PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-17:57:30
G02     206.9          41.9               12.1 +/-    1.15      17.1 +/-    1.15  0.070 / 0.050
G06     128.4          77.3               10.5 +/-    0.61      10.7 +/-    0.61  0.060 / 0.060
G12     313.0          25.1                8.3 +/-    1.55      16.1 +/-    1.55  0.020 / 0.020
G17     43.7           43.1               10.2 +/-    2.00      14.2 +/-    2.00  0.030 / 0.030
G19     11.9           61.6               10.7 +/-    0.98      12.0 +/-    0.98  0.140 / 0.120
G24     286.2          42.0               11.7 +/-    2.59      16.4 +/-    2.59  0.180 / 0.140
G28     110.3          25.4                9.8 +/-    1.03      18.9 +/-    1.03  0.040 / 0.040