PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/17-20:12:50
G01     114.1          21.5               14.6 +/-    1.82      30.9 +/-    1.82  0.070 / 0.070
G07     93.1           63.8               15.4 +/-    0.64      16.9 +/-    0.64  0.110 / 0.090
G08     44.0           30.3               11.5 +/-    0.94      20.1 +/-    0.94  0.130 / 0.100
G09     176.6          21.0               16.2 +/-    2.42      34.7 +/-    2.42  0.130 / 0.670
G11     101.5          41.9               15.0 +/-    1.15      21.2 +/-    1.15  0.100 / 0.150
G13     314.9          23.4               12.7 +/-    1.09      25.7 +/-    1.09  0.130 / 0.170
G17     204.7          26.0               17.5 +/-    2.54      33.5 +/-    2.54  0.050 / 0.020
G18     88.8           22.8               11.8 +/-    1.28      24.3 +/-    1.28  0.050 / 0.010
G28     304.3          59.5               14.2 +/-    0.99      16.2 +/-    0.99  0.030 / 0.010
G30     5.2            74.2               16.1 +/-    0.77      16.7 +/-    0.77  0.030 / 0.010