PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/08-20:27:50
G01     96.4           29.7               15.3 +/-    1.00      27.1 +/-    1.00  0.050 / 0.050
G07     121.1          44.7               15.4 +/-    0.73      20.9 +/-    0.73  0.040 / 0.060
G08     41.7           11.3               10.8 +/-    2.29      29.2 +/-    2.29  0.030 / 0.050
G11     73.9           41.5               13.7 +/-    2.06      19.4 +/-    2.06  0.050 / 0.040
G13     300.4          34.6               13.0 +/-    1.08      20.7 +/-    1.08  0.100 / 0.150
G17     209.5          48.8               17.0 +/-    0.92      21.7 +/-    0.92  0.100 / 0.270
G18     67.3           23.6               12.6 +/-    1.15      25.5 +/-    1.15  0.060 / 0.120
G19     211.6          21.9               16.2 +/-    1.39      34.2 +/-    1.39  0.060 / 0.140
G28     328.3          61.2               13.0 +/-    1.10      14.6 +/-    1.10  0.030 / 0.030
G30     83.4           78.4               15.1 +/-    0.81      15.4 +/-    0.81  0.030 / 0.020