The Deep Space Exploration Laboratory released news on April 13 that as of the 12th, the Tiandu-1 and Tiandu-2 communication technology test satellites had successfully carried out high-reliability transmission and routing of the moon and the earth, and lunar orbit navigation space benchmark allogeneic calibration. Waiting for new technology trials. Calculation results based on telemetry data show that the test project can effectively improve the accuracy of spacecraft orbit determination around the moon, and the test design has important practical value.
After Tiandu-1 and Tiandu-2 were launched on March 20, after about 14 days of space flight, including mid-course correction, near-month braking, and orbital maneuvering around the moon, the double-star combination was launched on April 3. Successful separation of binary stars in mission orbit around the moon.

中国深空探测实验室4月13日发布消息称，截至12日，天都一号、二号通导技术试验星顺利开展了月地高可靠传输与路由、月球轨道导航空间基准异源标定等新技术试验。经遥测数据计算结果表明，试验项目能够有效提高航天器环月轨道定轨精度，试验设计具有重要实用价值。
天都一号、二号自3月20日发射升空后，经中途修正、近月制动、环月轨道机动等关键环节，历经约14天的太空飞行，双星组合体于4月3日在环月使命轨道成功实施双星分离。

On April 3, 2024, the binary star combination successfully separated the binary stars. Tiandu-1 image clip taken by Tiandu-2
On April 8, Tiandu-1 completed the flight orbit adjustment control as planned, and flew in formation with Tiandu-2 in a frozen orbit around the moon, with the distance between the two stars maintained at around 200 kilometers. The communication between the two satellites is normal, the posture is stable, and the energy is balanced, laying an important foundation for carrying out a series of communication technology test tasks.

2024年4月3日，双星组合体成功实施双星分离。天都二号拍摄的天都一号影像片段
4月8日，天都一号按计划完成飞行轨道调整控制，与天都二号在环月大椭圆冻结轨道编队飞行，双星距离维持在200公里附近。两星通信正常、姿态稳定、能源平衡，为开展系列通导技术试验任务奠定重要基础。

On April 8, 2024, Tiandu-2 took a photo of the Earth and the Moon. Moon imaging data in the far-infrared spectrum with a wavelength of 8~14 um. The smaller celestial body in the background is the Earth.
Tiandu 1 and 2, as the first satellites developed by the Deep Space Exploration Laboratory, carried out a series of new lunar communication and navigation tests, effectively verifying the key technologies related to lunar communication, and will provide the basis for the subsequent International Lunar Research Station and Queqiao Communication Provide strong support for the design and construction of remote integrated constellation systems.


2024年4月8日，天都二号拍摄地月合影图像。波长为8~14 um的远红外谱段月球成像数据，背景中较小的天体为地球
天都一号、二号作为深空探测实验室抓总研制的首发星，开展系列月球通信导航新技术试验，有效验证了月球通导相关关键技术，将为后续国际月球科研站、鹊桥通导遥综合星座系统的设计建设提供有力支撑。

Queqiao Telecom Comprehensive Constellation System
Since one side of the moon always faces away from the earth, a probe landing on the back of the moon is blocked by the moon itself and cannot directly achieve measurement and control communication and data transmission with the earth. The landing detection and sampling sites for the fourth phase of the lunar exploration project are mainly located in the south pole and far side of the moon. Therefore, relay stars with wider functions and stronger performance are needed to set up a new "relay communication station" from the moon to the earth. , to solve the communication and data transmission problems between the probe on the back of the moon and the earth.
On the eighth China Space Day in 2023, the two Queqiao communication technology test satellites were officially named "Tiandu-1" and "Tiandu-2". The "Tiandu-1" satellite weighs 61 kilograms and is equipped with Ka dual-band integrated communication devices, laser corner reflectors, space routers and other loads.

鹊桥通导遥综合星座系统
由于月球始终有一面背对地球，着陆在月球背面的探测器受到月球自身的遮挡，无法直接实现与地球的测控通信和数据传输。而探月工程四期的任务开展着陆探测以及采样地点主要位于月球南极和月球背面地区，因此需要功能更广、性能更强的中继星，架设起月球对地新的“中继通信站”，解决月球背面探测器与地球间的通信和数传问题。
在2023年第八个中国航天日上，两颗鹊桥通导技术试验卫星正式被命名为“天都一号”“天都二号”。“天都一号”整星重量61千克，配置了Ka双频段一体化通信机、激光角反射器、空间路由器等载荷。

Schematic diagram of the flight of the Tiandu Navigation Technology Test Star.
According to the planned goals, after the two stars "Tiandu 1" and "Tiandu 2" entered the earth-moon transfer orbit together with the Queqiao 2 lunar relay satellite, the two stars performed near-month braking and entered a large elliptical orbit around the moon. , in a large elliptical orbit around the moon, using satellite-to-ground laser ranging, inter-satellite microwave ranging and other methods to carry out high-precision lunar orbit determination technology verification.
The Deep Space Exploration Laboratory is a new technology research and development institution jointly established by the National Space Administration, Anhui Province, and the University of Science and Technology of China. Chen xiao, commander-in-chief of Tiandu Navigation Technology Experimental Satellite of the Deep Space Exploration Laboratory, said that these two small and micro test satellites will provide strong reference and basis for the subsequent establishment of China's Queqiao Navigation and Telecommunications Comprehensive Constellation System.

天都通导技术试验星飞行示意图。
按照计划目标，“天都一号”“天都二号”两颗星随鹊桥二号月球中继卫星一同进入地月转移轨道后，两颗星进行近月制动，进入环月大椭圆轨道，在环月大椭圆轨道上，采用星地激光测距、星间微波测距等方式，开展高精度月球轨道测定轨技术验证。
深空探测实验室是由中国国家航天局、安徽省、中国科学技术大学三方共建的新型科技研发机构。深空探测实验室天都通导技术试验星总指挥陈晓介绍，这两颗小微型试验卫星将为后续中国鹊桥通导遥综合星座系统的建立，提供有力的参考和依据。