軌道動力學修正模型及其在北斗短時星歷預測中的應用
發(fā)布時間:2019-01-04 22:06
【摘要】:對于具有低功耗和小型化需求的便攜式衛(wèi)星導航終端設備,準確的星歷預測更有利于其快速定位,實現節(jié)能與器件小型化.在傳統(tǒng)衛(wèi)星軌道動力學模型預測方法的基礎上,提出了含太陽、地球和月球的萬有引力以及太陽光壓之外的其他攝動力修正項的修正模型.利用導航衛(wèi)星軌道位置的周期性特性,在軌道平面下對該修正項進行數值建模,通過北斗導航衛(wèi)星的歷史廣播星歷數據獲得修正項參數的短時擬合值,進而對北斗導航衛(wèi)星進行星歷預測.最后,通過北斗導航衛(wèi)星的實際星歷數據驗證了該修正模型對提高短時星歷預測精度的可行性.
[Abstract]:For portable satellite navigation terminal equipment with low power consumption and miniaturization, accurate ephemeris prediction is more conducive to its rapid positioning, energy saving and device miniaturization. Based on the traditional prediction method of satellite orbit dynamics model, a modified model is proposed which includes the gravity of the sun, the earth and the moon, as well as other perturbation correction terms other than the solar pressure. Based on the periodic characteristic of navigation satellite's orbit position, the correction term is modeled numerically under the orbit plane, and the short time fitting value of the correction term parameter is obtained by using the historical broadcast ephemeris data of Beidou navigation satellite. Then the ephemeris prediction of Beidou navigation satellite is carried out. Finally, the feasibility of the modified model to improve the prediction accuracy of short-time ephemeris is verified by the actual ephemeris data of Beidou navigation satellite.
【作者單位】: 廈門大學信息科學與技術學院;
【基金】:中國第二代衛(wèi)星導航系統(tǒng)重大專項(GFZX031010708)
【分類號】:P228.4
[Abstract]:For portable satellite navigation terminal equipment with low power consumption and miniaturization, accurate ephemeris prediction is more conducive to its rapid positioning, energy saving and device miniaturization. Based on the traditional prediction method of satellite orbit dynamics model, a modified model is proposed which includes the gravity of the sun, the earth and the moon, as well as other perturbation correction terms other than the solar pressure. Based on the periodic characteristic of navigation satellite's orbit position, the correction term is modeled numerically under the orbit plane, and the short time fitting value of the correction term parameter is obtained by using the historical broadcast ephemeris data of Beidou navigation satellite. Then the ephemeris prediction of Beidou navigation satellite is carried out. Finally, the feasibility of the modified model to improve the prediction accuracy of short-time ephemeris is verified by the actual ephemeris data of Beidou navigation satellite.
【作者單位】: 廈門大學信息科學與技術學院;
【基金】:中國第二代衛(wèi)星導航系統(tǒng)重大專項(GFZX031010708)
【分類號】:P228.4
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