【Paper】 How to enhance orbit determination of formation-flying satellites

Date:[2019-11-22] Clicks:[353]

A new paper have been published on GPS Solutions entitled: Enhanced orbit determination for formation-flying satellites through integrated single- and double-difference GPS ambiguity resolution.


For formation-flying satellites, recent studies have reported that single receiver IAR by resolving the single-difference (SD) ambiguities between GNSS satellites at each individual formation-flying satellite cannot achieve the same relative orbit accuracy that is attained by double-difference (DD) IAR between formation-flying satellites. In this study, we have found that errors in the GPS clock and/or phase bias products may partly explain the degraded relative accuracy of SD-IAR. We therefore propose an integrated IAR scheme for formation flying satellites to enhance the orbit solutions. In the proposed integrated IAR scheme, SD-IAR is performed only at the reference formation-flying satellite, while DD-IAR is further accomplished between formation-flying satellites. To demonstrate the added value of the proposed IAR scheme, GPS data collected by the GRACE mission have been used.  Our results have showed that the integrated IAR-SD-DD scheme is able to provide the best absolute and relative orbit accuracies simultaneously.


For more details, please refer to the paper:
Guo, X., Geng, J., Chen, X. et al. (2020) Enhanced orbit determination for formation-flying satellites through integrated single- and double-difference GPS ambiguity resolution. GPS Solut: 24: 14.



Fig. 1 SLR residuals for GRACE kinematic orbits derived from different AR schemes



Fig. 2 Daily STDs of the KBR residuals for the dynamic (top) and kinematic (bottom) orbits derived from different AR schemes


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