PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-03:27:50
G01     68.9           32.7                2.5 +/-    1.41       4.2 +/-    1.41  0.030 / 0.040
G07     138.3          29.6                5.6 +/-    1.05      10.0 +/-    1.05  0.030 / 0.040
G11     53.8           30.9                2.8 +/-    1.39       4.8 +/-    1.39  0.060 / 0.090
G13     273.6          36.9                2.8 +/-    2.49       4.3 +/-    2.49  0.060 / 0.080
G15     300.4          16.1                0.3 +/-    1.39       0.8 +/-    1.39  0.120 / 0.230
G17     236.6          70.0                4.0 +/-    0.55       4.3 +/-    0.55  0.110 / 0.250
G19     225.6          44.3                4.1 +/-    2.35       5.5 +/-    2.35  0.030 / 0.030
G28     23.7           58.6                2.3 +/-    2.86       2.6 +/-    2.86  0.030 / 0.030
G30     136.6          56.6                5.6 +/-    0.33       6.6 +/-    0.33  0.050 / 0.070