PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/28-15:58:10
G01     61.6           30.7                9.1 +/-    0.79      15.6 +/-    0.79  0.070 / 0.140
G07     140.6          20.1               10.8 +/-    0.98      23.6 +/-    0.98  0.090 / 0.150
G11     48.8           25.5                8.5 +/-    0.84      16.4 +/-    0.84  0.040 / 0.060
G13     264.0          36.8               12.7 +/-    0.89      19.5 +/-    0.89  0.040 / 0.060
G15     295.4          16.4                8.5 +/-    3.16      20.5 +/-    3.16  0.080 / 0.220
G17     246.6          73.1               11.8 +/-    0.60      12.3 +/-    0.60  0.080 / 0.220
G18     42.7           13.5                6.4 +/-    1.27      16.5 +/-    1.27  0.050 / 0.090
G19     229.7          50.0               13.1 +/-    0.79      16.5 +/-    0.79  0.050 / 0.080
G28     21.8           59.7               10.7 +/-    0.67      12.1 +/-    0.67  0.030 / 0.040
G30     141.9          52.2               10.8 +/-    1.35      13.3 +/-    1.35  0.030 / 0.030