主要的錯誤信息：
- out of range of pole table
- Converting CE to CM using otlcmc.dat offsets for FES2004
sh_sp3fit: Using sestbl. found in /home/zhao/work/longline/yjan/igs
Setting srpprm = allpr for ECOMC
sh_sp3fit: Generating fitted g-file for: igsg 2020 079
sh_sp3fit: gfile and sp3fit files for igsg renamed to igsg for GPS
sestbl. exists--do not craeate a link
STATUS :200408:1836:51.0 NGSTOT/orbits/ngstot: Started NGSTOT ver. 10.15 2020/02/3 17:00:00 UTC (Linux) Library ver. 11.33 of 2020/02/10 14:24 UTC (Linux)
STATUS :200408:1836:51.0 NGSTOT/orbits/ngstot: Reading igs20974.sp3 to write tigs20974.sp3 for GNSS = G
STATUS :200408:1836:51.0 NGSTOT/orbits/ngstot: Converting CE to CM using otlcmc.dat offsets for FES2004
STOP FATAL Error: Stop from report_stat
STATUS :200408:1836:51.0 NGSTOT/orbits/tdtrit: Successfully wrote Earth-fixed T-file 97 epochs written on T-file
STATUS :200408:1836:51.0 NGSTOT/orbits/ngstot: Writing inertial T-file (Name tigs20974.sp3)
STATUS :200408:1836:51.0 NGSTOT/orbits/openb: Opened print file: (Name trot.out)
STATUS :200408:1836:51.0 NGSTOT/orbits/openb: Opened output T-file: (Name tigs20974.sp3)
STATUS :200408:1836:51.0 NGSTOT/orbits/openb: Opened input T-file: (Name tigs2097e.sp3)
STATUS :200408:1836:51.0 NGSTOT/orbits/trot: Input T-file is Earth-fixed, converting to inertial
FATAL :200408:1836:51.0 NGSTOT/lib/polred: JD= 2458928 out of range of pole table, JDT1= 2448622 JDT2= 2458920
sh_sp3fit: Creating initial ARC input file