PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/13-07:42:50
G02     226.1          71.5                7.9 +/-    0.63       8.3 +/-    0.63  0.040 / 0.040
G06     44.6           66.3                5.9 +/-    0.57       6.4 +/-    0.57  0.040 / 0.050
G12     320.8          45.8                5.6 +/-    0.63       7.5 +/-    0.63  0.050 / 0.060
G17     64.2           26.2                5.9 +/-    1.93      11.1 +/-    1.93  0.040 / 0.060
G19     50.1           41.8                4.7 +/-    1.11       6.6 +/-    1.11  0.170 / 0.540
G24     256.0          38.4                9.6 +/-    1.43      14.3 +/-    1.43  0.130 / 0.420
G28     125.8          15.3                8.4 +/-    2.31      20.7 +/-    2.31  0.040 / 0.040