Frequency data processing of RAMP Doppler for precision orbit determination of the Mars spacecraft
Abstract
<p indent="0mm">In response to the tracking and control needs of Chinese future deep space exploration missions, this work provides a detailed study on the processing of RAMP Doppler frequency data in radio tracking. A data processing software for precise orbit determination of Mars spacecraft was developed. The RAMP Doppler frequency data from the MRO spacecraft in January 2007 were carefully processed, successfully achieving precise orbit determination. The results show that the post-fit residual RMS ranges from 0.74 to <sc>1.19 mm/s,</sc> with an average of approximately <sc>0.81 mm/s.</sc> The reconstructed orbit achieves position accuracy at the meter level and velocity accuracy at the millimeter level, comparable to the precision of the JPL-published orbit. Additionally, the effects of atmospheric drag and solar radiation pressure values on the orbit accuracy of the MRO spacecraft were further explored. This research provides technical support for the radio tracking data processing of Chinese future deep space exploration missions. </p>
