PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-00:28:00
G01     108.1          25.0                8.6 +/-    0.85      16.8 +/-    0.85  0.060 / 0.150
G07     104.9          59.3               10.8 +/-    0.36      12.4 +/-    0.36  0.060 / 0.140
G08     42.4           23.3                6.4 +/-    1.18      13.1 +/-    1.18  0.060 / 0.050
G09     175.8          15.5               12.5 +/-    2.35      30.8 +/-    2.35  0.040 / 0.060
G11     94.2           43.3               10.1 +/-    0.87      13.9 +/-    0.87  0.060 / 0.080
G13     311.0          27.3                6.3 +/-    1.55      11.7 +/-    1.55  0.080 / 0.080
G17     206.0          35.3               10.9 +/-    1.61      17.1 +/-    1.61  0.080 / 0.110
G19     208.8          12.3                9.2 +/-    5.18      24.3 +/-    5.18  0.090 / 0.130
G28     317.2          61.0                9.0 +/-    1.03      10.1 +/-    1.03  0.040 / 0.050
G30     41.5           77.7               10.5 +/-    0.47      10.7 +/-    0.47  0.030 / 0.040