PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/12-23:58:00
G01     74.2           33.2                7.8 +/-    1.13      12.7 +/-    1.13  0.030 / 0.040
G07     135.7          34.0               12.4 +/-    0.95      20.0 +/-    0.95  0.030 / 0.030
G11     57.8           34.8                8.0 +/-    1.13      12.7 +/-    1.13  0.060 / 0.090
G13     278.9          37.5                8.8 +/-    1.22      13.4 +/-    1.22  0.210 / 0.290
G15     304.5          15.0                5.9 +/-    1.45      14.7 +/-    1.45  0.050 / 0.030
G17     228.3          63.6               10.8 +/-    0.96      11.9 +/-    0.96  0.080 / 0.040
G19     222.2          39.3               11.1 +/-    1.71      16.3 +/-    1.71  0.050 / 0.110
G28     15.6           59.7                7.9 +/-    0.80       9.0 +/-    0.80  0.050 / 0.090
G30     132.2          61.1               11.1 +/-    0.42      12.5 +/-    0.42  0.040 / 0.080