PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/23-12:57:40
G01     42.6           18.5                4.0 +/-    3.83       9.2 +/-    3.83  0.260 / 0.260
G06     174.6          34.7                5.6 +/-    1.20       8.9 +/-    1.20  0.190 / 0.220
G13     240.2          25.5                7.5 +/-    2.21      14.4 +/-    2.21  0.030 / 0.020
G15     275.7          13.4                5.6 +/-    0.83      14.4 +/-    0.83  0.030 / 0.030
G17     338.1          75.3                5.3 +/-    0.67       5.5 +/-    0.67  0.050 / 0.040
G19     266.7          68.3                4.9 +/-    0.58       5.2 +/-    0.58  0.040 / 0.040
G24     317.8          14.6                2.6 +/-    1.37       6.6 +/-    1.37  0.060 / 0.100
G28     57.5           53.6                4.8 +/-    0.88       5.8 +/-    0.88  0.070 / 0.120
G30     153.5          32.6                5.4 +/-    1.14       9.0 +/-    1.14  0.090 / 0.240