PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/24-22:28:00
G01     40.0           14.5                9.7 +/-    2.83      24.4 +/-    2.83  0.070 / 0.070
G02     199.1          11.5               10.3 +/-   23.78      27.8 +/-   23.78  0.050 / 0.070
G06     174.0          42.3               14.3 +/-    0.45      20.0 +/-    0.45  0.090 / 0.220
G13     235.8          20.3               14.0 +/-    3.80      30.7 +/-    3.80  0.100 / 0.210
G15     268.6          11.4               12.6 +/-    1.02      34.1 +/-    1.02  0.110 / 0.180
G17     355.0          70.9               10.9 +/-    0.34      11.5 +/-    0.34  0.100 / 0.340
G19     283.4          69.4               11.0 +/-    0.31      11.7 +/-    0.31  0.170 / 0.240
G24     315.7          21.3               10.1 +/-    3.16      21.5 +/-    3.16  0.130 / 0.290
G28     75.4           45.3               11.7 +/-    1.36      15.7 +/-    1.36  0.090 / 0.160
G30     154.8          23.5               14.8 +/-    2.72      30.0 +/-    2.72  0.090 / 0.130