PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/15-14:58:00
G01     57.3           29.1                5.7 +/-    1.46      10.1 +/-    1.46  0.040 / 0.050
G07     142.3          17.1                9.4 +/-    1.53      22.3 +/-    1.53  0.050 / 0.050
G11     47.2           22.7                4.2 +/-    2.91       8.6 +/-    2.91  0.110 / 0.320
G13     259.1          35.4               10.9 +/-    2.06      17.1 +/-    2.06  0.130 / 0.330
G15     291.9          16.4                8.2 +/-    2.87      19.8 +/-    2.87  0.070 / 0.120
G17     257.5          75.0                9.8 +/-    0.36      10.1 +/-    0.36  0.140 / 0.150
G18     40.4           11.1                4.6 +/-    3.29      12.5 +/-    3.29  0.030 / 0.030
G19     234.0          53.8               11.1 +/-    2.33      13.4 +/-    2.33  0.030 / 0.040
G28     28.4           59.0                8.4 +/-    0.66       9.7 +/-    0.66  0.100 / 0.050
G30     144.7          49.2                9.1 +/-    0.76      11.6 +/-    0.76  0.070 / 0.070