PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/13-04:28:10
G02     226.5          70.0                3.6 +/-    0.47       3.8 +/-    0.47  0.040 / 0.040
G06     44.9           71.3                1.4 +/-    0.62       1.5 +/-    0.62  0.040 / 0.050
G12     320.0          42.3                2.4 +/-    0.72       3.4 +/-    0.72  0.210 / 0.410
G17     65.7           24.8                3.4 +/-    2.04       6.7 +/-    2.04  0.330 / 0.450
G19     48.2           44.0                3.5 +/-    0.86       4.8 +/-    0.86  0.050 / 0.090
G24     250.1          38.5                4.8 +/-    2.03       7.1 +/-    2.03  0.060 / 0.060
G28     127.4          9.6                 3.9 +/-    3.00      11.1 +/-    3.00  0.050 / 0.040