Constellation ephemeris on-orbit updating method

• Main Authors: HU HAIYING, PEI WENLIANG, BAO HAICHAO, ZHANG SHENGYU, FENG JIAPENG, SUN JIE
• Format: Patent
• Language: Chinese; English
• Published: 18.06.2021
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

The invention discloses a constellation ephemeris on-orbit updating method, which comprises the following steps: firstly, judging whether a satellite is a satellite newly added into a network, if so, updating extrapolation multipoint ephemeris data within the time of T0 to T0 + 2T, and after GNSS positioning is normal, updating real-time broadcast two-point ephemeris at the time of T0 and T0 + T, where T0 is the current time and T is ephemeris extrapolation time demand; then, using a sliding updating method, and updating the ephemeris data of the two real-time broadcast points at the T0 moment and the T0 + T moment at the same time per second; and updating the extrapolated multipoint ephemeris data in the subsequent 2T moment for standby application every specified time interval. 本发明公开一种星座星历在轨更新方法，首先，判断卫星是否为新加入网络的卫星，若是，则更新T0～T0+2T时间内的外推多点星历数据，并在GNSS定位正常后，更新T0、T0+T时刻的实时广播两点星历，其中，T0为当前时刻，T为星历外推时间需求；然后，采用滑动更新方法，每秒同时更新T0、T0+T时刻的实时广播两点星历数据；以及每隔指定时间间隔，更新后续2T时刻内的外推多点星历数据作为备用。