PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/12-22:42:40
G01     83.2           32.7                8.2 +/-    0.92      13.7 +/-    0.92  0.040 / 0.060
G07     130.5          35.8               11.1 +/-    0.86      17.3 +/-    0.86  0.040 / 0.060
G11     61.0           36.4                6.9 +/-    0.33      10.7 +/-    0.33  0.060 / 0.100
G13     287.3          38.0                7.5 +/-    0.99      11.3 +/-    0.99  0.060 / 0.120
G15     310.9          12.5                8.9 +/-    1.60      23.6 +/-    1.60  0.030 / 0.040
G17     218.2          61.1               12.1 +/-    1.43      13.6 +/-    1.43  0.030 / 0.030
G18     55.4           20.7                6.1 +/-    1.17      13.1 +/-    1.17  0.080 / 0.120
G19     216.9          31.9               13.9 +/-    1.32      23.4 +/-    1.32  0.080 / 0.120
G28     352.0          61.6                7.0 +/-    1.27       7.8 +/-    1.27  0.030 / 0.070
G30     120.1          71.3                9.1 +/-    0.67       9.5 +/-    0.67  0.030 / 0.080