Table 1 Characteristics of OCEL sessions and problems encountered during the analysis, shown for the selected experiments
From: Position determination of the Chang’e 3 lander with geodetic VLBI
Session | Quasar data | Lunar data |
|---|---|---|
RD1405 (OCEL01) | Stations used (8): Bd, Hh, Ho, Ny, On, Sh, Wz, Zc | (6): Bd, Ny, Ho, On, Wz, Zc |
No. of usable/scheduled obs.: 2622/6585 | 301 /1018 | |
Mc scheduled, but not participated | Most obs. during the last 6 h | |
Ny participating during the first 10 h | ||
RD1506 (OCEL06) | Stations used (11): Bd, Ft, Hh, Ho, Kk, Mt, Ny, On, Sh, Wz, Zc | (8): Bd, Ft, Hh, Ho, Kk, Mt, Sh, Wz |
No. of usable/scheduled obs.: 5064/6912 | 520/870 | |
Manual phase calibration applied to all stations | 19-h observation period | |
RFI at S band (Ft, Ho, Mt, Sh, Zc) | ||
Problems at X band (Ho, Ny, Sh) | ||
RD1510 (OCEL08) | Stations used (10): Bd, Ft, Ho, Ht, Kk, Mt, Ny, On, Wz, Zc | (9): No On |
No. of usable/scheduled obs.: 3523/6045 | 856/1524 | |
Manual phase calibration (Kk) | 22-h obs. period | |
RFI at S band (Ft, Mt, Zc) | ||
Problems at X band (Ft, Ny) | ||
RD1601 (OCEL09) | Stations used (10): Bd, Ft, Ho, Hh, Kk, Mt, Ny, On, Wz, Zc | All |
No. of usable/scheduled obs.: 3791/6094 | 1302/1427 | |
Manual phase calibration (Ho, Kk) | 24-h obs. period | |
RFI at S band (Ft, Ho, Mt, Zc) | ||
Problems at X band (Ny) | ||
RD1604 (OCEL10) | Stations used (10): Bd, Ft, Hh, Ho, Mc, Ny, On, Sh, Wz, Zc | (7): Bd, Ft, Hh, Wz, On, Sh, Zc |
No. of usable/scheduled obs.: 2617/7272 | 547/1629 | |
Manual phase calibration (Ho, Mc) | Most obs. during the first 8 h | |
RFI at S band (Zc, Ft, Mc) | ||
Poor data quality at Mc: not used | Poor data quality at Mc: not used | |
RD1613 (OCEL12) | Stations used (9): Bd, Hh, Kk, Mt, Ny, On, Ft, Wz, Zc | (8): No Ft |
No. of usable/scheduled obs.: 3022/5339 | 345/1355 | |
No signal in the last four X-band channels at Ft, Mt and Ny | 16-h obs. period | |
RFI at S band (Ft, Mt, Zc) | ||
Manual phase calibration (Kk) | ||
Ho and Ur - not correlated |