PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/04-13:57:40
G03     238.1          69.0                8.3 +/-    0.59       8.8 +/-    0.59  0.090 / 0.200
G09     302.2          16.5                5.9 +/-    2.79      14.1 +/-    2.79  0.090 / 0.240
G14     96.9           19.2                7.5 +/-    1.07      16.9 +/-    1.07  0.040 / 0.070
G16     126.9          58.1                9.0 +/-    0.41      10.4 +/-    0.41  0.040 / 0.080
G22     189.5          53.8                8.7 +/-    1.75      10.4 +/-    1.75  0.060 / 0.060
G23     322.3          52.3               10.1 +/-    1.11      12.4 +/-    1.11  0.050 / 0.050
G26     69.7           51.1                7.5 +/-    0.38       9.3 +/-    0.38  0.050 / 0.060
G31     51.9           19.1                6.3 +/-    0.71      14.2 +/-    0.71  0.050 / 0.050