Abstract: In order to compare the differences of ROTI derived from GPS civilian L2C and legacy L2P(Y) signals, 1 s and 30 s sampling interval GPS carrier phase data is collected by four IGS stations installed at low-latitude regions. Firstly, ROTI_L2C (calculated by L1C/A and L2C) and ROTI_L2P (calculated by L1C/A and L2P(Y)) derived from the same receiver are compared. Then ROTI_L2C (and ROTI_L2P) derived from different types of receivers deployed at zero/short baselines are compared. The results show that the significant inconsistencies exist between ROTI_L2C and ROTI_L2P derived from 1 s sampling interval data collected by some receivers. A large discrepancy of ROTI_L2C (and ROTI_L2P) derived from 1 s sampling interval data is also found from the cross-comparison between different types of receivers deployed at zero/short baselines. However, the consistencies exist between ROTI_L2C and ROTI_L2P derived from 30 s sampling interval data collected by the same receiver. Consistencies of ROTI_L2C (and ROTI_L2P) derived from 30 s sampling interval data are also found from the cross-comparison between different types of receivers deployed at zero/short baselines.