Co-Located Receivers (IMAGE) Science China Press Caption This shows co-located receivers PPP time series in different areas. Red, green and blue points represent errors for the East (E), North (N) and Height (U) components. The base-line for the three co-located receivers in a row is less than 10 m. Three rows present the PPP time series for the north, south and west of the regional service area. Credit ©Science China Press Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.