PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-21:43:00
G01     40.9           16.3               10.8 +/-    2.69      26.0 +/-    2.69  0.140 / 0.320
G06     176.9          36.2               17.3 +/-    1.86      26.8 +/-    1.86  0.230 / 0.360
G13     237.0          22.7               17.6 +/-    2.00      36.3 +/-    2.00  0.070 / 0.190
G15     270.4          12.4               14.5 +/-    4.27      38.5 +/-    4.27  0.150 / 0.220
G17     3.0            70.4               11.6 +/-    0.37      12.2 +/-    0.37  0.150 / 0.180
G19     275.8          69.2               12.4 +/-    0.56      13.2 +/-    0.56  0.210 / 0.290
G24     316.1          19.9                8.6 +/-    2.61      19.0 +/-    2.61  0.030 / 0.040
G28     66.5           50.2               11.3 +/-    0.99      14.2 +/-    0.99  0.040 / 0.030
G30     154.0          26.5               16.5 +/-    1.56      31.1 +/-    1.56  0.080 / 0.150