PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/28-15:27:40
G02     201.1          20.6                9.4 +/-    2.65      20.4 +/-    2.65  0.050 / 0.090
G06     168.7          55.9                9.6 +/-    0.80      11.4 +/-    0.80  0.050 / 0.080
G13     224.7          12.2                7.1 +/-    8.44      18.8 +/-    8.44  0.150 / 0.100
G17     18.6           61.2                7.7 +/-    0.57       8.6 +/-    0.57  0.100 / 0.120
G19     332.9          70.9                7.5 +/-    1.13       7.9 +/-    1.13  0.050 / 0.040
G24     308.9          30.2                6.8 +/-    1.92      11.9 +/-    1.92  0.040 / 0.040
G28     85.3           43.8                8.8 +/-    0.95      12.0 +/-    0.95  0.050 / 0.030
G30     157.1          12.4                9.6 +/-    2.25      25.5 +/-    2.25  0.050 / 0.030