PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-20:12:50
G01     93.5           30.5               12.5 +/-    0.90      21.6 +/-    0.90  0.040 / 0.060
G07     123.5          42.3               12.5 +/-    0.99      17.5 +/-    0.99  0.030 / 0.080
G11     70.8           40.7               11.2 +/-    0.80      16.1 +/-    0.80  0.050 / 0.050
G13     297.6          35.7               10.9 +/-    1.55      17.1 +/-    1.55  0.040 / 0.040
G17     211.1          51.2               13.1 +/-    1.07      16.3 +/-    1.07  0.140 / 0.110
G18     64.7           23.4                9.9 +/-    1.37      20.1 +/-    1.37  0.090 / 0.130
G19     212.6          24.3               14.1 +/-    1.95      28.0 +/-    1.95  0.030 / 0.020
G28     333.2          61.4               10.6 +/-    0.58      11.8 +/-    0.58  0.030 / 0.030
G30     95.5           77.0               12.1 +/-    0.71      12.4 +/-    0.71  0.160 / 0.240