PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/30-14:28:00
G02     283.0          79.6                5.5 +/-    1.00       5.5 +/-    1.00  0.080 / 0.190
G05     170.2          24.3                8.2 +/-    2.05      16.4 +/-    2.05  0.080 / 0.180
G06     40.3           46.1                4.3 +/-    0.78       5.7 +/-    0.78  0.020 / 0.040
G12     318.8          66.7                3.2 +/-    1.03       3.5 +/-    1.03  0.030 / 0.030
G17     81.1           13.9                7.0 +/-    1.69      17.7 +/-    1.69  0.090 / 0.150
G19     65.6           35.1                5.8 +/-    0.85       9.2 +/-    0.85  0.110 / 0.170
G24     231.1          26.9                8.2 +/-    1.03      15.3 +/-    1.03  0.060 / 0.140
G25     317.5          25.0                5.3 +/-    2.19      10.4 +/-    2.19  0.070 / 0.140