PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-04:42:50
G02     215.2          62.3                5.3 +/-    0.98       6.0 +/-    0.98  0.190 / 0.370
G06     61.8           76.9                3.0 +/-    0.56       3.1 +/-    0.56  0.180 / 0.370
G12     318.2          34.6                2.0 +/-    1.38       3.1 +/-    1.38  0.060 / 0.070
G17     56.6           33.7                3.3 +/-    2.84       5.3 +/-    2.84  0.040 / 0.120
G19     39.8           48.9                2.5 +/-    1.68       3.2 +/-    1.68  0.040 / 0.020
G24     266.6          41.5                4.1 +/-    1.75       5.9 +/-    1.75  0.040 / 0.030
G28     122.9          13.1                5.0 +/-    1.76      13.1 +/-    1.76  0.090 / 0.080