PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-13:12:40
G01     125.9          12.6                5.7 +/-    2.86      15.0 +/-    2.86  0.030 / 0.050
G07     57.0           69.4                5.5 +/-    0.51       5.9 +/-    0.51  0.040 / 0.040
G08     49.1           37.8                4.7 +/-    0.65       7.2 +/-    0.65  0.060 / 0.090
G09     176.7          33.0                6.8 +/-    1.43      11.2 +/-    1.43  0.050 / 0.110
G11     116.0          36.1                7.1 +/-    1.12      11.0 +/-    1.12  0.100 / 0.370
G13     320.7          12.9                3.5 +/-    2.91       9.1 +/-    2.91  0.100 / 0.340
G17     200.0          16.4                7.9 +/-    2.69      19.0 +/-    2.69  0.030 / 0.060
G18     102.1          17.3                5.7 +/-    1.40      13.5 +/-    1.40  0.040 / 0.060
G28     278.3          53.5                7.0 +/-    0.97       8.5 +/-    0.97  0.030 / 0.030
G30     333.3          61.0                4.8 +/-    0.65       5.4 +/-    0.65  0.030 / 0.030