Application: Differential GPS (DGPS) enhances standard GPS accuracy by correcting signal errors using a fixed reference station. Applications include precision agriculture, surveying, marine navigation, autonomous vehicles, and disaster management. It improves positioning accuracy for mapping, construction, and environmental monitoring. Spectations: Model: SL900 GNSS Receiver Real time kinematic: H: 8mm + 1ppm RMS / V: 15mm + 1ppm RMS High-precision Static: H: 2.5mm + 0.1ppm RMS / V: 3.5mm + 0.4ppm RMS