PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/21-06:58:10
G01     228.2          20.3                7.5 +/-    1.62      16.4 +/-    1.62  0.090 / 0.150
G03     297.1          65.6                5.6 +/-    0.53       6.1 +/-    0.53  0.070 / 0.190
G14     81.7           27.7                4.1 +/-    0.93       7.5 +/-    0.93  0.100 / 0.220
G16     149.7          40.0                5.4 +/-    0.64       7.9 +/-    0.64  0.330 / 0.260
G22     231.2          73.5                6.3 +/-    0.64       6.6 +/-    0.64  0.030 / 0.030
G23     306.6          38.3                4.7 +/-    1.20       7.1 +/-    1.20  0.030 / 0.040
G26     106.0          52.9                6.1 +/-    0.49       7.4 +/-    0.49  0.060 / 0.090
G31     44.3           34.7                3.7 +/-    1.45       5.9 +/-    1.45  0.050 / 0.100
G32     95.0           9.9                 4.5 +/-    1.71      12.6 +/-    1.71  0.040 / 0.040