The basis of the CORS system is thecontinuous operation reference stations (CORS) receiver, which is required to operate 24 hours x 7 days x 365 days stably and reliably without interruption. According to the operation requirements of the existing CORS system, it needs several years of continuous, stable and reliable operation. The core component of the CORS receiver, GNSS OEM board, must meet and exceed the performance requirements of the CORS receiver in order to ensure continuous, stable and reliable operation of the CORS receiver for a long time.

In response to the needs of the surveying and mapping sectors, Unicorecomm has designed and produced high-end GNSS OEM board - UB4B0 to meet the application needs of CORS receiver, and high-end GNSS OEM board - UB4B0M to meet the application needs of surveying and mapping. These two products have been widely used in China, fully verifying their accuracy, stability and reliability.

Huatest, as a well-known GNSS manufacturer in China,has mass-produced different types of surveying and mapping receivers, and CORS receivers using high-end GNSS OEM boards of Unicorecomm.