PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/23-20:42:40
G07     3.3            66.3               14.9 +/-    0.57      16.1 +/-    0.57  0.030 / 0.050
G08     74.7           53.1               15.4 +/-    0.59      18.7 +/-    0.59  0.030 / 0.050
G09     182.0          55.6               16.8 +/-    1.92      19.8 +/-    1.92  0.060 / 0.190
G11     136.2          23.6               21.7 +/-    1.57      43.7 +/-    1.57  0.060 / 0.170
G23     158.5          21.3               19.4 +/-    1.75      41.4 +/-    1.75  0.050 / 0.050
G27     42.3           20.1               12.5 +/-    0.80      27.4 +/-    0.80  0.050 / 0.080
G28     254.0          42.9               15.5 +/-    0.48      21.6 +/-    0.48  0.040 / 0.040
G30     318.7          49.5               12.3 +/-    0.95      15.7 +/-    0.95  0.040 / 0.040