PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-00:28:30
G07     325.0          55.3                4.0 +/-    0.88       4.8 +/-    0.88  0.030 / 0.050
G08     108.1          48.5                7.5 +/-    1.37       9.6 +/-    1.37  0.040 / 0.070
G09     205.5          80.9                6.9 +/-    0.99       6.9 +/-    0.99  0.120 / 0.210
G16     44.3           15.1                3.0 +/-    1.95       7.5 +/-    1.95  0.080 / 0.210
G23     153.1          52.9                6.4 +/-    0.51       7.7 +/-    0.51  0.130 / 0.480
G27     66.9           36.9                4.2 +/-    0.69       6.4 +/-    0.69  0.120 / 0.440
G28     230.7          20.5                6.9 +/-    1.72      14.9 +/-    1.72  0.040 / 0.060
G30     294.8          28.7                2.7 +/-    1.46       4.9 +/-    1.46  0.040 / 0.070