PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/21-10:42:50
G02     210.1          51.7                8.6 +/-    0.62      10.7 +/-    0.62  0.110 / 0.130
G06     90.2           78.6                5.7 +/-    0.39       5.8 +/-    0.39  0.080 / 0.130
G12     315.5          30.7                5.7 +/-    1.21       9.9 +/-    1.21  0.030 / 0.020
G17     49.4           38.3                4.9 +/-    1.42       7.3 +/-    1.42  0.030 / 0.020
G19     31.1           53.2                5.6 +/-    0.55       6.8 +/-    0.55  0.120 / 0.190
G24     278.7          41.5                9.2 +/-    1.71      13.0 +/-    1.71  0.110 / 0.180
G28     113.7          26.9                5.9 +/-    1.06      11.0 +/-    1.06  0.080 / 0.070