PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/30-21:28:00
G02     12.0           69.7                8.7 +/-    0.30       9.2 +/-    0.30  0.020 / 0.020
G05     157.1          46.3               10.9 +/-    0.49      14.4 +/-    0.49  0.030 / 0.020
G06     46.2           27.9                7.3 +/-    2.13      13.4 +/-    2.13  0.030 / 0.050
G12     248.4          80.8                9.2 +/-    0.42       9.3 +/-    0.42  0.040 / 0.040
G19     85.0           22.0                8.8 +/-    1.87      18.6 +/-    1.87  0.180 / 0.290
G24     218.6          13.8               11.9 +/-    2.50      30.5 +/-    2.50  0.140 / 0.310
G25     313.1          40.1                8.7 +/-    1.09      12.6 +/-    1.09  0.160 / 0.270
G29     294.8          15.3                8.8 +/-    1.98      21.7 +/-    1.98  0.090 / 0.290