PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-21:58:00
G07     305.5          45.5               10.7 +/-    1.82      14.3 +/-    1.82  0.130 / 0.550
G08     131.4          39.5               11.6 +/-    0.57      17.0 +/-    0.57  0.210 / 0.430
G09     307.3          76.5                9.8 +/-    0.79      10.0 +/-    0.79  0.140 / 0.220
G16     41.8           26.1                7.7 +/-    3.18      14.7 +/-    3.18  0.160 / 0.190
G23     142.8          63.5               10.3 +/-    0.57      11.4 +/-    0.57  0.050 / 0.070
G27     79.5           36.9                9.7 +/-    1.00      14.8 +/-    1.00  0.050 / 0.070
G28     223.7          12.3                7.8 +/-   16.19      20.7 +/-   16.19  0.040 / 0.060
G30     286.9          25.1                8.8 +/-    1.40      17.2 +/-    1.40  0.040 / 0.060