PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/07-17:58:00
G01     111.0          22.6               13.8 +/-    1.31      28.5 +/-    1.31  0.050 / 0.070
G07     104.2          55.4               11.8 +/-    0.91      14.0 +/-    0.91  0.040 / 0.070
G08     42.4           24.2                7.7 +/-    1.90      15.2 +/-    1.90  0.040 / 0.090
G09     176.4          19.3               12.9 +/-    2.21      28.9 +/-    2.21  0.040 / 0.080
G11     94.0           42.7               12.8 +/-    0.75      17.8 +/-    0.75  0.030 / 0.040
G13     312.6          26.4               11.0 +/-    1.86      20.8 +/-    1.86  0.030 / 0.050
G17     203.3          33.0               13.9 +/-    1.75      23.0 +/-    1.75  0.090 / 0.240
G18     83.4           23.1                9.9 +/-    0.98      20.2 +/-    0.98  0.090 / 0.220
G28     299.9          57.6               11.7 +/-    0.85      13.6 +/-    0.85  0.080 / 0.220
G30     14.8           76.3               13.5 +/-    0.64      13.9 +/-    0.64  0.080 / 0.210