PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/28-20:28:00
G07     9.1            67.3               10.9 +/-    0.73      11.7 +/-    0.73  0.070 / 0.130
G08     70.9           52.4               10.4 +/-    0.61      12.7 +/-    0.61  0.080 / 0.120
G09     181.3          52.8               11.4 +/-    2.04      13.9 +/-    2.04  0.040 / 0.090
G11     134.2          25.4               12.9 +/-    0.99      24.9 +/-    0.99  0.060 / 0.110
G23     158.8          18.7               14.5 +/-    2.99      32.9 +/-    2.99  0.090 / 0.350
G27     41.1           18.2                8.8 +/-    0.53      20.2 +/-    0.53  0.140 / 0.330
G28     256.9          44.5               10.0 +/-    1.03      13.5 +/-    1.03  0.100 / 0.230
G30     320.8          51.2               11.0 +/-    1.42      13.7 +/-    1.42  0.090 / 0.180