PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/23-14:28:10
G02     207.5          41.2                8.8 +/-    1.02      12.5 +/-    1.02  0.060 / 0.070
G06     130.1          77.4                7.9 +/-    0.35       8.1 +/-    0.35  0.050 / 0.080
G12     311.6          22.4                6.1 +/-    1.16      12.7 +/-    1.16  0.030 / 0.050
G17     41.3           45.2                5.8 +/-    0.89       7.8 +/-    0.89  0.040 / 0.050
G19     20.9           58.4                6.5 +/-    0.92       7.5 +/-    0.92  0.040 / 0.040
G24     287.5          40.7                2.3 +/-    2.77       3.3 +/-    2.77  0.040 / 0.040
G28     107.9          30.8                7.4 +/-    0.99      12.7 +/-    0.99  0.030 / 0.020