PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/17-00:57:40
G02     219.2          65.4               10.3 +/-    0.73      11.2 +/-    0.73  0.070 / 0.030
G06     50.4           71.2                8.8 +/-    0.36       9.2 +/-    0.36  0.050 / 0.030
G12     319.6          39.1                7.4 +/-    0.72      10.9 +/-    0.72  0.040 / 0.020
G17     57.8           34.0                9.0 +/-    2.13      14.6 +/-    2.13  0.030 / 0.020
G19     42.9           47.4                8.6 +/-    0.69      11.2 +/-    0.69  0.080 / 0.060
G24     260.7          40.6               10.3 +/-    4.26      14.8 +/-    4.26  0.090 / 0.070
G28     125.2          10.4               14.3 +/-    2.24      39.5 +/-    2.24  0.230 / 0.340