PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/12-18:43:00
G03     195.9          39.5               11.9 +/-    1.69      17.5 +/-    1.69  0.120 / 0.140
G07     269.8          24.4               11.0 +/-    1.99      21.7 +/-    1.99  0.090 / 0.150
G09     316.8          40.6               10.7 +/-    1.03      15.4 +/-    1.03  0.080 / 0.170
G16     59.6           58.2               12.8 +/-    0.59      14.8 +/-    0.59  0.080 / 0.130
G22     181.8          24.2               10.6 +/-    1.90      21.2 +/-    1.90  0.040 / 0.040
G23     357.7          75.6               11.1 +/-    0.49      11.5 +/-    0.49  0.040 / 0.040
G27     120.9          21.6               11.7 +/-    1.43      24.9 +/-    1.43  0.080 / 0.080