kg
Status	Reentry 2024-04-23. Was operational (Orbit raised over 20 km and picture shared by Xiaozhou Yu on LinkedIn on 2024-03-28)
Launched	2023-05-10
NORAD ID	58816
Deployer	Ultralight Multiple Satellites Deployers (UMSD)
Launcher	Long March 7 (Tianzhou)
Deployment	Deployed from Tianzhou on 2024-01-18
Organisation	Dalian University of Technology
Institution	Company
Entity	Commercial
Headquarters	China
Oneliner	Verify high-resolution remote sensing imaging, domestic high-reliability OpenHarmony operating system, advanced satellite components and 3D printing technology.
Description	Dalian 1-Lianli satellite is a 12U high-resolution earth remote sensing cube satellite with a mass of 17kg. Its main function is to verify high-resolution remote sensing imaging, domestic high-reliability OpenHarmony operating system, advanced satellite components and 3D printing technology. A series of innovative technologies such as ultra-lightweight deployer. According to Professor Xia Guangqing, chief designer of the satellite and dean of the School of Aeronautics and Astronautics of the Department of Vehicle Engineering and Mechanics , the main payload of the Dalian-1-Lianli satellite is a high-resolution multispectral camera. The camera has a total of 5 spectral bands, including full spectrum and multispectral, and can Achieve low-cost sub-meter high-resolution ocean/Earth observation in orbit. The use of the OpenHarmony operating system and the comprehensive solution of domestic processing chips has greatly improved the performance and reliability of the system. Different from the toxic hydrazine propellant used in traditional satellite attitude and orbit control power systems, this satellite uses an innovative hydroxylamine nitrate (HAN) single-component module propulsion system, which is green and non-toxic, has high energy, low power consumption, Features such as pre-packaging greatly improve the rapid maneuverability of micro-nano satellites in orbit. Before the rocket is launched, the satellite is installed on the outside of the spacecraft through Ultralight Multiple Satellites Deployers (UMSD). "The deployer's high-reliability memory alloy unlocking device, high-performance temperature control and temperature collection circuit, satellite power charging circuit, and telemetry data acquisition circuit and other functional units can overcome the challenges caused by space factors such as high and low temperatures, thermal vacuum, and atomic oxygen corrosion. It is difficult to ensure the reliability of long-term on-orbit storage and release of satellites." said Professor Yu Xiaozhou, chief commander of the satellite. According to the plan, after the Tianzhou-6 cargo spacecraft completes the rendezvous and docking with the space station, it will choose an opportunity to release the Dalian-1-Lianli satellite. Thereafter, the 7.3mX band ground measurement and control station of Dalian University of Technology will cooperate with the satellite to implement mission uplink and data downlink measurement and control operations, and conduct a series of scientific experiments. The deployer structure of "Dalian 1-Lianli" consists of multiple components such as the main frame and the hatch. The structure of the main frame is approximately 400 mm × 400 mm × 500 mm in size with a minimum wall thickness of 1 mm. The structure was manufactured from AlSi10Mg on a BLT-S800 equipped with eight 500 W lasers. According to BLT the dimensional accuracy of the key parts of the final production met the operating requirements of the satellite in full to overcome space factors such as high-low temperatures, thermal vacuum, and atomic oxygen corrosion, ensuring the reliability of long-term in-orbit storage before release. AMU is the first single machine using OpenHarmony real-time operating system. In May 2023, the 12U CubeSat developed by our team carried AMU successfully launched into orbit with China’s cargo spacecraft at Wenchang Space Launch Site.
Results	Dalian-1/Lianli was launched on May 10, 2023, and was successfully deployed into orbit from the Tianzhou-6 cargo spacecraft on January 18, 2024. A series of HAN propulsion system tests have shown the orbit has been lifted from a perigee of 325.7km and an apogee of 352.6km on February 26th at 02:00:00 Beijing time to a perigee of 340.7km and an apogee of 373.2km on February 29th at 02:00:00 Beijing time, resulting in an average orbital height increase of approximate 18km (considering an orbital decay of approximate 1km per day, the actual orbital height increase would exceed 20km). Another payload is a high-resolution camera, a resolution is less than 1m(PAN) and 4 meter (multiple spectrum) @500km.
Notes	NB! The size of the satellite needs further verification. Extrusions look much larger than a typical CubeSat.
Sources	[1] [2] [3] [4] [5] [6] [7] [8] [9]
Photo sources	[1] [2] [3]
Space photos	[1]

Last modified: 2024-12-15