PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-16:58:00
G01     48.5           24.2                9.0 +/-    0.92      17.9 +/-    0.92  0.050 / 0.060
G06     177.4          25.4               14.1 +/-    1.90      27.3 +/-    1.90  0.040 / 0.070
G11     44.2           14.2                9.2 +/-    1.96      23.3 +/-    1.96  0.120 / 0.290
G13     248.2          30.4               13.8 +/-    1.73      23.9 +/-    1.73  0.120 / 0.250
G15     282.0          15.6               10.2 +/-    2.04      25.1 +/-    2.04  0.090 / 0.140
G17     310.1          78.4               12.2 +/-    0.49      12.4 +/-    0.49  0.090 / 0.120
G19     248.2          61.9               13.0 +/-    0.61      14.5 +/-    0.61  0.030 / 0.030
G28     46.2           55.9               11.1 +/-    0.58      13.1 +/-    0.58  0.030 / 0.030
G30     149.6          37.7               12.1 +/-    0.93      18.4 +/-    0.93  0.050 / 0.050