The East African cross-border trunk road reconstruction and expansion project, with a total length of 42km, mainly carries out strip terrain collection along the line, river section measurement, slope settlement monitoring, and terrain data collection around the culvert.

Savanna and river valley are crisscrossed along the cross-border highway, and there is no 4G network in the middle mountain area; The tropical rainy season lasts for 6 months, with muddy laterite everywhere; There is no stable mains supply for field construction; Chinese engineers and local workers in Swahili work together, and the long-term section transfer is frequent.

Tk300 base stations are erected in sections every 5km along the road, with detachable dual battery hot plug, and continuous operation throughout the day without generator power supply; The built-in radio station of the base station covers the 5-8km road section. The non signal area in the mountain area can output differential signals stably. At the same time, it can be used as a reference station to cooperate with Dajiang UAV to aerial photograph the whole line of strip terrain.

Three tk300 mobile stations collect the data of terrain breaking points and river section along the line in groups synchronously. The 60 ° inclination measurement can collect the points at the bottom of the river valley in the roadside safety area; The equipment is broadcast in English and Swahili, and both Chinese and foreign teams can quickly identify the equipment status.

Tk300 has a unique 7-pin expansion interface. The construction river reach can be connected with an external depth sounder to synchronously collect underwater depth data of the river channel, and the land terrain + underwater hydrology can be integrated; Enrich the radio protocol to be compatible with the original third-party surveying and mapping equipment of the project.