PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/13-11:27:50
G01     43.6           19.6                2.7 +/-    0.95       5.9 +/-    0.95  0.030 / 0.070
G06     174.8          33.0                5.3 +/-    1.05       8.7 +/-    1.05  0.050 / 0.060
G11     43.7           10.5                1.5 +/-    2.72       4.1 +/-    2.72  0.140 / 0.260
G13     241.8          26.7                6.4 +/-    1.99      11.9 +/-    1.99  0.130 / 0.240
G15     277.4          13.9                3.5 +/-    1.11       8.9 +/-    1.11  0.020 / 0.030
G17     335.9          76.1                4.8 +/-    0.46       5.0 +/-    0.46  0.030 / 0.030
G19     262.2          67.4                4.4 +/-    0.43       4.7 +/-    0.43  0.090 / 0.210
G24     318.3          12.9                0.6 +/-    1.78       1.6 +/-    1.78  0.090 / 0.230
G28     54.1           54.6                2.7 +/-    0.29       3.2 +/-    0.29  0.040 / 0.040
G30     153.2          35.3                6.0 +/-    1.55       9.4 +/-    1.55  0.050 / 0.040