PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-17:58:10
G01     115.3          20.6               16.1 +/-    1.07      34.8 +/-    1.07  0.030 / 0.040
G07     90.2           64.6               16.4 +/-    0.36      18.0 +/-    0.36  0.030 / 0.040
G08     44.0           29.8               11.6 +/-    0.81      20.4 +/-    0.81  0.050 / 0.100
G09     176.4          21.8               15.1 +/-    1.43      31.8 +/-    1.43  0.050 / 0.110
G11     102.2          41.5               17.0 +/-    0.75      24.1 +/-    0.75  0.040 / 0.060
G13     315.5          22.6               11.2 +/-    1.41      23.2 +/-    1.41  0.040 / 0.070
G17     203.7          26.2               15.3 +/-    2.19      29.1 +/-    2.19  0.040 / 0.070
G18     90.1           22.4               14.0 +/-    1.91      29.1 +/-    1.91  0.040 / 0.090
G28     301.2          59.0               14.8 +/-    0.66      17.0 +/-    0.66  0.030 / 0.040
G30     357.7          72.6               15.6 +/-    1.14      16.3 +/-    1.14  0.040 / 0.040