PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/23-20:28:00
G07     349.1          63.1               14.3 +/-    0.66      15.9 +/-    0.66  0.210 / 0.110
G08     86.9           54.3               15.3 +/-    1.06      18.4 +/-    1.06  0.050 / 0.180
G09     184.6          63.3               15.4 +/-    0.86      17.0 +/-    0.86  0.050 / 0.130
G11     141.1          19.0               22.4 +/-    1.24      50.4 +/-    1.24  0.060 / 0.120
G23     157.3          28.2               19.5 +/-    1.73      35.6 +/-    1.73  0.050 / 0.030
G27     46.3           25.0               12.8 +/-    1.85      24.9 +/-    1.85  0.040 / 0.030
G28     246.8          38.0               15.9 +/-    1.49      23.9 +/-    1.49  0.090 / 0.100
G30     312.5          44.5               12.7 +/-    0.69      17.3 +/-    0.69  0.080 / 0.110