PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-17:58:00
G02     206.9          41.9               13.2 +/-    0.96      18.7 +/-    0.96  0.040 / 0.080
G06     128.4          77.3               11.0 +/-    1.07      11.2 +/-    1.07  0.060 / 0.090
G12     313.0          25.1               11.2 +/-    2.11      21.9 +/-    2.11  0.060 / 0.090
G17     43.7           43.1               10.5 +/-    0.96      14.6 +/-    0.96  0.070 / 0.080
G19     11.9           61.6               11.4 +/-    0.41      12.8 +/-    0.41  0.080 / 0.130
G24     286.2          42.0               10.8 +/-    2.22      15.3 +/-    2.22  0.090 / 0.140
G28     110.3          25.4               11.6 +/-    1.26      22.5 +/-    1.26  0.040 / 0.040