PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/31-13:58:00
G01     54.7           27.9                3.5 +/-    1.53       6.3 +/-    1.53  0.040 / 0.050
G06     178.3          19.0              -23.6 +/-   11.66     -53.2 +/-   11.66  0.040 / 0.050
G07     143.4          15.3                5.9 +/-    2.16      14.6 +/-    2.16  0.100 / 0.280
G11     46.3           21.0                5.1 +/-    2.64      11.0 +/-    2.64  0.210 / 0.350
G13     256.1          34.3                9.6 +/-    0.90      15.5 +/-    0.90  0.030 / 0.030
G15     289.8          16.2                6.3 +/-    2.05      15.2 +/-    2.05  0.030 / 0.030
G17     264.8          75.8                6.4 +/-    0.42       6.6 +/-    0.42  0.110 / 0.080
G19     237.1          56.2                6.6 +/-    2.50       7.8 +/-    2.50  0.090 / 0.090
G28     32.3           58.5                5.6 +/-    1.03       6.5 +/-    1.03  0.110 / 0.000
G30     146.4          47.4                7.2 +/-    0.79       9.4 +/-    0.79  0.130 / 0.270