PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-18:42:40
G01     123.9          13.5               15.3 +/-   33.24      39.6 +/-   33.24  0.040 / 0.040
G07     75.8           64.7               19.0 +/-   39.50      20.7 +/-   39.50  0.030 / 0.050
G08     47.9           36.2                7.1 +/-    2.66      11.1 +/-    2.66  0.030 / 0.040
G09     178.5          33.9                6.6 +/-   20.21      10.7 +/-   20.21  0.020 / 0.050
G11     113.1          37.7               16.6 +/-   38.43      25.0 +/-   38.43  0.060 / 0.080
G13     319.9          15.1               10.9 +/-   37.86      27.0 +/-   37.86  0.080 / 0.070
G17     199.7          18.6               16.9 +/-   39.77      38.4 +/-   39.77  0.130 / 0.370
G18     98.3           18.1               13.7 +/-   35.53      31.7 +/-   35.53  0.140 / 0.390
G28     276.1          51.3               17.1 +/-   37.18      21.2 +/-   37.18  0.110 / 0.270
G30     339.3          64.6               16.6 +/-   37.40      18.2 +/-   37.40  0.090 / 0.290