PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/25-12:58:00
G01     99.6           28.0                5.6 +/-    1.39      10.3 +/-    1.39  0.050 / 0.070
G07     116.6          49.9                7.4 +/-    0.78       9.4 +/-    0.78  0.060 / 0.060
G08     41.8           18.2                5.0 +/-    2.46      11.5 +/-    2.46  0.040 / 0.040
G11     80.3           43.4                6.6 +/-    1.24       9.1 +/-    1.24  0.030 / 0.050
G13     303.7          33.3                5.4 +/-    2.06       8.8 +/-    2.06  0.050 / 0.060
G17     208.5          40.5                7.9 +/-    1.64      11.4 +/-    1.64  0.040 / 0.070
G18     72.7           24.5                6.4 +/-    1.96      12.7 +/-    1.96  0.160 / 0.180
G19     209.9          19.9               -0.1 +/-    9.47      -0.2 +/-    9.47  0.090 / 0.190
G28     317.2          59.9                5.4 +/-    1.10       6.1 +/-    1.10  0.140 / 0.160
G30     61.7           79.7                6.9 +/-    0.41       7.0 +/-    0.41  0.110 / 0.120