PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-00:27:40
G01     87.3           32.4                8.6 +/-    0.60      14.4 +/-    0.60  0.050 / 0.060
G07     127.7          43.7               12.0 +/-    0.85      16.5 +/-    0.85  0.060 / 0.070
G11     69.1           40.7                8.0 +/-    0.73      11.5 +/-    0.73  0.030 / 0.050
G13     292.5          36.2                9.2 +/-    1.26      14.3 +/-    1.26  0.040 / 0.060
G15     313.1          11.6                6.9 +/-    2.31      18.6 +/-    2.31  0.050 / 0.100
G17     216.9          53.9               10.8 +/-    1.18      13.0 +/-    1.18  0.050 / 0.090
G19     215.8          29.5               11.8 +/-    0.73      21.0 +/-    0.73  0.040 / 0.100
G28     355.3          61.5                7.8 +/-    0.94       8.8 +/-    0.94  0.040 / 0.100
G30     115.5          70.2                9.5 +/-    0.67      10.0 +/-    0.67  0.070 / 0.110