PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/19-02:27:50
G02     200.6          25.2                5.9 +/-    2.22      11.4 +/-    2.22  0.070 / 0.090
G06     175.1          54.0                6.6 +/-    1.10       8.0 +/-    1.10  0.080 / 0.110
G13     223.7          10.7                5.5 +/-    2.93      15.1 +/-    2.93  0.030 / 0.030
G17     28.8           54.9                3.9 +/-    1.04       4.7 +/-    1.04  0.030 / 0.030
G19     332.5          70.2                3.3 +/-    0.62       3.5 +/-    0.62  0.050 / 0.070
G24     305.3          34.4                2.4 +/-    2.27       3.9 +/-    2.27  0.050 / 0.070
G28     90.0           40.1                3.7 +/-    0.94       5.4 +/-    0.94  0.030 / 0.040
G30     157.6          11.2                5.9 +/-    7.77      16.1 +/-    7.77  0.040 / 0.040