Forecast Errors (IMAGE) Science China Press Caption This image shows the ratio of track forecast errors of assimilating ALL available data and dropwindsonde data according to CNOP, FSV, and Random (Ran) guidance, to assimilating no data at (a) 24 h and (b) 36 h using MM5 for 20 cases. Positive (negative) percentages indicate improvement (deterioration). 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.