PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/18-13:57:40
G01     82.8           32.3                5.7 +/-    1.33       9.5 +/-    1.33  0.040 / 0.080
G07     130.0          37.2                7.8 +/-    0.52      11.9 +/-    0.52  0.050 / 0.070
G11     62.5           38.1                6.6 +/-    1.12       9.8 +/-    1.12  0.040 / 0.060
G13     287.4          38.4                5.4 +/-    1.57       8.1 +/-    1.57  0.030 / 0.050
G15     311.4          12.1                6.8 +/-    1.19      18.1 +/-    1.19  0.050 / 0.050
G17     217.9          55.5                9.2 +/-    1.38      10.9 +/-    1.38  0.040 / 0.060
G19     216.2          33.3                9.4 +/-    1.77      15.4 +/-    1.77  0.110 / 0.110
G28     346.0          61.6                6.4 +/-    0.67       7.1 +/-    0.67  0.090 / 0.130
G30     120.0          70.8                8.1 +/-    0.75       8.5 +/-    0.75  0.120 / 0.230