Table 1 Comparison table between the simulation result of least square fit of inter-satellite measured clock offset and supposed inter-satellite clock offset (supposed inter-satellite clock offset is 1 μs)
Inter-satellite clock offset measurement period | 10:54:20.00–11:02:20.00 (IGSO-MEO, 4 May 2013, 8 min) | 22:34:22.00–22:42:22.00 (IGSO-MEO, 7 May 2013, 8 min) | 09:12:19.00–09:22:19.00 (GEO-MEO,4 May 2013, 10 min) | 09:10:19.00–09:20:19.00 (GEO-MEO,4 May 2013, 10 min, asymmetric) |
|---|---|---|---|---|
Clock offset fit polynomial | Δt = − 0.372176501946 t + 1089.444989769498 | Δt = − 0.364959943846 t + 1087.954045728843 | Δt = − 1.555465415566 t + 1467.152871236339 | Δt = − 1.306432475243 t + 1517.084268939684 |
Moment with the inter-satellite distance change rate of 0 | 10:58:19.5574374629894 | 22:38:22.1876282510187 | 09:17:18.3207178132001 | 09:17:18.3207178132001 |
Correction clock offset Δt min(ns) | 1000.287340679374 | 1000.295182409809 | 1001.569846515461 | 969.3474842457985 |
Supposed inter-satellite clock offset (ns) | 1000 | 1000 | 1000 | 1000 |
Deviation between the correction clock offset and supposed clock offset (ns) | 0.287340679374 | 0.295182409809 | 1.569846515461 | − 30.652515754201545 |