PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/23-20:12:30
G07     337.3          59.5               14.2 +/-    0.63      16.2 +/-    0.63  0.030 / 0.060
G08     99.7           53.7               16.6 +/-    1.43      20.1 +/-    1.43  0.030 / 0.050
G09     189.9          70.8               15.5 +/-    0.68      16.3 +/-    0.68  0.060 / 0.100
G11     145.7          14.5               26.0 +/-    2.27      65.4 +/-    2.27  0.060 / 0.110
G23     155.6          35.2               17.4 +/-    0.72      27.6 +/-    0.72  0.030 / 0.040
G27     51.5           29.3               13.0 +/-    1.05      23.1 +/-    1.05  0.030 / 0.040
G28     240.4          32.7               16.8 +/-    1.91      27.8 +/-    1.91  0.030 / 0.050
G30     306.5          39.7               12.2 +/-    0.76      17.8 +/-    0.76  0.030 / 0.060