PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-23:42:40
G02     202.8          35.9               15.8 +/-    0.98      24.7 +/-    0.98  0.100 / 0.240
G06     159.3          69.3               13.6 +/-    0.78      14.5 +/-    0.78  0.240 / 0.390
G12     307.6          15.1                8.2 +/-    2.36      20.4 +/-    2.36  0.080 / 0.150
G17     31.0           53.2                9.9 +/-    0.98      12.0 +/-    0.98  0.080 / 0.150
G19     359.3          65.6               10.4 +/-    0.64      11.3 +/-    0.64  0.070 / 0.100
G24     298.1          38.0               13.0 +/-    1.30      19.6 +/-    1.30  0.070 / 0.080
G28     102.8          30.8               14.0 +/-    0.44      24.1 +/-    0.44  0.060 / 0.090