The paper is intended to describe relationships of reflected GPS signals and environmental effect factors. An altitude iteration loop into least-squares searching for receiver position was modified and enhanced by giving 4 or more pseudoranges and ephemeredes and zooming on the plot to detect the search partern 1. The software is developed using Matlab tools, which can display results of the reflected surface area altitude in real time. For the reflected signal application, it has been proven that a GPS receiver cannot smoothly detect reflected signals because under the underground base receiver system cannot smoothly receive the reflected signals which are weak and discontinuously reflected. This problem negatively impacts and reduces application of reflected signals. At mean LHCP/RHCP receiver positions with solution of instantaneous ambiguity by condition, the values of moving position relative of mean receiver position by altitude, north and east with Is latency are among -0.5 m and 0.5 m with L1/L2 SNR and atmospheric delays. The Design of an integrated receiver system permits smooth reception of the signals reflected by the water or ground. A rapid resolution altimetry and stream flow method was developed by using surface elevations spectrum with the elevation angle and line of sight theory in the reflecting geometry and atmospheric corrections with ambiguity solution. A estimation of stream flow formula method was developed by using 10 Hz Ll/L2 observations of LHCP/RHCP Receiver and Instantaneous Troposphere delay derived method.