PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/04-12:28:00
G01     314.1          26.5                3.3 +/-    1.64       6.2 +/-    1.64  0.040 / 0.050
G10     95.0           46.9                4.1 +/-    0.36       5.4 +/-    0.36  0.040 / 0.050
G11     294.5          25.7                5.7 +/-    1.78      10.9 +/-    1.78  0.130 / 0.320
G14     322.0          70.0                4.0 +/-    0.58       4.3 +/-    0.58  0.130 / 0.300
G18     293.1          46.1                5.2 +/-    1.17       6.8 +/-    1.17  0.030 / 0.050
G22     306.8          22.1                2.9 +/-    1.61       6.1 +/-    1.61  0.030 / 0.050
G25     92.3           13.3                3.9 +/-    1.84      10.0 +/-    1.84  0.090 / 0.210
G31     170.5          55.8                8.9 +/-    1.01      10.5 +/-    1.01  0.080 / 0.190
G32     26.9           58.4                3.4 +/-    0.46       3.9 +/-    0.46  0.070 / 0.190