PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/30-16:58:00
G01     38.6           12.6                7.1 +/-    1.92      18.7 +/-    1.92  0.080 / 0.180
G02     199.7          10.8                2.5 +/-   15.13       6.8 +/-   15.13  0.110 / 0.200
G06     173.5          43.1               13.6 +/-    1.26      18.8 +/-    1.26  0.030 / 0.040
G13     233.1          19.8               11.3 +/-    1.19      25.0 +/-    1.19  0.030 / 0.040
G15     266.8          10.7                9.0 +/-    2.79      24.8 +/-    2.79  0.120 / 0.170
G17     4.3            68.8               11.6 +/-    0.50      12.3 +/-    0.50  0.140 / 0.210
G19     292.4          71.5               12.4 +/-    0.83      13.0 +/-    0.83  0.040 / 0.080
G24     314.9          22.2               17.1 +/-    1.28      35.6 +/-    1.28  0.040 / 0.080
G28     71.2           49.2               10.7 +/-    0.66      13.7 +/-    0.66  0.210 / 0.520
G30     154.9          21.6               10.6 +/-    1.95      22.4 +/-    1.95  0.310 / 0.460