PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/15-23:57:50
G02     202.5          35.4               15.0 +/-    0.96      23.6 +/-    0.96  0.400 / 0.200
G06     160.5          68.6               12.1 +/-    0.45      12.9 +/-    0.45  0.270 / 0.210
G12     307.2          14.5                8.2 +/-    2.20      20.6 +/-    2.20  0.180 / 0.080
G17     30.6           53.4               10.9 +/-    0.70      13.3 +/-    0.70  0.090 / 0.060
G19     358.2          65.9                9.8 +/-    0.49      10.7 +/-    0.49  0.080 / 0.030
G24     298.8          37.7               10.9 +/-    2.57      16.6 +/-    2.57  0.060 / 0.020
G28     102.2          31.2               11.1 +/-    1.20      19.0 +/-    1.20  0.200 / 0.150