PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-20:57:40
G01     43.8           19.9               11.8 +/-    2.55      26.0 +/-    2.55  0.070 / 0.140
G06     175.4          34.8               12.5 +/-    1.26      19.9 +/-    1.26  0.080 / 0.180
G13     242.0          25.1               14.6 +/-    1.86      28.4 +/-    1.86  0.070 / 0.090
G15     275.7          13.7                9.7 +/-    1.50      25.0 +/-    1.50  0.070 / 0.090
G17     336.9          75.1               11.7 +/-    0.34      12.1 +/-    0.34  0.180 / 0.330
G19     262.8          65.2               12.7 +/-    0.71      13.8 +/-    0.71  0.270 / 0.210
G24     317.8          15.6                9.1 +/-    2.42      22.2 +/-    2.42  0.040 / 0.060
G28     65.6           48.9               12.1 +/-    1.51      15.5 +/-    1.51  0.040 / 0.060
G30     152.9          31.4               14.3 +/-    0.81      24.4 +/-    0.81  0.090 / 0.090