PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/17-21:12:40
G01     218.0          11.0               11.1 +/-    5.20      30.3 +/-    5.20  0.040 / 0.040
G03     267.4          70.0               10.4 +/-    0.96      11.0 +/-    0.96  0.040 / 0.030
G09     300.4          17.6                9.2 +/-    2.14      21.4 +/-    2.14  0.130 / 0.220
G14     91.2           22.8                9.4 +/-    2.23      19.3 +/-    2.23  0.100 / 0.250
G16     135.2          52.3               11.3 +/-    0.68      13.8 +/-    0.68  0.050 / 0.070
G22     205.3          63.5               10.1 +/-    0.48      11.1 +/-    0.48  0.040 / 0.060
G23     312.9          42.6                8.9 +/-    0.89      12.4 +/-    0.89  0.040 / 0.040
G26     83.2           54.2                8.9 +/-    0.43      10.7 +/-    0.43  0.040 / 0.030
G31     48.6           26.1                7.1 +/-    2.85      13.5 +/-    2.85  0.050 / 0.080