PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-08:27:50
G01     241.3          31.0                9.4 +/-    1.05      16.1 +/-    1.05  0.090 / 0.120
G03     313.4          53.4                4.3 +/-    2.01       5.2 +/-    2.01  0.080 / 0.130
G14     67.7           36.2                3.2 +/-    0.51       4.9 +/-    0.51  0.040 / 0.040
G16     159.6          24.7                6.3 +/-    1.31      12.4 +/-    1.31  0.040 / 0.040
G18     214.1          20.7                6.9 +/-    1.36      14.9 +/-    1.36  0.050 / 0.020
G22     286.7          73.2                4.7 +/-    0.67       4.9 +/-    0.67  0.060 / 0.030
G23     293.9          26.9                5.3 +/-    1.43       9.9 +/-    1.43  0.060 / 0.150
G26     129.2          44.1                5.8 +/-    0.80       7.9 +/-    0.80  0.050 / 0.110
G31     41.2           49.4                2.9 +/-    0.33       3.7 +/-    0.33  0.100 / 0.160
G32     82.5           20.0                3.1 +/-    1.13       6.8 +/-    1.13  0.060 / 0.130