PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-00:28:00
G10     254.0          29.5               12.4 +/-    2.11      22.0 +/-    2.11  0.050 / 0.040
G13     50.2           27.5                7.2 +/-    2.14      13.2 +/-    2.14  0.040 / 0.040
G15     82.5           58.0               10.9 +/-    0.75      12.6 +/-    0.75  0.130 / 0.360
G16     290.4          15.5                9.8 +/-    1.29      23.9 +/-    1.29  0.130 / 0.420
G20     263.2          36.5               14.7 +/-    3.33      22.7 +/-    3.33  0.090 / 0.240
G21     337.3          62.2               10.6 +/-    0.67      11.8 +/-    0.67  0.060 / 0.170
G26     262.7          14.1               10.3 +/-    2.36      26.1 +/-    2.36  0.030 / 0.040
G29     166.2          46.7               11.0 +/-    0.78      14.5 +/-    0.78  0.030 / 0.030