PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-21:43:10
G01     39.8           14.5               11.2 +/-    1.16      28.2 +/-    1.16  0.050 / 0.070
G06     176.4          38.7               17.2 +/-    0.66      25.6 +/-    0.66  0.040 / 0.060
G13     235.1          21.1               16.5 +/-    1.47      35.2 +/-    1.47  0.090 / 0.210
G15     268.3          11.6               13.6 +/-    2.78      36.6 +/-    2.78  0.090 / 0.180
G17     7.2            68.6               14.6 +/-    0.73      15.6 +/-    0.73  0.070 / 0.130
G19     282.9          70.2               13.6 +/-    0.33      14.3 +/-    0.33  0.100 / 0.170
G24     315.3          21.7               10.3 +/-    2.92      21.7 +/-    2.92  0.110 / 0.250
G28     69.7           49.2               12.6 +/-    0.79      16.0 +/-    0.79  0.150 / 0.190
G30     154.6          24.2               16.4 +/-    1.54      32.7 +/-    1.54  0.070 / 0.090