PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-14:58:10
G01     110.2          22.9                8.6 +/-    1.39      17.6 +/-    1.39  0.060 / 0.060
G07     103.7          56.7               10.2 +/-    1.21      11.9 +/-    1.21  0.080 / 0.060
G08     42.7           25.3                8.5 +/-    2.21      16.5 +/-    2.21  0.050 / 0.080
G09     176.2          18.7                9.5 +/-    1.30      21.6 +/-    1.30  0.050 / 0.090
G11     94.0           43.1                8.6 +/-    0.80      11.9 +/-    0.80  0.030 / 0.040
G13     312.2          26.9                8.4 +/-    1.79      15.7 +/-    1.79  0.030 / 0.040
G17     204.0          31.7                9.0 +/-    1.05      15.3 +/-    1.05  0.080 / 0.250
G18     83.5           23.3                8.8 +/-    1.51      17.9 +/-    1.51  0.080 / 0.180
G28     299.5          57.3                8.7 +/-    1.07      10.2 +/-    1.07  0.090 / 0.120
G30     18.8           76.7               10.0 +/-    1.02      10.3 +/-    1.02  0.100 / 0.120