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LIN Gaoyu, WANG Lei, HE Feiyang, SONG Xiaodi, GUO Jiming. GPS receiver differential code bias estimation with the Swarm LEO constellation[J]. Geomatics and Information Science of Wuhan University. doi: 10.13203/j.whugis20200479
Citation: LIN Gaoyu, WANG Lei, HE Feiyang, SONG Xiaodi, GUO Jiming. GPS receiver differential code bias estimation with the Swarm LEO constellation[J]. Geomatics and Information Science of Wuhan University. doi: 10.13203/j.whugis20200479

GPS receiver differential code bias estimation with the Swarm LEO constellation

doi: 10.13203/j.whugis20200479
Funds:

Natural Science Foundation of China (41704002, 42074036) the Fundamental Research Funds for the Central Universities

  • Received Date: 2021-06-30
  • The differential code biases have a great influence on the estimation of ionosphere with GPS observations, which should be precisely calibrated when obtaining ionospheric slant total electron content (STEC). So far, the estimation of GPS satellite DCB is mainly based on the ground-based GPS observation data. With the increasing number of low-orbit satellites, DCB estimation of LEO receivers becomes particularly important for the topside ionosphere research. In this study, onboard observations of GPS satellites by the Swarm constellation are applied to estimate GPS DCBs and receiver DCBs. Since there are three satellites in the constellation, two different estimation schemes are designed, individually estimation and combined estimation respectively. Compared with the individual estimation strategy, The combined estimation strategy achieves more stable satellite DCB with a stability improv ement of 16.6% for GPS satellites, and it's satellite DCB presents better consistency with the reference DCB provi ded by the two analysis centers.
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GPS receiver differential code bias estimation with the Swarm LEO constellation

doi: 10.13203/j.whugis20200479
Funds:

Natural Science Foundation of China (41704002, 42074036) the Fundamental Research Funds for the Central Universities

Abstract: The differential code biases have a great influence on the estimation of ionosphere with GPS observations, which should be precisely calibrated when obtaining ionospheric slant total electron content (STEC). So far, the estimation of GPS satellite DCB is mainly based on the ground-based GPS observation data. With the increasing number of low-orbit satellites, DCB estimation of LEO receivers becomes particularly important for the topside ionosphere research. In this study, onboard observations of GPS satellites by the Swarm constellation are applied to estimate GPS DCBs and receiver DCBs. Since there are three satellites in the constellation, two different estimation schemes are designed, individually estimation and combined estimation respectively. Compared with the individual estimation strategy, The combined estimation strategy achieves more stable satellite DCB with a stability improv ement of 16.6% for GPS satellites, and it's satellite DCB presents better consistency with the reference DCB provi ded by the two analysis centers.

LIN Gaoyu, WANG Lei, HE Feiyang, SONG Xiaodi, GUO Jiming. GPS receiver differential code bias estimation with the Swarm LEO constellation[J]. Geomatics and Information Science of Wuhan University. doi: 10.13203/j.whugis20200479
Citation: LIN Gaoyu, WANG Lei, HE Feiyang, SONG Xiaodi, GUO Jiming. GPS receiver differential code bias estimation with the Swarm LEO constellation[J]. Geomatics and Information Science of Wuhan University. doi: 10.13203/j.whugis20200479
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