PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-19:27:50
G01     52.4           26.9               12.0 +/-    2.16      22.4 +/-    2.16  0.040 / 0.060
G06     179.2          20.1               15.5 +/-    1.73      34.0 +/-    1.73  0.030 / 0.050
G07     144.1          10.0               15.4 +/-    1.93      43.0 +/-    1.93  0.150 / 0.320
G11     45.1           17.3               11.0 +/-    2.03      25.8 +/-    2.03  0.130 / 0.340
G13     253.0          32.8               14.3 +/-    1.86      23.6 +/-    1.86  0.190 / 0.330
G15     286.0          16.3               12.2 +/-    1.29      29.4 +/-    1.29  0.200 / 0.240
G17     294.3          79.2               16.0 +/-    0.59      16.2 +/-    0.59  0.070 / 0.160
G19     241.0          57.8               15.3 +/-    2.08      17.8 +/-    2.08  0.100 / 0.150
G28     40.0           56.9               14.4 +/-    0.89      16.8 +/-    0.89  0.080 / 0.080
G30     147.5          42.3               15.3 +/-    0.74      21.4 +/-    0.74  0.060 / 0.070