PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-18:43:10
G02     231.1          70.3                8.8 +/-    0.97       9.3 +/-    0.97  0.150 / 0.240
G05     173.4          12.6               11.5 +/-    2.05      30.4 +/-    2.05  0.110 / 0.240
G06     42.3           60.7                8.3 +/-    0.48       9.4 +/-    0.48  0.030 / 0.050
G12     322.4          51.3                7.1 +/-    1.17       8.8 +/-    1.17  0.040 / 0.050
G17     67.6           24.7                8.3 +/-    1.02      16.3 +/-    1.02  0.030 / 0.070
G19     50.2           43.7                7.8 +/-    0.35      10.7 +/-    0.35  0.030 / 0.060
G24     248.3          37.0               12.6 +/-    1.24      19.3 +/-    1.24  0.050 / 0.110