PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-20:27:50
G01     56.0           28.9               13.1 +/-    2.01      23.5 +/-    2.01  0.230 / 0.330
G07     144.0          19.0               20.1 +/-    2.20      45.3 +/-    2.20  0.150 / 0.330
G11     47.0           21.4               12.1 +/-    2.39      25.8 +/-    2.39  0.040 / 0.060
G13     258.0          33.6               20.6 +/-    1.17      33.6 +/-    1.17  0.060 / 0.050
G15     290.4          16.2               15.2 +/-    1.33      36.6 +/-    1.33  0.100 / 0.230
G17     266.6          75.6               19.3 +/-    0.61      19.9 +/-    0.61  0.110 / 0.210
G18     40.2           10.6               11.8 +/-    1.77      32.4 +/-    1.77  0.110 / 0.530
G19     237.0          53.0               20.9 +/-    2.08      25.5 +/-    2.08  0.100 / 0.540
G28     42.8           55.2               16.6 +/-    0.67      19.8 +/-    0.67  0.060 / 0.090
G30     146.1          47.1               19.4 +/-    0.87      25.4 +/-    0.87  0.130 / 0.090