PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/16-19:58:00
G01     94.9           30.1               13.1 +/-    1.13      22.9 +/-    1.13  0.030 / 0.060
G07     122.4          43.3               13.5 +/-    0.81      18.6 +/-    0.81  0.040 / 0.050
G08     41.8           10.5                9.5 +/-    3.21      26.4 +/-    3.21  0.040 / 0.050
G11     72.3           41.1               12.4 +/-    1.20      17.7 +/-    1.20  0.050 / 0.050
G13     299.0          35.2               11.4 +/-    1.11      18.0 +/-    1.11  0.080 / 0.150
G17     210.4          49.8               14.2 +/-    0.57      18.0 +/-    0.57  0.070 / 0.100
G18     66.1           23.6               10.7 +/-    1.79      21.6 +/-    1.79  0.220 / 0.250
G19     212.1          23.1               13.7 +/-    2.30      28.0 +/-    2.30  0.140 / 0.250
G28     330.6          61.3               11.3 +/-    1.11      12.7 +/-    1.11  0.030 / 0.020
G30     90.5           77.6               12.6 +/-    0.62      12.9 +/-    0.62  0.030 / 0.030