PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-20:58:00
G01     52.6           27.0               10.2 +/-    2.33      19.1 +/-    2.33  0.200 / 0.290
G06     179.9          19.3               16.2 +/-    2.02      36.2 +/-    2.02  0.130 / 0.350
G07     144.1          10.0               15.7 +/-    2.72      43.6 +/-    2.72  0.050 / 0.120
G11     45.0           17.1               10.0 +/-    2.10      23.6 +/-    2.10  0.050 / 0.060
G13     253.2          32.7               14.1 +/-    1.41      23.4 +/-    1.41  0.030 / 0.050
G15     286.0          16.3               12.8 +/-    1.46      30.9 +/-    1.46  0.040 / 0.040
G17     298.4          79.5               13.6 +/-    0.71      13.8 +/-    0.71  0.110 / 0.180
G19     240.8          57.4               14.3 +/-    2.48      16.6 +/-    2.48  0.100 / 0.150
G28     40.6           56.7               12.3 +/-    0.77      14.4 +/-    0.77  0.070 / 0.150
G30     147.7          43.2               13.7 +/-    0.96      18.9 +/-    0.96  0.080 / 0.160