PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/26-06:58:00
G01     222.0          14.0                4.6 +/-    2.66      11.6 +/-    2.66  0.040 / 0.040
G03     274.9          70.2                5.0 +/-    1.10       5.3 +/-    1.10  0.040 / 0.040
G14     89.4           22.4                3.0 +/-    2.13       6.2 +/-    2.13  0.130 / 0.280
G16     141.9          48.5                5.4 +/-    0.46       6.9 +/-    0.46  0.120 / 0.330
G22     209.7          67.0                5.5 +/-    0.31       5.9 +/-    0.31  0.130 / 0.200
G23     313.2          44.1                4.4 +/-    1.24       6.1 +/-    1.24  0.130 / 0.160
G26     89.6           54.4                4.2 +/-    0.50       5.1 +/-    0.50  0.040 / 0.070
G31     47.5           27.2                0.9 +/-    2.19       1.7 +/-    2.19  0.040 / 0.110